Diagnosis Item 3: Diagnose shorts in the earth to CAN-C.
| caution |
- When servicing a CAN bus line, earth yourself by touching a metal
object such as an unpainted water pipe. If you fail to do, a component
connected to the CAN bus line may be broken.
- When the ETACS-ECU of vehicles without KOS is replaced, the encrypted
code of the ignition key needs to be registered to the ETACS-ECU. (If the
encrypted code is not registered, the engine cannot be started. Register
the encrypted code as described in GROUP 54A, Immobilizer System -
How to Register Key ID.)
|
TROUBLE JUDGEMENT CONDITIONS
The M.U.T.-III judges the trouble
when it is impossible to receive the periodically sent data and the voltage of
CAN_H or CAN_L line is less than 1.0 V.
TROUBLESHOOTING HINTS
- Malfunction of the wiring harness
- Malfunction of the connector
- Malfunction of the ETACS-ECU
- Malfunction of the gateway-ECU <Vehicles with Blind Spot Warning
[BSW] (with Lane Change Assist) system>
- Malfunction of the SRS-ECU
- Malfunction of the column switch assembly (steering wheel sensor)
<Vehicles with ASC>
- Malfunction of the electric parking brake ECU <Vehicles with
electric parking brake>
- Malfunction of the clearance warning control unit <Vehicles with
ultrasonic misacceleration mitigation system/corner sensor system or
reversing sensor system>
- Malfunction of the 4WD-ECU <Vehicles without S-AWC> or
AWC-ECU <Vehicles with S-AWC>
- Malfunction of the FCM/LDW/AHB-ECU <Vehicles with
FCM>
- Malfunction of the ABS-ECU <Vehicles without ASC> or ASC-ECU
<Vehicles with ASC>
- Malfunction of the EPS-ECU
- Malfunction of the CVT-ECU <CVT> or A/T-ECU
<A/T>
- Malfunction of the AS&G-ECU <Vehicles with AS&G
system>
- Malfunction of the ACC-ECU <Vehicles with ACC>
- Malfunction of the engine-ECU
|
|
STEP 1. Check the CAN-C. Resistance measurement at diagnosis
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
| note |
This inspection allows you to check that there is a
short to earth in either CAN_H line or CAN_L line. Thus, in
the following steps, check the CAN-C that is defective.
|
|
|
|
(1)Disconnect engine-ECU connector and ETACS-ECU connector,
and measure the resistance at harness side of diagnosis connector.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal..
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between diagnosis connector terminal No.6
(CAN_H) and body earth
OK: 1 kΩ or
more
|
|
|
(4)Resistance between diagnosis connector terminal No.14
(CAN_L) and body earth
OK: 1 kΩ or
more
|
|
|
Q.
Is the check result normal?
|
|
|
 <Both of the measurement
results show 1 kΩ or more> Go to Step 43.
|
|
|
|
|
|
 <Either of CAN_H line
or CAN_L line the measurement results show less than 1
kΩ> Go to Step 2.
|
|
|
|
|
|
STEP 2. Check the CAN-C. Resistance measurement at C-126 intermediate
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect the intermediate connector, and measure at its
female-side intermediate connector (at the front wiring harness
side).
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between C-126 intermediate connector terminal
No.15 (CAN_H) and body earth
OK: 1 kΩ or
more
|
|
|
(4)Resistance between C-126 intermediate connector terminal
No.16 (CAN_L) and body earth
OK: 1 kΩ or
more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 20.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 3.
|
|
|
|
|
|
STEP 3. Check the CAN-C between joint connector (CAN1) and the
engine-ECU. Resistance measurement at joint connector
(CAN1).
|
|
|
| note |
Step 3 is only for vehicles without ACC. On
vehicles with it, go to Step 4 .
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN1) terminal No.8
(CAN_H) and body earth
OK: 1 kΩ or
more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.17
(CAN_L) and body earth
OK: 1 kΩ or
more
| caution |
Strictly observe the specified wiring harness repair
procedure.
|
|
|
|
Q.
Is the check result normal?
|
|
|
YES  : <1 kΩ or
more> Go to Step 8.
|
|
|
|
|
|
<Less than 1 kΩ >
Repair the wiring harness between joint connector (CAN1) and the engine-ECU
connector.
|
|
|
|
|
|
STEP 4. Check the CAN-C between joint connector (CAN1) and the
engine-ECU. Resistance measurement at joint connector
(CAN1).
|
|
|
| note |
Step 4 is only for vehicles with ACC. On vehicles
without it, go to Step 5.
