Mitsubishi Grandis. Manual — part 143
DIAGNOSTIC TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-34
YES :
If a trouble is solved, it is determined that
there is an intermittent malfunction such as
poor engaged connector(s) or open circuit
(Refer to GROUP 00
− How to use
troubleshooting/Inspection Service Points
).
NO :
Go to Step 3.
Step 3. ECU check by using the SWS monitor
Check that the power supply and earth lines to the
ETACS-ECU and the column switch (column-ECU)
and the SWS communication lines are normal.
• Ignition switch: OFF
ECUS TO BE CHECKED
• Column ECU
• ETACS ECU
OK: "OK" is displayed for all the items
Q: Are the check result normal?
Normal conditions are displayed for all the items. :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
"NG" is displayed on the "COLUMN ECU" menu. :
Refer to Inspection Procedure A-2
"Communication with the column switch
(column-ECU) is not possible
."
"NG" is displayed on the "ETACS ECU" menu. :
Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible
Diagnosis code No.03 Communication error with front-ECU
CAUTION
If diagnosis code No.03 is set in the ETACS-ECU,
diagnose the CAN bus lines.
TROUBLE JUDGMENT
The ETACS-ECU communicates with the front-ECU
through the SWS communication line. If there is any
trouble in that communication, diagnosis code No.03
will be set.
COMMENTS ON TROUBLE SYMPTOM
The front-ECU, the ETACS-ECU, connector(s), or
wiring harness between the two may be defective.
POSSIBLE CAUSES
• Malfunction of the front-ECU
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. MUT-III CAN bus diagnostics
Use the MUT-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
Step 2. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
If a trouble is solved, it is determined that
there is an intermittent malfunction such as
poor engaged connector(s) or open circuit
(Refer to GROUP 00
− How to use
troubleshooting/Inspection Service Points
).
NO :
Go to Step 3.
Step 3. ECU check by using the SWS monitor
Check that the power supply and earth lines to the
ETACS-ECU and the front-ECU and the SWS
communication lines are normal.
• Ignition switch: OFF
ECUS TO BE CHECKED
• Front ECU
• ETACS ECU
OK: "OK" are displayed for all the items
Q: Are the check result normal?
DIAGNOSTIC TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-35
Normal conditions are displayed for all the items. :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
"NG" is displayed on the "FRONT ECU" menu. :
Refer to Inspection Procedure A-4
"Communication with the front-ECU is not
possible
"NG" is displayed on the "ETACS ECU" menu. :
Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible
Diagnosis code No.04 Communication error with sunroof-ECU
CAUTION
If diagnosis code No.04 is set in the ETACS-ECU,
diagnose the CAN bus lines.
TROUBLE JUDGMENT
The ETACS-ECU communicates with the sunroof
motor assembly (sunroof-ECU) through the SWS
communication line. If there is any trouble in that
communication, diagnosis code No.04 will be set.
NOTE: For vehicles without sunroof, diagnosis code
No.04 does not mean that there is a problem.
COMMENTS ON TROUBLE SYMPTOM
The sunroof motor assembly (sunroof-ECU), the
ETACS-ECU, connector(s), or wiring harness
between the two may be defective.
POSSIBLE CAUSES
• Malfunction of the sunroof motor assembly
(sunroof-ECU)
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. MUT-III CAN bus diagnostics
Use the MUT-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
Step 2.Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
If a trouble is solved, it is determined that
there is an intermittent malfunction such as
poor engaged connector(s) or open circuit
(Refer to GROUP 00
− How to use
troubleshooting/Inspection Service Points
).
NO :
Go to Step 3.
Step 3. ECU check by using the SWS monitor
Check that the power supply and earth lines to the
ETACS-ECU and the sunroof motor assembly
(sunroof-ECU) and the SWS communication lines
are normal.
• Ignition switch: OFF
ECUS TO BE CHECKED
• Sunroof ECU
• ETACS ECU
OK: "OK" are displayed for all the items
Q: Are the check result normal?
