Diagnosis Item 11: Diagnose shorts in the earth to CAN-C-Mid.
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 A/C-ECU
- Malfunction of the KOS-ECU <Vehicles with KOS>
- Malfunction of the OSS-ECU <Vehicles with OSS>
- Malfunction of the CAN box unit <Vehicles with MMCS>
- Malfunction of the multivision display <Vehicles with
MMCS>
- Malfunction of the radio and CD player <Vehicles with 1CD audio or
display audio>
- Malfunction of the camera-ECU <Vehicles with multi around
monitor>
- Malfunction of the electric tailgate control unit <Vehicles with
electric tailgate>
- Malfunction of the combination meter
|
STEP 1. Check the CAN-C-Mid. Resistance measurement at ETACS-ECU
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-Mid that is defective.
|
|
|
(1)Disconnect combination meter connector and ETACS-ECU
connector, and measure the resistance at harness side of ETACS-ECU
connector.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
(3)Resistance between ETACS-ECU connector terminal No.17
(CAN_H) and body earth OK: 1 kΩ or
more
|
|
(4)Resistance between ETACS-ECU connector terminal No.16
(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 25.
|
|
|
|
<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-Mid between joint connector (CAN5) and the
ETACS-ECU. Resistance measurement at joint connector (CAN5).
|
|
caution |
A digital multimeter should be used.
|
|
|
caution |
The test wiring harness should be used.
|
|
|
(1)Disconnect joint connector (CAN5), 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 (CAN5) terminal No.11
(CAN_H) and body earth OK: 1 kΩ or
more
|
|
(4)Resistance between joint connector (CAN5) 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 3.
|
|
|
|
<Less than 1 kΩ >
Repair the wiring harness between joint connector (CAN5) and the ETACS-ECU
connector.
|
|
|
|
STEP 3. Check the CAN-C-Mid between joint connector (CAN5) and the
A/C-ECU. Resistance measurement at joint connector
(CAN5).
|
|
caution |
A digital multimeter should be used.
|
|
|
caution |
The test wiring harness should be used.
|
|
|
(1)Disconnect joint connector (CAN5), 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 (CAN5) terminal No.6
(CAN_H) and body earth OK: 1 kΩ or
more
|
|
(4)Resistance between joint connector (CAN5) 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 6.
|
|
|
|
<Less than 1 kΩ
> Go to Step 4.
|
|
|
|
STEP 4. M.U.T.-III CAN bus diagnostics [A/C-ECU connector
disconnected]
|
|
(1)Disconnect A/C-ECU connector, and diagnose by using
the M.U.T.-III.
|
![](../../../img/54/ACG01570AB00ENG.png)
|
(2)Diagnose CAN-C-Mid, 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 (CAN5) and the A/C-ECU connector.
Check the
A/C-ECU connector, and repair if necessary. If the A/C-ECU
connector is in good condition, go to Step 5.
|
|
STEP 5. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
Diagnose CAN-C-Mid, 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/C-ECU connector, and repair if necessary. If the A/C-ECU
connector is in good condition, replace the A/C-ECU.
|
|
|
|
STEP 6. Check the CAN-C-Mid between joint connector (CAN5) and the
electric tailgate control unit <Vehicles with electric
tailgate>. Resistance measurement at joint connector
(CAN5).
|
|
note |
Steps 6 to 8 are only for vehicles with electric
tailgate. On vehicles without it, go to Step 9 .
|
|
|
caution |
A digital multimeter should be used.
|
|
|
caution |
The test wiring harness should be used.
|
|
|
(1)Disconnect joint connector (CAN5), 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 (CAN5) terminal No.8
(CAN_H) and body earth OK: 1 kΩ or
more
|
|
(4)Resistance between joint connector (CAN5) 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 9.
|
|
|
|
<Less than 1 kΩ
> Go to Step 7.
|
|
|
|
STEP 7. M.U.T.-III CAN bus diagnostics [electric tailgate control
unit connector disconnected]
|
|
(1)Disconnect electric tailgate control unit connector, and
diagnose by using the M.U.T.-III.
|
![](../../../img/54/ACG01570AB00ENG.png)
|
(2)Diagnose CAN-C-Mid, 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 (CAN5) and the electric
tailgate control unit connector.
