Mitsubishi Colt Ralliart. Manual — part 353

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-156

FOG LAMP

INSPECTION PROCEDURE K-1: The fog lamps do not illuminate normally.

CAUTION

Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

If the fog lamps do not illuminate normally, the input
signal circuit(s) below or the ETACS-ECU may be
defective.

• Tail lamp switch

• Headlamp switch

• Fog lamp switch

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the fog lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check that the tail/stop lamps and
headlamps operate.
Check that the tail/stop lamps and headlamps illumi-
nate normally.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the tail/stop lamp(s) and
headlamp(s). Refer to trouble symptom
chart

P.54B-35

.

Fog Lamp Relay 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

ETACS-ECU

FOG LAMP
RELAY

FOG LAMP

FUSIBLE
LINK

6

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-157

Step 2. Pulse check
Check the input signals below, which are related to
the fog lamps.

OK: The M.U.T.-III sounds or the voltmeter
needle fluctuates.

Q: Is the check result normal?

All the signals are received normally. :

Go to Step

3.

The ignition switch (IG1) signal is not received. :

Refer to Inspection Procedure N-2 "The
ignition switch (IG1) signal is not received

P.54B-202

."

The tail lamp switch signal is not received. :

Refer

to Inspection Procedure N-4 "The column
switch (lighting and turn-signal lamp switch)
signal is not received

P.54B-206

."

The headlamp switch signal is not received. :

Refer to Inspection Procedure N-4 "The
column switch (lighting and turn-signal lamp
switch) signal is not received

P.54B-206

."

The fog lamp switch signal is not received. :

Refer

to Inspection Procedure N-13 "The fog lamp
switch signal is not received

P.54B-228

."

Step 3. Connector check: B-115 fog lamp relay
connector

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the defective connector.

Step 4. Check the fog lamp relay.
Refer to GROUP 54A

− Fog lamp

P.54A-79

.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Replace the fog lamp relay.

System switch

Check condition

Ignition switch (IG1)

When turned from ACC
to ON

Tail lamp switch

When the lighting switch
is turned to the TAIL
position

Headlamp switch

When the lighting switch
is turned to the HEAD
position

Fog lamp switch

When the fog lamp
switch is turned from off
to on

AC313824 AH

Connector: B-115

Junction block side

Junction block (Front view)

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-158

Step 5. Voltage measurement at the B-115 fog
lamp relay connector.

(1) Remove the fog lamp relay, and measure at the

junction block side.

(2) Check the voltage between the fog lamp relay

connector and body earth.

• Voltage between B-115 fog lamp relay con-

nector terminal No.1 and body earth

• Voltage between B-115 fog lamp relay con-

nector terminal No.3 and body earth

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Go to Step 6.

Step 6. Check the wiring harness between B-115
fog lamp relay connector terminals Nos.1 and 3
to the fusible link (6).

NOTE: Prior to the wiring harness inspection, check
junction block connector B-108, and repair if neces-
sary.

• Check the power supply line for open circuit.

Q: Is the check result normal?

YES :

Go to Step 9.

NO :

Repair the wiring harness.

Step 7. Connector check: B-133 ETACS-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Repair the defective connector.

AC313824 AH

Connector: B-115

Junction block side

Junction block (Front view)

AC310507 FF

Connector B-115
(Junction block side)

AC313825

Connectors: B-108, B-115

AG

B-115

B-115

B-108 (B)

B-108

Junction block (Front view)

Harness side

Junction block side

AC313826AC

B-133 (GR)

Connector: B-133

Harness side

Junction block (Rear view)

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-159

Step 8. Check the wiring harness between B-115
fog lamp relay connector terminal No.2 to B-133
ETACS-ECU connector terminal No.67.

NOTE: Prior to the wiring harness inspection, check
junction block connector B-131, and repair if neces-
sary.

• Check the output lines for open circuit.

Q: Is the check result normal?

YES :

Go to Step 9.

NO :

Repair the wiring harness.

Step 9. Retest the system.
Check that the fog lamps illuminate 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

Malfunction

P.00-13

).

NO :

Replace the ETACS-ECU.

AC313824 AH

Connector: B-115

Junction block side

Junction block (Front view)

AC313827AF

B-131

B-131

B-133 (GR)

B-133

Connectors: B-131, B-133

Junction block (Rear view)

Harness side

Harness side

Main

Index

Group

TOC