Diagnosis Item
3: Diagnose shorts in the earth to CAN bus line <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 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 combination meter
- Malfunction of the transfer-ECU
- Malfunction of the A/C-ECU <Vehicles with automatic air
conditioner>
- Malfunction of the KOS&OSS-ECU <Vehicles with
KOS>
- Malfunction of the SRS-ECU
- Malfunction of the ABS-ECU <Vehicles with ABS>
- Malfunction of the A/T-ECU <A/T>
- Malfunction of the engine-ECU
|
STEP 1. Check the CAN bus lines. Resistance measurement
at diagnosis connector.
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
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. For details refer to .
|
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 27.
|
|
|
|
<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 line. Resistance measurement at joint connector
(CAN1) and the joint connector (CAN2). Resistance measurement at joint
connector (CAN1).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
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
|
|
Q.
Is the check result normal?
|
|
<1 kΩ or more>
Go to Step 13.
|
|
|
|
<Less than 1 kΩ
> Go to Step 3.
|
|
|
|
STEP 3. Check the CAN line between joint connector (CAN2) and the
engine-ECU. Resistance measurement at joint connector
(CAN2).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the
wiring harness side.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
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
|
|
Q.
Is the check result normal?
|
|
YES <Vehicles with KOS> : <1
kΩ or more> Go to Step 4.
|
|
|
|
YES <Vehicles without KOS (with
ABS)> :
<1 kΩ or more> Go to Step 7.
|
|
|
|
YES <Vehicles without KOS (without
ABS)> :
<1 kΩ or more> Go to Step 10.
|
|
|
|
NO : <Less than 1 kΩ > Repair
the wiring harness between joint
connector (CAN2) and the engine-ECU connector.
|
|
|
|
STEP 4. Check the CAN line between joint connector (CAN2) and the
KOS&OSS-ECU. Resistance measurement at joint connector
(CAN2).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the
wiring harness side.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
(3)Resistance between joint connector (CAN2) terminal No.8
(CAN_H) and body
earth OK: 1 kΩ or more
|
|
(4)Resistance between joint connector (CAN2) terminal No.19
(CAN_L) and body
earth OK: 1 kΩ or more
|
|
Q.
Is the check result normal?
|
|
YES <Vehicles with ABS> : <1
kΩ or more> Go to Step 7.
|
|
|
|
YES <Vehicles without ABS> : <1
kΩ or more> Go to Step 10.
|
|
|
|
<Less than 1 kΩ
> Go to Step 5.
|
|
|
|
STEP 5. 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.
|
![](../../../img/54/ACE00760AC00ENG.png)
|
(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 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 6.
|
|
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 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 7. Check the CAN line between joint connector (CAN2) and the
ABS-ECU. Resistance measurement at joint connector (CAN2).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the
wiring harness side.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
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?
|
|
<1 kΩ or more>
Go to Step 10.
|
|
|
|
<Less than 1 kΩ
> Go to Step 8.
|
|
|
|
STEP 8. M.U.T.-III CAN bus diagnostics [ABS-ECU connector
disconnected]
|
|
(1)Disconnect ABS-ECU connector, and diagnose by using the
M.U.T.-III.
|
![](../../../img/54/ACE00760AC00ENG.png)
|
(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 intermediate connector, and
repair if necessary. If the intermediate connector
is in good condition, repair the wiring harness between joint connector
(CAN2) and the ABS-ECU
connector.
Check the ABS-ECU connector, and
repair if necessary. If the ABS-ECU connector
is in good condition, go to Step 9.
|
|
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 ABS-ECU connector, and repair if necessary. If the ABS-ECU connector
is in good condition, replace the ABS-ECU (Refer to GROUP 35B -
Hydraulic unit ) <Vehicles
with ABS>).
|
|
|
|
STEP 10. Check the CAN line between joint connector (CAN2) and the
SRS-ECU. Resistance measurement at joint connector (CAN2).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the
wiring harness side.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
(3)Resistance between joint connector (CAN2) terminal No.7
(CAN_H) and body
earth OK: 1 kΩ or more
|
|
(4)Resistance between joint connector (CAN2) terminal No.18
(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 joint
connector (CAN2) and joint connector (CAN1).
|
|
|
|
<Less than 1 kΩ
> Go to Step 11.
|
|
|
|
STEP 11. 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.
|
![](../../../img/54/ACE00760AC00ENG.png)
|
(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 SRS-ECU connector.
Check the SRS-ECU connector, and
repair if necessary. If the SRS-ECU 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 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 13. Check CAN line between joint connector (CAN1) and the
ETACS-ECU.
Resistance measurement at joint connector (CAN1).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
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
|
|
(5)
caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
Q.
