Mitsubishi Grandis. Manual — part 117
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-465
Step 7. Retest the system.
Check that the hazard warning lamp switch signal is
received 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 ETACS-ECU.
Inspection Procedure Q-13: The rear fog lamp switch signal is not received.
CAUTION
Whenever the ECU is replaced, ensure that the
input signal circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
Input signal from the rear fog lamp switch is used to
operate the rear fog lamps. If the signal is abnormal,
the rear fog lamps will not illuminate and extinguish
normally.
POSSIBLE CAUSES
• Malfunction of the fog lamp switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
Rear Fog Lamp Switch Input Circuit
ETACS-
ECU
FOG LAMP
SWITCH
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
<RHD>
<LHD>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-466
DIAGNOSTIC PROCEDURE
Step 1. Connector check: C-130 fog lamp switch
connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
Step 2. Check the rear fog lamp switch.
Refer to GROUP 54A
− Rear fog lamp
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Replace the fog lamp switch.
Step 3. Resistance measurement at the C-130 fog
lamp switch connector.
(1) Remove the fog lamp switch, and measure at the
wiring harness side.
(2) Continuity between C-130 fog lamp switch
connector terminal No.6 and body earth
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 4.
AC312031
AF
1
5
6
4 3 2
Connector: C-130 <LHD>
Harness side
AC312043AF
1
5
6
4 3 2
Connector: C-130 <RHD>
Harness side
AC312031
AF
1
5
6
4 3 2
Connector: C-130 <LHD>
Harness side
AC312043AF
1
5
6
4 3 2
Connector: C-130 <RHD>
Harness side
AC312730AJ
Connector C-130
(Harness side)
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-467
Step 4. Check the wiring harness between C-130
fog lamp switch connector terminal No.6 and
body earth.
NOTE:
Prior to the wiring harness inspection, check joint
connector C-31 <RH drive vehicles>, and repair if
necessary.
• 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 5. Connector check: C-220 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
AC312031
AF
1
5
6
4 3 2
Connector: C-130 <LHD>
Harness side
AC312043AF
1
5
6
4 3 2
Connector: C-130 <RHD>
Harness side
AC312043AE
Connector: C-31 <RHD>
AC312037
Connector: C-220
Junction block (Rear view)
AC
<LHD>
Harness side
AC312047
Connector: C-220
Junction block (Rear view)
AC
<RHD>
Harness side
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-468
Step 6. Check the wiring harness between C-220
ETACS-ECU connector terminal No.21 and C-130
fog lamp switch connector terminal No.5.
• Check the input line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
Step 7. Retest the system.
Check that the rear fog lamp switch signal is
received 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 ETACS-ECU.
AC312037
Connector: C-220
Junction block (Rear view)
AC
<LHD>
Harness side
AC312047
Connector: C-220
Junction block (Rear view)
AC
<RHD>
Harness side
AC312031
AF
1
5
6
4 3 2
Connector: C-130 <LHD>
Harness side
AC312043AF
1
5
6
4 3 2
Connector: C-130 <RHD>
Harness side
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