Mitsubishi Grandis. Manual — part 196
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-246
"OK" is displayed for all the items :
Go to Step 2.
"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 "FRONT ECU" menu. :
Refer to Inspection Procedure A-4
"Communication with the front-ECU is not
possible
Step 2. SWS monitor data list.
Check the SWS communication signal, which are
related to the headlamp washer function.
<Selected item> HD WASHER
• Turn the ignition switch to the ACC position.
• Headlamp washer switch: ON
OK: Normal conditions are displayed for all
the items.
Q: Are the check result normal?
Normal conditions are displayed for all the items :
Go to Step 3.
Normal condition is not displayed for item No.16 :
Replace the column switch.
Normal condition is not displayed for item No.31 :
Refer to inspection procedure Q-1 "The
ignition switch (ACC) signal is not received
Normal condition is not displayed for item No.70 :
Replace the front-ECU.
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.
Item No.
Item name
Normal
condition
Item 16
HD WASHER SW ON
Item 31
IG SW (ACC)
ON
Item 70
FRONT ECU ACK NORMAL ACK
or HI-BEAM
ACK
AC310401
Connector : A-31 <LHD>
AH
A-31(GR)
Harness side
AC310396
Connector : A-31 <RHD>
AH
A-31(GR)
Harness side
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-247
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.
Step 6. Connector check: A-40 earth connector.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the connector.
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
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) USING SWS MONITOR
54C-248
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.
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.
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)
AC311521AB
Connector: A-14X
Relay box side
AC311521AB
Connector: A-14X
Relay box side
AC310507CB
Connector A-14X
(Harness side)
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-249
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.
Step 11. Check the wiring harness between A-31
headlamp washer motor connector terminal No.1
and A-14X front-ECU connector terminal No.11.
• Check the output line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 12.
NO :
Repair the wiring harness.
Step 12. Retest the system.
The headlamp washer should now work normally.
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 :
Replace the front-ECU.
AC311521AB
Connector: A-14X
Relay box side
AC311521AB
Connector: A-14X
Relay box side
AC310401
Connector : A-31 <LHD>
AH
A-31(GR)
Harness side
AC310396
Connector : A-31 <RHD>
AH
A-31(GR)
Harness side
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