Mitsubishi Colt Ralliart. Manual — part 371
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-228
INSPECTION PROCEDURE N-13: The 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 fog lamp switch is used to oper-
ate the fog lamps. If the signal is abnormal, the 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
ETACS-
ECU
FOG LAMP
SWITCH
Fog Lamp Switch Input Circuit
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
Main
Index
Group
TOC
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-229
DIAGNOSIS PROCEDURE
Step 1. Connector check: B-19 fog lamp switch
connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
Step 2. Check the fog lamp switch.
Refer to GROUP 54A
− 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 B-19 fog
lamp switch connector.
(1) Remove the fog lamp switch, and measure at the
wiring harness side.
(2) Resistance between B-19 fog lamp switch
connector terminal No.2 and body earth
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 4.
AC401055
Connector: B-19
AK
Harness side
AC401055
Connector: B-19
AK
Harness side
AC310506 DT
Connector B-19
(Harness side)
Main
Index
Group
TOC
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-230
Step 4. Check the wiring harness from B-19 fog
lamp switch connector terminal No.2 to body
earth.
• 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
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Repair the wiring harness.
Step 5. Connector check: B-133 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
Step 6. Check the wiring harness from B-133
ETACS-ECU connector No.58 to B-19 fog lamp
switch connector terminal No.1.
• 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 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
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Replace the ETACS-ECU.
AC401055
Connector: B-19
AK
Harness side
AC313826AC
B-133 (GR)
Connector: B-133
Harness side
Junction block (Rear view)
AC401055
Connector: B-19
AK
Harness side
AC313826AC
B-133 (GR)
Connector: B-133
Harness side
Junction block (Rear view)
Main
Index
Group
TOC
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-231
INSPECTION PROCEDURE N-14: The passenger's door 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 passenger's door switch is used
to operate the functions below. If the signal is abnor-
mal, these functions will not work normally.
• Power window timer
• Door-ajar warning lamp
POSSIBLE CAUSES
• Malfunction of the passenger's door switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Check the installation condition.
Check that the door switch (front: LH) is installed on
the body correctly.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Correct the installation condition.
Step 2. Connector check: C-19 door switch (front:
LH) connector.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
Step 3. Check the door switch (front: LH).
Refer to GROUP 42
− Door
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the door switch (front: LH).
ETACS-
ECU
DOOR SWITCH
(FRONT: LH)
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
Passenger's Door Switch Input Circuit
AC401059
Connector: C-19
AG
Harness side
Main
Index
Group
TOC
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