Is the check result normal?
|
|
YES <vehicles with A/C> : <1
kΩ or more> Go to Step 14.
|
|
|
|
YES <vehicles without A/C (A/T)> : <1
kΩ or more> Go to Step 17.
|
|
|
|
YES <vehicles without A/C (with
transfer-ECU) (M/T)> : <1 kΩ or
more> Go to Step 20.
|
|
|
|
YES <vehicles without A/C (without
transfer-ECU) (M/T)> : <1 kΩ or
more> Go to Step 23.
|
|
|
|
NO : <Less than 1 kΩ > Repair
the wiring harness between joint
connector (CAN1) and the ETACS-ECU connector.
|
|
|
|
STEP 14. Check the CAN line between joint connector (CAN1) and the
A/C-ECU. Resistance measurement at joint connector (CAN1).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
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
|
|
(5)
caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
Q.
Is the check result normal?
|
|
YES <A/T> : <1 kΩ or
more> Go to Step 17.
|
|
|
|
YES <M/T (Vehicles with
transfer-ECU)> : <1 kΩ or
more> Go to Step 20.
|
|
|
|
YES <M/T (Vehicles without
transfer-ECU)> : <1 kΩ or
more> Go to Step 23.
|
|
|
|
<Less than 1 kΩ
> Go to Step 15.
|
|
|
|
STEP 15. 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/ACE00760AC00ENG.png)
|
(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 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 16.
|
|
STEP 16. 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/C-ECU connector, and repair if necessary. If the A/C-ECU connector
is in good condition, replace the A/C-ECU (Refer to GROUP 55B -
Heater control unit ).
|
|
|
|
STEP 17. Check the CAN line between joint connector (CAN1) and the
A/T-ECU. Resistance measurement at joint connector (CAN1).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
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
|
|
(5)
caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
Q.
Is the check result normal?
|
|
YES <Vehicles with transfer-ECU> : <1
kΩ or more> Go to Step 20.
|
|
|
|
YES <Vehicles without
transfer-ECU> : <1 kΩ or
more> Go to Step 23.
|
|
|
|
<Less than 1 kΩ
> Go to Step 18.
|
|
|
|
STEP 18. 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.
|
![](../../../img/54/ACE00760AC00ENG.png)
|
(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 intermediate connector, and
repair if necessary. If the intermediate connector
is in good condition, repair the wiring harness between joint connector
(CAN1) 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 19.
|
|
STEP 19. 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 20. Check the CAN line between joint connector (CAN1) and the
transfer-ECU. Resistance measurement at joint connector
(CAN1).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
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.15
(CAN_L) and body
earth OK: 1 kΩ or more
|
|
(5)
caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
Q.
Is the check result normal?
|
|
<1 kΩ or more>
Go to Step 23.
|
|
|
|
<Less than 1 kΩ
> Go to Step 21.
|
|
|
|
STEP 21. 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.
|
![](../../../img/54/ACE00760AC00ENG.png)
|
(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 transfer-ECU
connector.
Check the transfer-ECU connector,
and repair if necessary. If the transfer-ECU
connector is in good condition, go to Step 22.
|
|
STEP 22. 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>
or GROUP 23A - Transfer-ECU <A/T>).
|
|
|
|
STEP 23. Check the CAN line between joint connector (CAN1) and the
combination meter. Resistance measurement at joint connector
(CAN1).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
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
|
|
(5)
caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
Q.
Is the check result normal?
|
|
<1 kΩ or more>
Go to Step 26.
|
|
|
|
<Less than 1 kΩ
> Go to Step 24.
|
|
|
|
STEP 24. 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/ACE00760AC00ENG.png)
|
(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 combination meter
connector.
Check the combination meter
connector, and repair if necessary. If the combination
meter connector is in good condition, go to Step 25.
|
|
STEP 25. 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, Combination meter ).
|
|
|
|
STEP 26. Check the CAN line between joint connector (CAN1) and the
diagnosis connector. Resistance measurement at joint connector
(CAN1).
|
|
caution |
A digital multimeter should be used. For details
refer to .
|
|
|
caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
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(2)
caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
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Ensure that the negative battery terminal is disconnected.
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(3)Resistance between joint connector (CAN1) terminal No.10
(CAN_H) and body
earth OK: 1 kΩ or more
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(4)Resistance between joint connector (CAN1) terminal No.21
(CAN_L) and body
earth OK: 1 kΩ or more
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(5)
caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
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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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<Less than 1 kΩ >
Repair the diagnosis connector, or the
wiring harness between joint connector (CAN1) and the diagnosis
connector.
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STEP 27. M.U.T.-III CAN bus diagnostics [engine-ECU connector
disconnected]
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(1)Disconnect engine-ECU connector and diagnose by using the
M.U.T.-III.
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![](../../../img/54/ACE00760AC00ENG.png)
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(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
29.
Check
the engine-ECU connector, and repair if necessary. If the engine-ECU
connector
is in good condition, go to Step 28.
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STEP 28. M.U.T.-III CAN bus diagnostics (retest the
system)
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Diagnose CAN bus lines, and check if M.U.T.-III
screen shows normal state.
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|
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 ).
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|
|
|
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 13A -
Engine-ECU <4G6> or
GROUP 13B - Engine-ECU <4D5>).
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STEP 29. 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.
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![](../../../img/54/ACE00760AC00ENG.png)
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(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 30.
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|
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 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 ).
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