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN1) terminal No.8
(CAN_H) and body earth
OK: 1 kΩ or
more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.17
(CAN_L) and body earth
OK: 1 kΩ or
more
|
|
|
Q.
Is the check result normal?
|
|
|
YES : <1 kΩ or
more> Go to Step 8.
|
|
|
|
|
|
<Less than 1
kΩ> Go to Step 5.
|
|
|
|
|
|
STEP 5. Check the CAN-C between joint connector (CAN2) and the ACC-ECU.
Resistance measurement at joint connector (CAN2).
|
|
|
| note |
Step 5, 6 and 7 are only for vehicles with ACC. On
vehicles without it, go to Step 8.
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN2) terminal No.9
(CAN_H) and body earth
OK: 1 kΩ or
more
|
|
|
(4)Resistance between joint connector (CAN2) terminal No.20
(CAN_L) and body earth
OK: 1 kΩ or
more
| caution |
Strictly observe the specified wiring harness repair
procedure.
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Repair the wiring harness between joint connector (CAN1) and the engine-ECU
connector.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 6.
|
|
|
|
|
|
STEP 6. M.U.T.-III CAN bus diagnostics [ACC-ECU connector
disconnected]
|
|
|
(1)Disconnect ACC-ECU connector, and diagnose by using the
M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN2) and the ACC-ECU connector.
Check the ACC-ECU connector, and
repair if necessary. If the ACC-ECU connector is in good condition, go to
Step 7.
|
|
|
STEP 7. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the ACC-ECU connector, and repair if necessary. If the ACC-ECU connector is
in good condition, replace the ACC-ECU.
|
|
|
|
|
|
STEP 8. Check the CAN-C between joint connector (CAN1) and the CVT-ECU
<CVT> or A/T-ECU <A/T>. Resistance measurement at
joint connector (CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN1) terminal No.4
(CAN_H) and body earth
OK: 1 kΩ or
more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.13
(CAN_L) and body earth
OK: 1 kΩ or
more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 11.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 9.
|
|
|
|
|
|
STEP 9. M.U.T.-III CAN bus diagnostics [CVT-ECU <CVT>
or A/T-ECU <A/T> connector disconnected]
|
|
|
(1)Disconnect CVT-ECU <CVT> connector or A/T-ECU
<A/T> connector, and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) and the CVT-ECU <CVT> connector or
A/T-ECU <A/T> connector.
Check the CVT-ECU
<CVT> connector or A/T-ECU <A/T> connector, and
repair if necessary. If the CVT-ECU <CVT> connector or A/T-ECU
<A/T> connector is in good condition, go to Step
10.
|
|
|
STEP 10. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the CVT-ECU <CVT> connector or A/T-ECU <A/T>
connector, and repair if necessary. If the CVT-ECU <CVT>
connector or A/T-ECU <A/T> connector is in good condition,
replace the CVT-ECU <CVT> or A/T-ECU
<A/T>.
|
|
|
|
|
|
STEP 11. Check the CAN line between joint connector (CAN1) and the
EPS-ECU. Resistance measurement at joint connector (CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN1) terminal No.6
(CAN_H) and body earth
OK: 1 kΩ or
more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.15
(CAN_L) and body earth
OK: 1 kΩ or
more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 14.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 12.
|
|
|
|
|
|
STEP 12. M.U.T.-III CAN bus diagnostics [EPS-ECU connector
disconnected]
|
|
|
(1)Disconnect EPS-ECU connector, and diagnose by using the
M.U.T.-III.
|
|
(2)Diagnose CAN-C, and check if M.U.T.-III
screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) and the EPS-ECU connector.
Check the EPS-ECU connector, and
repair if necessary. If the EPS-ECU connector is in good condition, go to
Step 13.
|
|
|
STEP 13. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the EPS-ECU connector, and repair if necessary. If the EPS-ECU connector is
in good condition, replace the EPS-ECU.
|
|
|
|
|
|
STEP 14. Check the CAN line between joint connector (CAN1) and the
AS&G-ECU. Resistance measurement at joint connector
(CAN1).
|
|
|
| note |
Step 14, 15 and 16 are only for vehicles with
AS&G. On vehicles without it, go to Step 17.
