Diagnosis Item
3: Diagnose shorts in the earth to CAN bus line (MAIN). <Vehicles for
LHD>
| 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.
|
TROUBLE JUDGEMENT CONDITIONS
The M.U.T.-III judges the trouble
when it is impossible to receive the periodically sent
data and the resistance 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 combination meter
- Malfunction of the gateway-ECU <Vehicles with automatic A/C, 4WD
and 5M/T>
- Malfunction of the transfer-ECU <Vehicles with 4WD>
- Malfunction of the steering wheel sensor <Vehicles with
ASTC>
- Malfunction of the KOS&OSS-ECU <Vehicles with keyless
operation
system>
- Malfunction of the SRS-ECU
- Malfunction of the ABS-ECU <Vehicles without ASTC> or
ASTC-ECU <Vehicles
with ASTC>
- Malfunction of the A/T-ECU <Vehicles with A/T>
- Malfunction of the engine-ECU
- Malfunction of the electric parking brake-ECU
- Malfunction of the clearance warning control unit <Vehicles with
ultrasonic
misacceleration mitigation, blind spot warning or corner sensor
system>
- FCM-ECU <Vehicles with forward collision mitigation
system>
- e-Call control unit <Vehicles for RUSSIA>
|
|
STEP 1. Check the CAN bus lines. 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
bus line 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.
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|
|
|
STEP 2. Check the CAN line. Resistance measurement at joint connector
(CAN2) and the joint connector (CAN1). 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.9
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.20
(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 3.
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|
|
|
|
STEP 3. Check the CAN line between joint connector (CAN2) and the
ETACS-ECU. Resistance measurement at joint connector (CAN2).
|
|
|
| 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.11
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN2) terminal No.22
(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 4.
|
|
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|
|
|
NO : <Less than 1 kΩ > Repair
the wiring harness between joint
connector (CAN2) and the ETACS-ECU connector.
|
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|
|
|
|
STEP 4. Check the CAN line between joint connector (CAN1) and the
combination meter. Resistance measurement at joint connector
(CAN2).
|
|
|
| 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.5
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN2) terminal No.16
(CAN_L) and body
earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
YES : <1 kΩ or
more> Go to Step 7.
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|
|
|
|
|
<Less than 1 kΩ
> Go to Step 5.
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|
|
|
|
STEP 5. M.U.T.-III CAN bus diagnostics [combination meter
connector
disconnected]
|
|
|
(1)Disconnect combination meter 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.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN2) and the combination meter
connector.
Check the combination meter
connector, and repair if necessary. If the combination
meter connector is in good condition, go to Step 6.
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|
|
STEP 6. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 combination meter connector, and repair if necessary. If the
combination
meter connector is in good condition, replace the combination meter (Refer
to GROUP 54A - Combination
Meter).
|
|
|
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|
STEP 7. Check the CAN line between joint connector (CAN1) and the
transfer-ECU. Resistance measurement at joint connector
(CAN2).
|
|
|
| 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.4
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN2) 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 10.
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|
|
|
|
|
<Less than 1 kΩ
> Go to Step 8.
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|
|
|
|
STEP 8. M.U.T.-III CAN bus diagnostics [transfer-ECU connector
disconnected]
|
|
|
(1)Disconnect transfer-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.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN2) and the transfer-ECU
connector.
Check the transfer-ECU connector,
and repair if necessary. If the transfer-ECU
connector is in good condition, go to Step 9.
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|
|
STEP 9. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 transfer-ECU connector, and repair if necessary. If the transfer-ECU
connector is in good condition, replace the transfer-ECU (Refer to GROUP
22A - Transfer-ECU  <M/T>,
GROUP 23A - Transfer-ECU <A/T>).
|
|
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|
|
STEP 10. Check the CAN line between joint connector (CAN1) and the
steering wheel sensor. Resistance measurement at joint connector
(CAN2).
|
|
|
| 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.6
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN2) terminal No.17
(CAN_L) and body
earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 13.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 11.
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|
|
|
|
|
STEP 11. M.U.T.-III CAN bus diagnostics [Steering wheel sensor
connector disconnected]
|
|
|
(1)Disconnect steering wheel sensor 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.
