Mitsubishi Montero (2002-2004). Manual - part 314

 

  Index      Mitsubishi     Mitsubishi Montero - service repair manual 2002-2004 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  312  313  314  315   ..

 

 

Mitsubishi Montero (2002-2004). Manual - part 314

 

 

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-303

General circuit diagram for the daytime running lights

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-304

INSPECTION PROCEDURE J-1: Headlight and Taillight: Taillights does not illuminate normally.

NOTE: This troubleshooting procedure requires the 
use of scan tool MB991502 and SWS monitor kit 
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor 

P.54Ba-8

."

.

CIRCUIT OPERATION
When the lighting switch is set to "TAIL" position, the 
"TAIL" signal is sent through the column-ECU (incor-
porated in the column switch) to the front-ECU. If the 
front-ECU receives the "TAIL" signal through the col-
umn-ECU, the front-ECU turns on the taillight relay 
(incorporated in the front-ECU), thus causing the tail-
lights to illuminate.

.

TECHNICAL DESCRIPTION (COMMENT)
If the taillights do not illuminate normally, the column 
switch or the front-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The column switch (taillight switch) may be defec-

tive

• The front-ECU may be defective

• The wiring harness or connectors may have 

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

Taillight Relay Circuit

AC204183

CONNECTOR : A-07X

AG

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-305

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II) 

• MB991862: SWS monitor kit 

STEP 1. Use scan tool MB991502 to select "ECU COMM 
CHK" on the SWS monitor display.
Check the following ECUs:

• Column-ECU

• Front-ECU

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) Connect SWS monitor kit MB991862 to the data link 

connector (13-pin).

(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Operate scan tool MB991502 according to the procedure 

below to display "ECU COMM CHK."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "ECU COMM CHK."

(5) Scan tool MB991502 should show "OK" on the "ECU 

COMM CHK" menus for both the "COLUMN ECU" and the 
"FRONT ECU" menus.

Q: Is "OK" displayed on both the "COLUMN ECU" and 

"FRONT ECU" menus?
"OK" are displayed for all the items : 
Go to Step 2.
"NG" is displayed on the "COLUMN ECU" menu : Refer 

to Inspection Procedure A-2 "Communication with 
column switch (column-ECU) is not possibl

P.54Bb-

16

."

"NG" is displayed on the "FRONT ECU" menu : Refer to 

Inspection procedure A-4 "Communication with front-
ECU is not possible 

P.54Bb-32

."

STEP 2. Check the input signal by using "FUNCTION 
DIAG." menu of the SWS monitor.
Check the input signals from the following switches:

• Ignition switch: ON

• Lighting switch: TAIL

NOTE: Turn the ignition switch to the "ON" position in order to 
disable the headlight automatic shutdown function.

AC204222AB

16-pin

13-pin

MB991502

MB991862

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-306

Operate scan tool MB991502 according to the procedure below 
to display "TAILLIGHT."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "LIGHTING."
6. Select "TAILLIGHT."

Check that normal conditions are displayed on the items 
described in the table below.

Q: Are normal conditions displayed on the "TAILLIGHT 

SW", "H/L AUTO-CUT" and "FRONT ECU ACK"?
YES : 
Go to Step 3.
NO : 

• Normal condition is not displayed on the "TAIL 

LIGHT SW": Refer to Inspection Procedure O-6 
"ETACS-ECU does not receive any signal from 
the taillight switch 

P.54Bc-31

."

• Normal condition is not displayed on the "H/L 

AUTO-CUT": Refer to Inspection Procedure J-9 
"The headlight automatic shutdown function does 
not work normally 

P.54Bb-373

."

• Normal condition is not displayed on the "FRONT 

ECU ACK": Replace the front-ECU. Verify that the 
taillights illuminate normally.

ITEM NO.

ITEM NAME

NORMAL 
CONDITION

ITEM 01

TAILLIGHT SW

ON

ITEM 35

H/L AUTO-CUT

OFF

ITEM 70

FRONT ECU ACK

NORMAL ACK

AC204222AB

16-pin

13-pin

MB991502

MB991862

 

 

 

 

 

 

 

Content   ..  312  313  314  315   ..