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN1) terminal No.5
(CAN_H) and body earth
OK: 1 kΩ or
more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.14
(CAN_L) and body earth
OK: 1 kΩ or
more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 17.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 15.
|
|
|
|
|
|
STEP 15. M.U.T.-III CAN bus diagnostics [AS&G-ECU connector
disconnected]
|
|
|
(1)Disconnect EPS-ECU connector, and diagnose by using the
M.U.T.-III.
|
|
(2)Diagnose CAN-C, and check if M.U.T.-III
screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) and the AS&G-ECU connector.
Check the
AS&G-ECU connector, and repair if necessary. If the AS&G-ECU
connector is in good condition, go to Step 16.
|
|
|
STEP 16. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the AS&G-ECU connector, and repair if necessary. If the
AS&G-ECU connector is in good condition, replace the
AS&G-ECU.
|
|
|
|
|
|
STEP 17. Check the CAN-C between joint connector (CAN1) and the ABS-ECU
<Vehicles without ASC> or ASC-ECU <Vehicles with
ASC>. Resistance measurement at joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN1) terminal No.7
(CAN_H) and body earth
OK: 1 kΩ or
more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.16
(CAN_L) and body earth
OK: 1 kΩ or
more
| caution |
Strictly observe the specified wiring harness repair
procedure.
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Repair intermediate connector C-126, or the wiring harness between joint
connector (CAN1) and intermediate connector C-126.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 18.
|
|
|
|
|
|
STEP 18. M.U.T.-III CAN bus diagnostics [ABS-ECU <Vehicles
without ASC> or ASC-ECU <Vehicles with ASC> connector
disconnected]
|
|
|
(1)Disconnect ABS-ECU <Vehicles without ASC> or
ASC-ECU <Vehicles with ASC> connector, and diagnose by using the
M.U.T.-III.
|
|
(2)Diagnose CAN-C, and check if M.U.T.-III
screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) and the ABS-ECU <Vehicles without ASC>
or ASC-ECU <Vehicles with ASC> connector.
Check the ABS-ECU
<Vehicles without ASC> or ASC-ECU <Vehicles with
ASC> connector, and repair if necessary. If the ABS-ECU
<Vehicles without ASC> or ASC-ECU <Vehicles with
ASC> connector is in good condition, go to Step 19.
|
|
|
STEP 19. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles
with ASC> connector, and repair if necessary. If the ABS-ECU
<Vehicles without ASC> or ASC-ECU <Vehicles with
ASC> connector is in good condition, replace the ABS-ECU
<Vehicles without ASC> or ASC-ECU <Vehicles with
ASC>.
|
|
|
|
|
|
STEP 20. Check CAN line between joint connector (CAN3)
<LHD> or joint connector (CAN4) <RHD> and the
ETACS-ECU. Resistance measurement at joint connector (CAN3)
<LHD> or joint connector (CAN4)
<RHD>.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3) <LHD> or
joint connector (CAN4) <RHD>, and measure at the wiring harness
side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN3) terminal No.11
(CAN_H) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between joint connector (CAN3) terminal No.22
(CAN_L) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between joint connector (CAN4) terminal No.5
(CAN_H) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between joint connector (CAN4) terminal No.14
(CAN_L) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(7)
| caution |
Strictly observe the specified wiring harness repair
procedure.
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 21.
|
|
|
|
|
|
NO : <Less than 1 kΩ > Repair
the wiring harness between joint connector (CAN3) <LHD> or
joint connector (CAN4) <RHD> and the ETACS-ECU
connector.
|
|
|
|
|
|
STEP 21. Check the CAN-C between joint connector (CAN3)
<LHD> or joint connector (CAN4) <RHD> and the
4WD-ECU <Vehicles without S-AWC> or AWC-ECU <Vehicles
with S-AWC>. Resistance measurement at joint connector (CAN3)
<LHD> or joint connector (CAN4)
<RHD>.
|
|
|
| note |
Step 21, 22 and 23 are only for vehicles with 4WD.
On vehicles without it, go to Step 24.