Check the electric tailgate
control unit connector, and repair if necessary. If the electric tailgate
control unit connector is in good condition, go to Step 8.
|
|
STEP 8. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
Diagnose CAN-C-Mid, 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 tailgate control unit connector, and repair if necessary. If
the electric tailgate control unit connector is in good condition, replace
the electric tailgate control unit.
|
|
|
|
STEP 9. Check the CAN-C-Mid between joint connector (CAN5) and the
camera-ECU <Vehicles with multi around monitor>. Resistance
measurement at joint connector (CAN5).
|
|
note |
Steps 9 to 11 are only for vehicles with multi
around monitor. On vehicles without it, go to Step 12 .
|
|
|
caution |
A digital multimeter should be used.
|
|
|
caution |
The test wiring harness should be used.
|
|
|
(1)Disconnect joint connector (CAN5), 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 (CAN5) terminal No.4
(CAN_H) and body earth <LHD> OK: 1 kΩ
or more
|
|
(4)Resistance between joint connector (CAN5) terminal No.15
(CAN_L) and body earth <LHD> OK: 1 kΩ
or more
|
|
(5)Resistance between joint connector (CAN5) terminal No.2
(CAN_H) and body earth <RHD> OK: 1 kΩ
or more
|
|
(6)Resistance between joint connector (CAN5) terminal No.13
(CAN_L) and body earth <RHD> OK: 1 kΩ
or more
|
|
Q.
Is the check result normal?
|
|
<1 kΩ or more>
Go to Step 12.
|
|
|
|
<Less than 1 kΩ
> Go to Step 10.
|
|
|
|
STEP 10. M.U.T.-III CAN bus diagnostics [camera-ECU connector
disconnected]
|
|
(1)Disconnect camera-ECU connector, and diagnose by using the
M.U.T.-III.
|
![](../../../img/54/ACG01570AB00ENG.png)
|
(2)Diagnose CAN-C-Mid, 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 (CAN5) and the camera-ECU connector.
Check the
camera-ECU connector, and repair if necessary. If the camera-ECU connector
is in good condition, go to Step 11.
|
|
STEP 11. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
Diagnose CAN-C-Mid, 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 camera-ECU connector, and repair if necessary. If the camera-ECU
connector is in good condition, replace the camera-ECU.
|
|
|
|
STEP 12. Check the CAN-C-Mid between joint connector (CAN5) and the
radio and CD player. Resistance measurement at joint connector
(CAN5).
|
|
note |
Steps 12 to 14 are only for vehicles with 1CD audio
or display audio. On vehicles without it, go to Step 15 .
|
|
|
caution |
A digital multimeter should be used.
|
|
|
caution |
The test wiring harness should be used.
|
|
|
(1)Disconnect joint connector (CAN5), 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 (CAN5) terminal No.7
(CAN_H) and body earth OK: 1 kΩ or
more
|
|
(4)Resistance between joint connector (CAN5) terminal No.18
(CAN_L) and body earth OK: 1 kΩ or
more
|
|
Q.
Is the check result normal?
|
|
<1 kΩ or more>
Go to Step 15.
|
|
|
|
<Less than 1 kΩ
> Go to Step 13.
|
|
|
|
STEP 13. M.U.T.-III CAN bus diagnostics [radio and CD player
connector disconnected]
|
|
(1)Disconnect radio and CD player connector, and diagnose by
using the M.U.T.-III.
|
![](../../../img/54/ACG01570AB00ENG.png)
|
(2)Diagnose CAN-C-Mid, 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 (CAN5) and the radio and CD player connector.
Check the radio
and CD player connector, and repair if necessary. If the radio and CD
player connector is in good condition, go to Step 14.
|
|
STEP 14. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
Diagnose CAN-C-Mid, 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 radio and CD player connector, and repair if necessary. If the radio
and CD player connector is in good condition, replace the radio and CD
player.
|
|
|
|
STEP 15. Check the CAN-C-Mid between joint connector (CAN5) and the CAN
box unit and multivision display. Resistance measurement at joint
connector (CAN5).
|
|
note |
Steps 15 to 17 are only for vehicles with MMCS. On
vehicles without it, go to Step 18 .
|
|
|
caution |
A digital multimeter should be used.
|
|
|
caution |
The test wiring harness should be used.
|
|
|
(1)Disconnect joint connector (CAN5), 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 (CAN5) terminal No.3
(CAN_H) and body earth <CAN box unit> OK: 1
kΩ or more
|
|
(4)Resistance between joint connector (CAN5) terminal No.14
(CAN_L) and body earth <CAN box unit> OK: 1
kΩ or more
|
|
(5)Resistance between joint connector (CAN5) terminal No.7
(CAN_H) and body earth <multivision
display> OK: 1 kΩ or more
|
|
(6)Resistance between joint connector (CAN5) terminal No.18
(CAN_L) and body earth <multivision
display> OK: 1 kΩ or more
|
|
Q.
Is the check result normal?
|
|
<1 kΩ or more>
Go to Step 18.
|
|
|
|
<Less than 1 kΩ
> Go to Step 16.
|
|
|
|
STEP 16. M.U.T.-III CAN bus diagnostics [CAN box unit connector
disconnected]
|
|
(1)Disconnect CAN box unit connector and multivision display
connector, and diagnose by using the M.U.T.-III.
|
![](../../../img/54/ACG01570AB00ENG.png)
|
(2)Diagnose CAN-C-Mid, 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 (CAN5) and the CAN box unit connector and multivision
display connector.
