Mitsubishi Grandis. Manual — part 62
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-245
HEADLAMP WASHER
Inspection Procedure I-1: The headlamp washer does not work.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
The headlamp washer motor, the column switch or
the front-ECU may be defective.
POSSIBLE CAUSES
• Malfunction of the headlamp washer motor
• Malfunction of the column switch
• Malfunction of the front-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. MUT-III diagnosis code
When the ignition switch is turned to the LOCK
(OFF) position, check that the ETACS-ECU does not
set the diagnosis code.
Q: Is the diagnosis code set?
YES :
Refer to diagnosis code chart
.
NO :
Go to Step 2.
FRONT-ECU
HEADLAMP
WASHER MOTOR
INPUT SIGNAL
HEADLAMP WASHER
Wire colour code
B : Black LG : Light green G : Green L : Blue
W : White Y : Yellow SB : Sky blue BR : Brown
O : Orange GR : Gray R : Red P : Pink V : Violet
FUSIBLE
LINK
5
HEADLAMP
WASHER
Headlamp Washer Motor Circuit
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-246
Step 2. Pulse check
Check the input signals below which are related to
the windshield wiper.
OK: The MUT-III sounds or the voltmeter
needle fluctuates.
Q: Are the check result normal?
All the signals are received normally :
Go to Step
The ignition switch (ACC) signal is not received. :
Refer to inspection procedure Q-1 "The
ignition switch (ACC) signal is not received
Headlamp washer switch signal is not received. :
Refer to inspection procedure Q-6 "The
column switch (headlamp washer switch)
signal is not received
Step 3. Connector check: A-31 headlamp washer
motor connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the connector.
Step 4. Check the headlamp washer motor
assembly.
Refer to GROUP 51
− Headlamp washer
Q: Is the check result normal?
YES :
Go to Step 5
NO :
Replace the headlamp washer motor.
Step 5. Resistance measurement at the A-31
headlamp washer motor connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Continuity between A-31 headlamp washer motor
connector terminal No.2 and body earth
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Go to Step 6.
System switch
Check condition
Ignition switch (ACC)
When turned from the
LOCK (OFF) position to
the ACC position.
Headlamp washer switch When the switch is
turned from off to on.
AC310401
Connector : A-31 <LHD>
AH
A-31(GR)
Harness side
AC310396
Connector : A-31 <RHD>
AH
A-31(GR)
Harness side
AC310401
Connector : A-31 <LHD>
AH
A-31(GR)
Harness side
AC310396
Connector : A-31 <RHD>
AH
A-31(GR)
Harness side
AC310506
AC310506
Connector A-31
(Harness side)
BP
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-247
Step 6. Connector check: A-40 earth connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the connector.
Step 7. Check the wiring harness between A-31
headlamp washer motor connector terminal No.2
and A-40 earth connector terminal No.2.
• Check the earth wires for open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Repair the wiring harness.
AC310401
Connector: A-40 <LHD>
Harness side
AE
A-40 (GR)
AC310396
Connector: A-40 <RHD>
Harness side
AE
A-40 (GR)
AC310401
Connector : A-31 <LHD>
AH
A-31(GR)
Harness side
AC310396
Connector : A-31 <RHD>
AH
A-31(GR)
Harness side
AC310401
Connector: A-40 <LHD>
Harness side
AE
A-40 (GR)
AC310396
Connector: A-40 <RHD>
Harness side
AE
A-40 (GR)
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-248
Step 8. Connector check: A-14X front-ECU
connector.
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Repair the connector.
Step 9. Voltage measurement at the A-14X
front-ECU connector.
(1) Remove the front-ECU, and measure at the
junction block side.
(2) Ignition switch: ACC
(3) Check the voltage between the A-14X front-ECU
connector terminal No.9 and body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 11.
NO :
Go to Step 10.
Step 10. Check the wiring harness between
A-14X front-ECU connector terminal No.9 and the
fusible link (5).
• Check the power supply line for open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Repair the wiring harness.
AC311521AB
Connector: A-14X
Relay box side
AC311521AB
Connector: A-14X
Relay box side
AC310507CB
Connector A-14X
(Harness side)
AC311521AB
Connector: A-14X
Relay box side
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