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3) <LHD> or
joint connector (CAN4) <RHD>, and measure at the wiring harness
side.
|
|
|
(2)Disconnect FCM/LDW/AHB-ECU connector. <RHD (Vehicles
with FCM)>
|
|
|
(3)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(4)Resistance between joint connector (CAN3) terminal No.5
(CAN_H) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between joint connector (CAN3) terminal No.16
(CAN_L) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between joint connector (CAN4) terminal No.9
(CAN_H) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(7)Resistance between joint connector (CAN4) terminal No.18
(CAN_L) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 24.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 22.
|
|
|
|
|
|
STEP 22. M.U.T.-III CAN bus diagnostics [4WD-ECU <Vehicles
without S-AWC> or AWC-ECU <Vehicles with S-AWC>
connector disconnected]
|
|
|
(1)Disconnect 4WD-ECU <Vehicles without S-AWC> or
AWC-ECU <Vehicles with S-AWC> connector, and diagnose by using
the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Check the intermediate connector, and
repair if necessary. If the intermediate connector is in good condition,
repair the wiring harness between joint connector (CAN3) <LHD>
or joint connector (CAN4) <RHD> and the 4WD-ECU <Vehicles
without S-AWC> or AWC-ECU <Vehicles with S-AWC>
connector.
Check the 4WD-ECU <Vehicles
without S-AWC> or AWC-ECU <Vehicles with S-AWC>
connector, and repair if necessary. If the 4WD-ECU <Vehicles without
S-AWC> or AWC-ECU <Vehicles with S-AWC> connector is in
good condition, go to Step 23.
|
|
|
STEP 23. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the 4WD-ECU <Vehicles without S-AWC> or AWC-ECU <Vehicles
with S-AWC> connector, and repair if necessary. If the 4WD-ECU
<Vehicles without S-AWC> or AWC-ECU <Vehicles with
S-AWC> connector is in good condition, replace the 4WD-ECU
<Vehicles without S-AWC> or AWC-ECU <Vehicles with
S-AWC>.
|
|
|
|
|
|
STEP 24. Check the CAN-C between joint connector (CAN3)
<LHD> or joint connector (CAN4) <RHD> and the
column switch. Resistance measurement at joint connector (CAN3)
<LHD> or joint connector (CAN4)
<RHD>.
|
|
|
| note |
Step 24, 25 and 26 are only for vehicles with ASC.
On vehicles without it, go to Step 27.
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3) <LHD> or
joint connector (CAN4) <RHD>, and measure at the wiring harness
side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN3) terminal No.6
(CAN_H) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between joint connector (CAN3) terminal No.17
(CAN_L) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between joint connector (CAN4) terminal No.6
(CAN_H) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between joint connector (CAN4) terminal No.15
(CAN_L) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 27.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 25.
|
|
|
|
|
|
STEP 25. M.U.T.-III CAN bus diagnostics [column switch connector
disconnected]
|
|
|
(1)Disconnect column switch connector, and diagnose by using
the M.U.T.-III.
|
|
(2)Diagnose CAN-C, and check if M.U.T.-III
screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN3) <LHD> or joint connector (CAN4)
<RHD> and the column switch connector.
Check the column
switch connector, and repair if necessary. If the column switch connector
is in good condition, go to Step 26.
|
|
|
STEP 26. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the column switch connector, and repair if necessary. If the column switch
connector is in good condition, replace the column switch assembly
(steering wheel sensor).
|
|
|
|
|
|
STEP 27. Check the CAN-C between joint connector (CAN3)
<LHD> or joint connector (CAN4) <RHD> and the
FCM/LDW/AHB-ECU. Resistance measurement at joint connector (CAN3)
<LHD> or joint connector (CAN4)
<RHD>.
|
|
|
| note |
Step 27, 28 and 29 are only for vehicles with FCM.
On vehicles without it, go to Step 30.
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3) <LHD> or
joint connector (CAN4) <RHD>, and measure at the wiring harness
side.
|
|
|
(2)Disconnect 4WD-ECU <Vehicles without S-AWC> or
AWC-ECU <Vehicles with S-AWC> connector.
<4WD-RHD>
|
|
|
(3)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(4)Resistance between joint connector (CAN3) terminal No.7
(CAN_H) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between joint connector (CAN3) terminal No.18
(CAN_L) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between joint connector (CAN4) terminal No.9
(CAN_H) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(7)Resistance between joint connector (CAN4) terminal No.18
(CAN_L) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 30.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 28.
|
|
|
|
|
|
STEP 28. M.U.T.-III CAN bus diagnostics [FCM/LDW/AHB-ECU
connector disconnected]
|
|
|
(1)Disconnect FCM/LDW/AHB-ECU connector, and diagnose by
using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN3) <LHD> or joint connector (CAN4)
<RHD> and the FCM/LDW/AHB-ECU connector.
