Mitsubishi Pajero Pinin. Manual - part 358

SWS – 

Troubleshooting

54B-34

Inspection Procedure K-1

Front fog lamp: Front fog lamps do not illuminate when the
front fog lamp switch is turned on.

Probable cause

If the tail lamps illuminate normally, the front fog lamp switch, the front fog lamp
relay, the front-ECU or the ETACS-ECU may be defective.

D

Malfunction of front fog lamp switch

D

Malfunction of front fog lamp relay

D

Malfunction of front-ECU

D

Malfunction of ETACS-ECU

D

Malfunction of harness wire or connector.

NOTE
If only one of the front fog lamp or fog lamp indicator lamp does not illuminate, the harness wire between
the lamp and front fog lamp relay may be defective or the lamp bulb may be burned out. In this case,
check the front fog lamp circuit.

Is the tail lamps operated normally?

NG

Check the tail lamp circuit. (Refer to P.54B-29, Inspection Proce-
dure I-1.)

OK

MUT-

II

 input signal check

D

Front fog lamp switch

NG

Check the front fog lamp switch input circuit. (Refer to P.54B-39,
Inspection Procedure N-5.)

OK

Check the front fog lamp relay. (Refer to GROUP 54A – Headlamp,
Font Turn-signal Lamp and Front Fog Lamp.)

NG

Replace

OK

Measure at front fog lamp relay connector A-40X.

D

Disconnect connector and measure at relay box side.

D

Voltage between terminal 3 and body earth.
OK: System voltage

D

Voltage between terminal 4 and body earth.
OK: System voltage

NG

Check the following connector:
A-40X

OK

Check trouble symptoms.

NG

Repair

NG

Check the harness wire between front fog lamp relay and battery.

OK

Check the following connectors:
A-37X, A-40X

OK

Check trouble symptoms.

NG

Repair

NG

Check the harness wire between front fog lamp relay and front-ECU.

NG

Repair

OK

Check the following connectors:
A-40X, A-22, A-32, C-06

NG

Repair

OK

Check trouble symptoms.

NG

Check the harness wire between front fog lamp relay and front
fog lamps.

NG

Repair

OK

Replace the front-ECU.

Inspection Procedure K-2

Front fog lamp: Front fog lamp do not go out when the tail
lamps are turned off while the fog lamps are on.

Probable cause

If the malfunction above occurs, the ETACS-ECU may be defective.

D

Malfunction of ETACS-ECU

Replace the ETACS-ECU.

SWS – 

Troubleshooting

54B-35

Inspection Procedure L-1

Rear fog lamp: Rear fog lamps do not illuminate when the
rear fog lamp switch is turned on.

Probable cause

If the headlamps and front fog lamp <vehicles with front fog lamp> illuminate
normally, the rear fog lamp switch, the rear fog lamp relay or the ETACS-ECU
may be defective.

D

Malfunction of rear fog lamp switch

D

Malfunction of rear fog lamp relay

D

Malfunction of ETACS-ECU

D

Malfunction of harness wire or connector.

Are the headlamps and front fog lamps <vehicles with front fog
lamp>  operated normally?

No

Check the defective device. (Refer to P.54B-12, Trouble Symptom
Chart.)

Yes

MUT-

II

 input signal check

D

Rear fog lamp switch

NG

Check the Rear fog lamp switch input circuit. (Refer to P.54B-40,
Inspection Procedure N-6.)

OK

Check the rear fog lamp relay. (Refer to GROUP 54A – Rear Com-
bination Lamp and Rear Fog Lamp.)

NG

Replace

OK

Measure at rear fog lamp relay connector C-86.

D

Disconnect connector and measure at relay box side.

D

Voltage between terminal 3 and body earth.
OK: System voltage

D

Voltage between terminal 5 and body earth.
OK: System voltage

NG

Check the following connectors:
C-76, C-77, C-86

OK

Check trouble symptoms.

NG

Repair

NG

Check the harness wire between rear lamp relay and battery.

OK

Check the following connectors:
C-83, C-86

OK

Check trouble symptoms.

NG

Repair

NG

Check the harness wire between rear fog lamp relay and ETACS-
ECU.

NG

Repair

NG

Check the harness wire between rear fog lamp relay and rear
fog lamp.

NG

Repair

OK

Replace the ETACS-ECU.