DIAGNOSTIC TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-36
Normal conditions are displayed for all the items. :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
"NG" is displayed on the "SUNROOF ECU" menu. :
Refer to Inspection Procedure A-6
"Communication with the sunroof motor
assembly (sunroof-ECU) is not possible
."
"NG" is displayed on the "ETACS ECU" menu. :
Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible
Diagnosis code No.05 Communication error with power window main switch
CAUTION
If diagnosis code No.05 is set in the ETACS-ECU,
diagnose the CAN bus lines.
TROUBLE JUDGMENT
The ETACS-ECU communicates with the power
window main switch through the SWS
communication lines. If there is any trouble in that
communication, diagnosis code No.05 will be set.
COMMENTS ON TROUBLE SYMPTOM
If the power window main switch, the ETACS-ECU or
the CAN bus line fails, this diagnosis code will be set.
POSSIBLE CAUSES
• Malfunction of the power window main switch
• Malfunction of the ETACS-ECU switch
• Malfunction of the CAN bus
DIAGNOSIS PROCEDURE
Step 1. MUT-III CAN bus diagnostics
Use the MUT-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
Step 2. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the diagnosis code set?
YES :
Go to Step 3.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
Step 3. ECU check by using the SWS monitor
Check that the power supply and earth lines to the
ETACS-ECU and the power window main switch
(power window module) and the SWS
communication lines are normal.
• Ignition switch: ON
ECUS TO BE CHECKED
• P/W MODULE
• ETACS ECU
OK: "OK" are displayed for all the items
Q: Are the check result normal?
Normal conditions are displayed for all the items. :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
"NG" is displayed on the "P/W MODULE" menu. :
Refer to Inspection Procedure A-5
"Communication with the power window
main switch (power window module) is not
possible
"NG" is displayed on the "ETACS ECU" menu. :
Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible
DIAGNOSTIC TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-37
Diagnosis code No.10 Bus off
CAUTION
If diagnosis code No.10 is set in the ETACS-ECU,
diagnose the CAN bus lines.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
TROUBLE JUDGMENT
Diagnosis code No.10 will be stored when the
ETACS-ECU ceases CAN communication (bus off)
and then resumes the communication by turning the
ignition switch to the "LOCK" (OFF) position.
COMMENTS ON TROUBLE SYMPTOM
The wiring harness wire or connectors may have
loose, corroded, or damage terminals, or terminals
pushed back in the connector, or the SWS
communication lines may be defective.
POSSIBLE CAUSES
Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. MUT-III CAN bus diagnostics
Use the MUT-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
go to Step 3.
Step 2. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
If a trouble is solved, it is determined that
there is an intermittent malfunction such as
poor engaged connector(s) or open circuit
(Refer to GROUP 00
− How to use
troubleshooting/Inspection Service Points
).
NO :
Replace the ETACS-ECU, and then go to
Step 3.
Step 3. Check whether the diagnosis code is
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) Check if the diagnosis code is set.
Q: Is the check result normal?
YES :
The procedure is complete.
NO :
Return to Step 1.
Diagnosis code No.11 Engine-A/T-ECU time-out (related to engine)
CAUTION
If diagnosis code No.11 is set in the ETACS,
diagnose the CAN main bus line.
CAUTION
Whenever the ECU is replaced, ensure that the
communication circuit is normal.
TROUBLE JUDGMENT
• The ETACS-ECU receives engine and
transmission control signals from the
engine-A/T-ECU <A/T> or the engine-ECU
<M/T> through the CAN bus lines. If the ECU can
not receive the engine control system-related
signal at all, diagnosis code No.11 will be set.
COMMENTS ON TROUBLE SYMPTOM
Current trouble
• Connector(s) or wiring harness in the CAN bus
lines between the ETACS-ECU and the
engine-A/T-ECU <A/T> or the engine-ECU
<M/T>, the power supply circuits to these ECUs,
or the ETACS-ECU itself may be defective.
Past trouble
• If diagnosis code No.11 is set as past trouble,
carry out diagnosis with particular emphasis on
wiring and connector(s) in the CAN bus lines
between the ETACS-ECU and the
engine-A/T-ECU <A/T> or the engine-ECU
<M/T>, or power supply to the engine-A/T-ECU
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