Check the
FCM/LDW/AHB-ECU connector, and repair if necessary. If the FCM/LDW/AHB-ECU
connector is in good condition, go to Step 29.
|
|
|
STEP 29. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the FCM/LDW/AHB-ECU connector, and repair if necessary. If the
FCM/LDW/AHB-ECU connector is in good condition, replace the
FCM/LDW/AHB-ECU.
|
|
|
|
|
|
STEP 30. Check the CAN-C between joint connector (CAN3)
<LHD> or joint connector (CAN4) <RHD> and the
SRS-ECU. Resistance measurement at joint connector (CAN3)
<LHD> or joint connector (CAN4)
<RHD>.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3) <LHD> or
joint connector (CAN4) <RHD>, and measure at the wiring harness
side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN3) terminal No.8
(CAN_H) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between joint connector (CAN3) terminal No.19
(CAN_L) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between joint connector (CAN4) terminal No.7
(CAN_H) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between joint connector (CAN4) terminal No.16
(CAN_L) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 33.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 31.
|
|
|
|
|
|
STEP 31. M.U.T.-III CAN bus diagnostics [SRS-ECU connector
disconnected]
|
|
|
(1)Disconnect SRS-ECU connector, and diagnose by using the
M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN3) <LHD> or joint connector (CAN4)
<RHD> and the SRS-ECU connector.
Check the SRS-ECU connector, and
repair if necessary. If the SRS-ECU connector is in good condition, go to
Step 32.
|
|
|
STEP 32. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the SRS-ECU connector, and repair if necessary. If the SRS-ECU connector is
in good condition, replace the SRS-ECU.
|
|
|
|
|
|
STEP 33. Check the CAN-C between joint connector (CAN3)
<LHD> or joint connector (CAN4) <RHD> and the
clearance warning control unit. Resistance measurement at joint connector
(CAN3) <LHD> or joint connector (CAN4)
<RHD>.
|
|
|
| note |
Step 33, 34 and 35 are only for vehicles with
ultrasonic misacceleration mitigation system/corner sensor system or
reversing sensor system. On vehicles without it, go to Step 36.
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3) <LHD> or
joint connector (CAN4) <RHD>, and measure at the wiring harness
side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN3) terminal No.3
(CAN_H) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between joint connector (CAN3) terminal No.14
(CAN_L) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between joint connector (CAN4) terminal No.2
(CAN_H) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between joint connector (CAN4) terminal No.11
(CAN_L) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 36.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 34.
|
|
|
|
|
|
STEP 34. M.U.T.-III CAN bus diagnostics [clearance warning
control unit connector disconnected]
|
|
|
(1)Disconnect clearance warning control unit connector, and
diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN3) <LHD> or joint connector (CAN4)
<RHD> and the clearance warning control unit
connector.
Check the clearance warning
control unit connector, and repair if necessary. If the clearance warning
control unit connector is in good condition, go to Step 35.
|
|
|
STEP 35. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the clearance warning control unit connector, and repair if necessary. If
the clearance warning control unit connector is in good condition, replace
the clearance warning control unit.
|
|
|
|
|
|
STEP 36. Check the CAN-C between joint connector (CAN3)
<LHD> or joint connector (CAN4) <RHD> and the
electric parking brake ECU. Resistance measurement at joint connector
(CAN3) <LHD> or joint connector (CAN4)
<RHD>.
|
|
|
| note |
Step 36, 37 and 38 are only for vehicles with
electric parking brake system. On vehicles without it, go to Step 39.
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3) <LHD> or
joint connector (CAN4) <RHD>, and measure at the wiring harness
side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN3) terminal No.1
(CAN_H) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between joint connector (CAN3) terminal No.12
(CAN_L) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between joint connector (CAN4) terminal No.3
(CAN_H) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between joint connector (CAN4) terminal No.12
(CAN_L) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 39.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 37.
|
|
|
|
|
|
STEP 37. M.U.T.-III CAN bus diagnostics [electric parking brake
ECU connector disconnected]
|
|
|
(1)Disconnect electric parking brake ECU connector, and
diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN3) <LHD> or joint connector (CAN4)
<RHD> and the electric parking brake ECU connector.