Check the CAN box unit connector
and multivision display connector, and repair if necessary. If the CAN box
unit connector and multivision display connector is in good condition, go
to Step 17.
|
|
STEP 17. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
Diagnose CAN-C-Mid, 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 CAN box unit connector and multivision display connector, and repair if
necessary. If the CAN box unit connector and multivision display connector
is in good condition, replace the CAN box unit and multivision
display.
|
|
|
|
STEP 18. Check the CAN-C-Mid between joint connector (CAN5) and the
OSS-ECU. Resistance measurement at joint connector (CAN5).
|
|
note |
Steps 18 to 20 are only for vehicles with OSS. On
vehicles without it, go to Step 21 .
|
|
|
caution |
A digital multimeter should be used.
|
|
|
caution |
The test wiring harness should be used.
|
|
|
(1)Disconnect joint connector (CAN5), 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 (CAN5) terminal No.10
(CAN_H) and body earth OK: 1 kΩ or
more
|
|
(4)Resistance between joint connector (CAN5) terminal No.21
(CAN_L) and body earth OK: 1 kΩ or
more
|
|
Q.
Is the check result normal?
|
|
<1 kΩ or more>
Go to Step 21.
|
|
|
|
<Less than 1 kΩ
> Go to Step 19.
|
|
|
|
STEP 19. M.U.T.-III CAN bus diagnostics [OSS-ECU connector
disconnected]
|
|
(1)Disconnect OSS-ECU connector, and diagnose by using the
M.U.T.-III.
|
![](../../../img/54/ACG01570AB00ENG.png)
|
(2)Diagnose CAN-C-Mid, 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 (CAN5) and the OSS-ECU connector.
Check the OSS-ECU connector, and
repair if necessary. If the OSS-ECU connector is in good condition, go to
Step 20.
|
|
STEP 20. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
Diagnose CAN-C-Mid, 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 OSS-ECU connector, and repair if necessary. If the OSS-ECU connector is
in good condition, replace the OSS-ECU.
|
|
|
|
STEP 21. Check the CAN-C-Mid between joint connector (CAN5) and the
KOS-ECU. Resistance measurement at joint connector (CAN5).
|
|
note |
Steps 21 to 23 are only for vehicles with KOS. 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 (CAN5), 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 (CAN5) terminal No.5
(CAN_H) and body earth OK: 1 kΩ or
more
|
|
(4)Resistance between joint connector (CAN5) 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 24.
|
|
|
|
<Less than 1 kΩ
> Go to Step 22.
|
|
|
|
STEP 22. M.U.T.-III CAN bus diagnostics [KOS-ECU connector
disconnected]
|
|
(1)Disconnect KOS-ECU connector, and diagnose by using the
M.U.T.-III.
|
![](../../../img/54/ACG01570AB00ENG.png)
|
(2)Diagnose CAN-C-Mid, 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 (CAN5) and the KOS-ECU connector.
Check the KOS-ECU connector, and
repair if necessary. If the KOS-ECU connector is in good condition, go to
Step 23.
|
|
STEP 23. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
Diagnose CAN-C-Mid, 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-ECU connector, and repair if necessary. If the KOS-ECU connector is
in good condition, replace the KOS-ECU.
|
|
|
|
STEP 24. Check the CAN-C-Mid between joint connector (CAN5) and the
combination meter. Resistance measurement at joint connector
(CAN5).
|
|
caution |
A digital multimeter should be used.
|
|
|
caution |
The test wiring harness should be used.
|
|
|
(1)Disconnect joint connector (CAN5), 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 (CAN5) terminal No.9
(CAN_H) and body earth OK: 1 kΩ or
more
|
|
(4)Resistance between joint connector (CAN5) terminal No.20
(CAN_L) and body earth OK: 1 kΩ or
more
|
|
(5)
caution |
Strictly observe the specified wiring harness repair
procedure.
|
|
|
Q.
Is the check result normal?
|
|
<1 kΩ or more>
Repair intermediate connector C-26.
|
|
|
|
<Less than 1 kΩ >
Repair the wiring harness between joint connector (CAN5) and the
combination meter connector.
|
|
|
|
STEP 25. 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.
|
![](../../../img/54/ACG01570AB00ENG.png)
|
(2)Diagnose CAN-C-Mid, 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
27.
Check
the combination meter connector, and repair if necessary. If the
combination meter connector is in good condition, go to Step
26.
|
|
STEP 26. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
Diagnose CAN-C-Mid, 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.
|
|
|
|
STEP 27. 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.
|
![](../../../img/54/ACG01570AB00ENG.png)
|
(2)Diagnose CAN-C-Mid, 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 28.
|
|
STEP 28. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
Diagnose CAN-C-Mid, 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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