Mitsubishi Montero (2004+). Manual - part 754

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-273

STEP 9. Check the wiring harness between rear wiper 
motor connector I-07 (terminal 1) and ground.
Q: Is the wiring harness between rear wiper motor 

connector I-07 (terminal 1) and ground in good 
condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the connector 

may have loose, corroded or damaged terminals, or 
terminals pushed back in the connector. Repair the 
wiring harness as necessary. Verify that the 
windshield wiper works normally.

INSPECTION PROCEDURE H-2: Rear Wiper and Washer: Rear wiper does not stop at the 
predetermined park position.

.

ACX02293

CONNECTOR: I-07

AR

I-07(B)

I-07(B)

(HARNESS SIDE)

1

2

3

4

Rear Wiper Drive Circuit

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-274

TECHNICAL DESCRIPTION (COMMENT)
If the rear wiper does not stop at predetermined park 
position, the rear wiper motor or the ETACS-ECU 
may be defective.

.

TROUBLESHOOTING HINTS

• The rear wiper motor may be defective 

• The ETACS-ECU may be defective 

• The wiring harness may be damaged of the con-

nectors may have loose, corroded or damaged 
terminals, or terminals pushed back in the con-
nector 

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

Check the input signal (by using the pulse check mode of 
the monitor.)
Check the automatic stop signal, which the rear wiper motor 
sends to the ETACS-ECU.
NOTE: When the rear wiper is operated, a signal is sent to the 
ETACS-ECU.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Operate scan tool MB991958 according to the procedure 

below to display "PULSE CHECK."

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

(3) Check that scan tool MB991958 sounds.
Q: Does scan tool MB991958 sound when the rear wiper 

switch is operated?
YES : Replace the ETACS-ECU. The rear wiper should stop 

automatically at the predetermined park position.

NO :  Refer to Inspection Procedure P-8 "ETACS-ECU does 

not receive an automatic stop signal from the wiper 
motor 

P.54B-615

."

AC307591 AB

MB991911

DATA LINK

CONNECTOR

MB991824

MB991827

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-275

INSPECTION PROCEDURE H-3: Rear Wiper and Washer: When the selector lever is moved to "R" 
position during the rear wiper operation, the rear wiper does not operate at the continuous mode.

NOTE: This troubleshooting procedure requires use 
of scan tool MB991958 and SWS monitor kit 
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor 

P.54B-10

."

.

CIRCUIT OPERATION
The ETACS-ECU operates the rear wiper consecu-
tively approximately twice when the selector lever is 
moved to "R" position while the rear wiper is turned 
on.

.

TECHNICAL DESCRIPTION (COMMENT)
If the rear wiper does not work consecutively approx-
imately twice, the transmission range switch ("R" 
position) or the ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The transmission range switch may be defective

• The ETACS-ECU may be defective 

• The wiring harness may be damaged or the con-

nectors may have loose, corroded or damaged 
terminals, pushed back in the connector 

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

• MB991813: SWS Monitor Kit

• MB991806: SWS Monitor Cartridge

• MB991812: SWS Monitor Harness (For Column-ECU)

• MB991822: Probe Harness

"R" Position during Rear Wiper Operation Circuit

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-276

STEP 1. Verify the rear wiper operation.
Q: Does the rear wiper operate normally?

YES : Go to Step 2.
NO :  Refer to Inspection Procedure H-1 "Rear wiper does 

not work at all 

P.54B-265

."

STEP 2. Check the input signal by using "FUNCTION 
DIAG." menu of the SWS monitor.
Set each switch to the following condition before checking input 
signal from the transmission range switch ("R" position).

• Ignition switch: ON

• Rear wiper switch: ON

• Shift position: "R" position

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958. 
(1) Connect the special tool. Refer to "How to connect SWS 

monitor 

P.54B-7

(2) Connect SWS monitor kit MB991862 to the data link 

connector (13-pin).

(3) Operate scan tool MB991958 according to the procedure 

below to display "REV. INTERLOCK."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "REAR WIPER."
6. Select "REV. INTERLOCK."

(4) Check that normal conditions are displayed on the item 

described in the table below.

Q: Are normal conditions displayed?

YES : Replace the ETACS-ECU. When the selector lever is 

moved to the "R" position, the rear wiper should 
operate consecutively approximately twice.

NO :  Refer to Inspection Procedure O-4 "ETACS-ECU 

does not receive "R" position signal from the 
transmission range switch 

P.54B-513

."

ITEM NO.

ITEM NAME

NORMAL CONDITION

ITEM 41

PNP SW (R)

ON

AC309091

MB991911

MB991827

MB991824 

AB

MB991806

MB991862

DATA LINK
CONNECTOR 
(16-PIN)

DATA LINK
CONNECTOR 
(13-PIN)