OK

Check the rear fog lamp bulb.

NG

Replace

OK

Measure at rear fog lamp connector D-40.

D

Disconnect connector and measure at harness side.

D

Continuity between terminal 1 and body earth.
OK: Continuity

NG

Check the following connector:
D-40

OK

Check trouble symptoms.

NG

Repair

NG

Check the harness wire between rear fog lamp and body earth.

OK

Check the following connectors:
C-38 <L.H. drive vehicles> or C-42 <R.H. drive vehicles>, C-86,
D-40

OK

Check trouble symptoms.

NG

Repair

SWS – 

Troubleshooting

54B-36

Inspection Procedure L-2

Rear fog lamp: Rear fog lamp do not go out when the
headlamps and front fog lamps <vehicles with front fog
lamp> are turned off while the fog lamps are on.

Probable cause

If the malfunction above occurs, the ETACS-ECU may be defective.

D

Malfunction of ETACS-ECU

Replace the ETACS-ECU.

Inspection Procedure M-1

Room lamp: The room lamp does not illuminate.

Probable cause

If the room lamp does not illuminate at all, the room lamp bulb may be burned
out, or the power supply circuit or the ETACS-ECU may be defective.

D

Malfunction of room lamp

D

Malfunction of ETACS-ECU

D

Malfunction of harness wire or connector

Does the room lamp turn on when the room lamp switch is
set to the ON position?

Yes

Check the following connectors:
C-73, C-82, D-07

OK

Check trouble symptoms.

NG

Repair

NG

Check the harness wire between room lamp and ETACS-ECU.

OK

Replace the ETACS-ECU.

No

Measure at room lamp connector D-07.

D

Disconnect connector and measure at harness side.

D

Voltage between terminal 1 and body earth.
OK: System voltage

NG

Check the following connectors:
C-72, C-73, D-07

OK

Replace the room lamp.

OK

Check trouble symptoms.

NG

Repair

NG

Check the harness wire between room lamp and fusible link (3).

SWS – 

Troubleshooting

54B-37

Inspection Procedure M-2

Room lamp: The room lamp dimming function does not
work normally.

Probable cause

The ETACS-ECU dims the room lamp according to the input signals from the
following switches:

D

Ignition switch (IG1)

D

Key reminder switch

D

Driver’s door switch

D

Door switches

D

Driver’s door lock actuator switch <vehicles with keyless entry system>

If the Room lamp does not be dimmed normally, the relevant input signal circuit
or the ETACS-ECU may be defective.

D

Malfunction of key reminder switch

D

Malfunction of driver’s door switch

D

Malfunction of door switches

D

Malfunction of driver’s door lock actuator switch

D

Malfunction of ETACS-ECU

D

Malfunction of harness wire or connector

OK

Replace the ETACS-ECU.

Do all of the following functions operate when the ignition key
is at the LOCK (OFF) position?

D

Light reminder warning function

D

Central door locking system

D

Hazard warning lamp

NG

Check the ETACS-ECU battery circuit. (Refer to P.54B-47, Inspec-
tion Procedure O-1.)

OK

MUT-

II

 input signal check

D

Ignition switch (IG1)

D

Key reminder switch

D

Driver’s door switch

D

Door switches

D

Driver’s door lock actuator switch <vehicles with keyless
entry system>

NG

Check the defective input circuit. (Refer to P.54B-13, Defects Found
by Input Signal Check.)

Inspection Procedure N-1

Ignition switch (ACC) signal is not sent to the ETACS-ECU.

Probable cause

The ignition switch (ACC) input signal is used to operate the following devices. If
the signal fails, these devices will not work normally.

D

Windshield wiper and washer

D

Rear wiper and washer

D

Headlamp washer <vehicles with headlamp washer>

D

Malfunction of ETACS-ECU

D

Malfunction of harness wire or connector

Measure at ETACS-ECU connector A-38X.

D

Disconnect connector and measure at J/B side.

D

Turn the ignition switch to ACC position.

D

Voltage between terminal 24 and body earth.
OK: System voltage

NG

Check the following connectors:
A-38X, C-72, C-74

OK

Check trouble symptoms.

NG

Repair

NG

Check the harness wire between ETACS-ECU and ignition switch
(ACC).

OK

Replace the ETACS-ECU.