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 (CAN2) and
the steering wheel sensor connector.
Check the steering wheel sensor
connector, and repair if necessary. If the steering
wheel sensor connector is in good condition, go to Step 12.
|
|
|
STEP 12. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 steering wheel sensor connector, and repair if necessary. If the
steering
wheel sensor connector is in good condition, replace the column switch
(integrated with steering
wheel sensor) (Refer to GROUP 54A - Column Switch).
|
|
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|
STEP 13. Check the CAN line between joint connector (CAN2) and the
A/T-ECU. Resistance measurement at joint connector (CAN2).
|
|
|
| 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.1
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN2) terminal No.12
(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 16.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 14.
|
|
|
|
|
|
STEP 14. M.U.T.-III CAN bus diagnostics [A/T-ECU connector
disconnected]
|
|
|
(1)Disconnect A/T-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.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN2) and the A/T-ECU connector.
Check the A/T-ECU connector, and
repair if necessary. If the A/T-ECU connector
is in good condition, go to Step 15.
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|
|
STEP 15. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 A/T-ECU connector, and repair if necessary. If the A/T-ECU connector
is in good condition, replace the A/T-ECU (Refer to GROUP 23A -
A/T-ECU).
|
|
|
|
|
|
STEP 16. Check the CAN line between joint connector (CAN2) and the
diagnosis connector. Resistance measurement at joint connector
(CAN2).
|
|
|
| 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.10
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN2) terminal No.21
(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 joint connector (CAN2).
|
|
|
|
|
|
<Less than 1 kΩ>
Repair the diagnosis connector, or the
wiring harness between joint connector (CAN2) and the diagnosis
connector.
|
|
|
|
|
|
STEP 17. Check the CAN line. Resistance measurement at D-25
intermediate
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect 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 D-25 intermediate connector terminal
No.19 (CAN_H)
and body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-25 intermediate connector terminal
No.18 (CAN_L)
and body earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
YES : <1 kΩ or
more> Go to Step 22.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 18.
|
|
|
|
|
|
STEP 18. Check the CAN line between joint connector (CAN3) and the
engine-ECU. Resistance measurement at joint connector
(CAN3).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3), 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
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN3) terminal No.22
(CAN_L) and body
earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
YES : <1 kΩ or
more> Go to Step 19.
|
|
|
|
|
|
NO : <Less than 1 kΩ > Repair
the wiring harness between joint
connector (CAN3) and the engine-ECU connector.
|
|
|
|
|
|
STEP 19. Check the CAN line between joint connector (CAN3) and the
FCM-ECU. Resistance measurement at joint connector (CAN3).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3), 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
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN3) 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 D-25
intermediate connector and the joint connector (CAN3).
|
|
|
|
|
|
NO : <Less than 1 kΩ
> Go to Step 20.
|
|
|
|
|
|
STEP 20. M.U.T.-III CAN bus diagnostics [FCM-ECU connector
disconnected]
|
|
|
(1)Disconnect FCM-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.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN3) and the FCM-ECU connector.
Check the FCM-ECU connector, and
repair if necessary. If the FCM-ECU connector
is in good condition, go to Step 21.
|
|
|
STEP 21. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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-ECU connector, and repair if necessary. If the FCM-ECU connector
is in good condition, replace the FCM-ECU (Refer to GROUP 35C -
FCM-ECU).
|
|
|
|
|
|
STEP 22. Check the CAN line between joint connector (CAN1) and the
SRS-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.7
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.18
(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 25.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 23.
|
|
|
|
|
|
STEP 23. 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.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) 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 24.
|
|
|
STEP 24. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 (Refer to GROUP 52B -
SRS-ECU).
|
|
|
|
|
|
STEP 25. Check the CAN line between joint connector (CAN1) and the
KOS&OSS-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.8
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.19
(CAN_L) and body
earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 28.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 26.
|
|
|
|
|
|
STEP 26. M.U.T.-III CAN bus diagnostics [KOS&OSS-ECU
connector
disconnected]
|
|
|
(1)Disconnect KOS&OSS-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.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) and the KOS&OSS-ECU
connector.
