Mitsubishi Montero (2002-2004). Manual - part 338

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-399

INSPECTION PROCEDURE K-2: Flasher Timer: Hazard warning lights do not illuminate.

.

CIRCUIT OPERATION
If the ETACS-ECU receives "ON" signal from the 
hazard warning light switch, the ETACS-ECU turns 
on the flasher timer (incorporated in the ETACS-
ECU), thus causing the turn-signal lights to flash.

.

TECHNICAL DESCRIPTION (COMMENT)
If the hazard warning lights do not flash, the power 
supply line to the ETACS-ECU (dedicated to the turn-
signal lights) or the ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The hazard warning light switch may be defective

• The ETACS-ECU may be defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector 

Hazard Warning Light Circuit

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-400

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II) 

STEP 1. Verify the turn-signal light operation.
Q: Do the turn-signal lights illuminate normally?

YES : Go to Step 2.
NO :  Refer to Inspection Procedure K-1 "Turn-signal lights 

does not flash when the turn-signal light switch is 
turned on 

P.54Bb-392

."

STEP 2. Check the input signal (by using the pulse check 
mode of the monitor.)
Check input signal from the hazard warning light switch.

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector 

(16-pin).

(2) Operate scan tool MB991502 according to the procedure 

below to display "PULSE CHECK."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "PULSE CHECK."

(3) Verify that scan tool MB991502 sounds when the hazard 

warning light switch is turned from "OFF" to "ON."

Q: Does scan tool MB991502 sound when the hazard 

warning light switch is turned from "OFF" to "ON"?
YES : Replace the ETACS-ECU. Verify that the hazard 

warning lights illuminate normally.

NO :  Refer to Inspection Procedure P-2 "ETACS-ECU does 

not receive any signal from the hazard warning light 
switch 

P.54Bc-53

."

ACX01539

16-pin

MB991502

AI

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-401

INSPECTION PROCEDURE K-3: Frasher timer: One of the turn-signal light do not illuminate.

Turn-signal Lights Circuit

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-402

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TECHNICAL DESCRIPTION (COMMENT)
If the right or left turn-signal light does not illuminate, 
their bulb may be defective.

.

TROUBLESHOOTING HINTS

• The turn-signal light bulb may be defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

.

AC204167

CONNECTORS : A-16, A-19

A-16

AR

A-19(B)

AC204166

CONNECTOR : A-35

AN

A-35(B)

AC204170

CONNECTORS : D-03,D-04,D-28,D-30,D-125

BM

D-03(GR)

D-04(GR)

D-125

D-28

D-30

AC204171

CONNECTOR : D-111

AG

AC204173

CONNECTORS : D-210, D-212, D-217

D-210

D-217

D-212

AV

AC204174

CONNECTOR : D-222            

AE

AC204179

CONNECTOR : G-19

AM