Check the electric
parking brake ECU connector, and repair if necessary. If the electric
parking brake ECU connector is in good condition, go to Step
38.
|
|
|
STEP 38. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the electric parking brake ECU connector, and repair if necessary. If the
electric parking brake ECU connector is in good condition, replace the
electric parking brake ECU.
|
|
|
|
|
|
STEP 39. Check the CAN-C between joint connector (CAN3)
<LHD> or joint connector (CAN4) <RHD> and the
gateway-ECU. Resistance measurement at joint connector (CAN3)
<LHD> or joint connector (CAN4)
<RHD>.
|
|
|
| note |
Step 39, 40 and 41 are only for vehicles with Blind
Spot Warning [BSW] (with Lane Change Assist) system. On
vehicles without it, go to Step 42.
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3) <LHD> or
joint connector (CAN4) <RHD>, and measure at the wiring harness
side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN3) terminal No.3
(CAN_H) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between joint connector (CAN3) terminal No.14
(CAN_L) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between joint connector (CAN4) terminal No.1
(CAN_H) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between joint connector (CAN4) terminal No.10
(CAN_L) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 42.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 40.
|
|
|
|
|
|
STEP 40. M.U.T.-III CAN bus diagnostics [gateway-ECU connector
disconnected]
|
|
|
(1)Disconnect gateway-ECU connector, and diagnose by using
the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN3) <LHD> or joint connector (CAN4)
<RHD> and the gateway-ECU connector.
Check the electric parking brake
ECU connector, and repair if necessary. If the gateway-ECU connector is in
good condition, go to Step 41.
|
|
|
STEP 41. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the gateway-ECU connector, and repair if necessary. If the gateway-ECU
connector is in good condition, replace the gateway-ECU.
|
|
|
|
|
|
STEP 42. Check the CAN-C between joint connector (CAN3)
<LHD> or joint connector (CAN4) <RHD> and the
diagnosis connector. Resistance measurement at joint connector (CAN3)
<LHD> or joint connector (CAN4)
<RHD>.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3) <LHD> or
joint connector (CAN4) <RHD>, and measure at the wiring harness
side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between joint connector (CAN3) terminal No.9
(CAN_H) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between joint connector (CAN3) terminal No.20
(CAN_L) and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between joint connector (CAN4) terminal No.8
(CAN_H) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between joint connector (CAN4) terminal No.17
(CAN_L) and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(7)
| caution |
Strictly observe the specified wiring harness repair
procedure.
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Repair the intermediate connector C-126, or the wiring harness between
joint connector (CAN3) <LHD> or joint connector (CAN4)
<RHD> and the intermediate connector C-126.
|
|
|
|
|
|
<Less than 1 kΩ >
Repair the diagnosis connector, or the wiring harness between joint
connector (CAN3) <LHD> or joint connector (CAN4)
<RHD> and the diagnosis connector.
|
|
|
|
|
|
STEP 43. M.U.T.-III CAN bus diagnostics [engine-ECU connector
disconnected]
|
|
|
(1)Disconnect engine-ECU connector, and diagnose by using the
M.U.T.-III.
|
|
(2)Diagnose CAN-C, and check if M.U.T.-III
screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
Go to Step
45.
Check
the engine-ECU connector, and repair if necessary. If the engine-ECU
connector is in good condition, go to Step 44.
|
|
|
STEP 44. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
|
|
|
|
|
|
Check
the engine-ECU connector, and repair if necessary. If the engine-ECU
connector is in good condition, replace the engine-ECU.
|
|
|
|
|
|
STEP 45. M.U.T.-III CAN bus diagnostics [ETACS-ECU connector
disconnected]
|
|
|
(1)Disconnect ETACS-ECU connector, and diagnose by using the
M.U.T.-III.
|
|
(2)Diagnose CAN-C, and check if M.U.T.-III
screen is as shown in the illustration.
| caution |
Strictly observe the specified wiring harness
repair procedure.
|
Q.
Does M.U.T.-III screen correspond to the illustration?
The trouble can be an intermittent
malfunction (Refer to GROUP 00 - How to Use
Troubleshooting/inspection Service Points - How to Cope with
Intermittent Malfunction).
Check the ETACS-ECU connector,
and repair if necessary. If the ETACS-ECU connector is in good condition,
go to Step 46.
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STEP 46. M.U.T.-III CAN bus diagnostics (retest the
system)
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Diagnose CAN-C, and check if M.U.T.-III screen
shows normal state.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/inspection Service Points - How to Cope
with Intermittent Malfunction).
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Check
the ETACS-ECU connector, and repair if necessary. If the ETACS-ECU
connector is in good condition, replace the ETACS-ECU.
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