Check the KOS&OSS-ECU
connector, and repair if necessary. If the KOS&OSS-ECU
connector is in good condition, go to Step 27.
|
|
|
STEP 27. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 KOS&OSS-ECU connector, and repair if necessary. If the
KOS&OSS-ECU
connector is in good condition, replace the KOS&OSS-ECU (Refer to
GROUP 42B - KOS&OSS-ECU).
|
|
|
|
|
|
STEP 28. Check the CAN line between joint connector (CAN1) and the
ABS-ECU or ASTC-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.5
(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
|
|
|
Q.
Is the check result normal?
|
|
|
YES : <1 kΩ or
more> Go to Step 31.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 29.
|
|
|
|
|
|
STEP 29. M.U.T.-III CAN bus diagnostics [ABS-ECU or ASTC-ECU
connector disconnected]
|
|
|
(1)Disconnect ABS-ECU or ASTC-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.
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 (CAN1) and
the ABS-ECU or ASTC-ECU connector.
Check the ABS-ECU or ASTC-ECU
connector, and repair if necessary. If the ABS-ECU
or ASTC-ECU connector is in good condition, go to Step 30.
|
|
|
STEP 30. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 or ASTC-ECU connector, and repair if necessary. If the ABS-ECU
or ASTC-ECU connector is in good condition, replace the ABS-ECU (Refer to
GROUP 35B - Hydraulic
Unit) or ASTC-ECU (Refer to GROUP 35C - Hydraulic Unit).
|
|
|
|
|
|
STEP 31. Check the CAN line between joint connector (CAN1) and the
electric parking brake-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.2
(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 34.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 32.
|
|
|
|
|
|
STEP 32. 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.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) 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
33.
|
|
|
STEP 33. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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
(Refer to GROUP 36 - Electric Parking Brake-ECU).
|
|
|
|
|
|
STEP 34. Check the CAN line between joint connector (CAN1) and the
clearance warning control unit. 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.8
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.19
(CAN_L) and body
earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 37.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 35.
|
|
|
|
|
|
STEP 35. 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.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) 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 36.
|
|
|
STEP 36. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 (Refer to GROUP 54A - Unintended Acceleration Mitigation
System/Blind Spot
Warning/Corner Sensor System, Clearance Warning Control Unit).
|
|
|
|
|
|
STEP 37. Check the CAN line between joint connector (CAN1) and the
gateway-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.11
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.22
(CAN_L) and body
earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 40.
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 38.
|
|
|
|
|
|
STEP 38. 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.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) and the gateway-ECU connector.
Check the
gateway-ECU connector, and repair if necessary. If the gateway-ECU
connector
is in good condition, go to Step 39.
|
|
|
STEP 39. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 40. Check the CAN line between joint connector (CAN1) and the
e-Call control unit. 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.1
(CAN_H) and body
earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between joint connector (CAN1) terminal No.12
(CAN_L) and body
earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Repair the wiring harness between D-25
intermediate connector and the joint connector (CAN1).
|
|
|
|
|
|
<Less than 1 kΩ
> Go to Step 41.
|
|
|
|
|
|
STEP 41. M.U.T.-III CAN bus diagnostics [e-Call control unit
connector
disconnected]
|
|
|
(1)Disconnect e-Call 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.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) and the e-Call control
unit connector.
Check the e-Call control unit
connector, and repair if necessary. If the e-Call
control unit connector is in good condition, go to Step 42.
|
|
|
STEP 42. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 e-Call control unit connector, and repair if necessary. If the e-Call
control unit connector is in good condition, replace the e-Call control
unit (Refer to GROUP
54A - Era-Glonass System, e-Call Control Unit ).
|
|
|
|
|
|
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 bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
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 bus lines, 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 (Refer to GROUP 13B -
Engine-ECU <6B31>,
GROUP 13C - Engine-ECU <4N15> or GROUP 13E -
Engine-ECU <4D56>).
|
|
|
|
|
|
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 bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
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.
|
|
|
STEP 46. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, 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 ETACS-ECU connector, and repair if necessary. If the ETACS-ECU
connector
is in good condition, replace the ETACS-ECU (Refer to GROUP 54A -
ETACS, ETACS-ECU).
|
|
|
|