Mitsubishi Montero (2002-2004). Manual - part 953

DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-295

STEP 12. Measure the resistance at the transfer-ECU 
connector E-109 by backprobing.
(1) Do not disconnect connector E-109.

(2) Measure the resistance between terminal 18 and ground by 

backprobing.

• The resistance should measure less than 2 ohms.

Q: Is the measured resistance less than 2 ohms?

YES : Go to Step 13.
NO :  Go to Step 15.

STEP 13. Check rear propeller shaft speed sensor 
connector C-07 and transfer-ECU connector E-109 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 14.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-

2

.

AC204176

CONNECTOR : E-109

BB

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25

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18

AC204918 CF

E-109 HARNESS CONNECTOR : 
HARNESS SIDE

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AC204751

CONNECTOR : C-07

AB

1 2 3

C-07 (GR)

AC204176

CONNECTOR : E-109

BB

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DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-296

STEP 14. Check harness for open circuit or damage 
between rear propeller shaft speed sensor harness side 
connector C-07 terminal 1 and transfer-ECU connector E-
109 terminal 18.
Q: Is the harness wire in good condition?

YES : Go to Step 16.
NO :  Repair or replace the harness wire.

STEP 15. Check transfer-ECU connector E-109 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Are the connector and terminals in good condition?

YES : Replace the PCM.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-

2

.

AC204751

CONNECTOR : C-07

AB

1 2 3

C-07 (GR)

AC204176

CONNECTOR : E-109

BB

11 12

25

24

13

26

9

22

7

6

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18

AC204176

CONNECTOR : E-109

BB

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DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-297

STEP 16. Using an oscilloscope, check the rear propeller 
shaft speed sensor waveform at transfer-ECU connector E-
109 by backprobing.
(1) Do not disconnect connector E-109.

(2) Connect an oscilloscope probe to transfer-ECU connector 

E-109 terminal 9 and 18 by backprobing.

(3) Start the engine and drive the vehicle at constant speed of 

30 km/h (19 mph).

(4) Check the rear propeller shaft speed sensor waveform.

• The rear propeller shaft speed sensor waveform should 

show a pattern similar to the illustration. The maximum 
value should be 4.8 volts and more and the minimum 
value 0.8 volt and less. The output waveform should not 
contain electrical noise.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the waveform normal?

YES : Go to Step 19.
NO :  Go to Step 17.

STEP 17. Replace the rear propeller shaft speed sensor.
(1) Replace the rear propeller shaft speed sensor. Refer to 

GROUP 23B, Transfer 

P.23B-103

.

(2) Test drive the vehicle.
(3) Check for transfer diagnostic trouble code.
Q: Is transfer DTC 24 or 25 set?

YES : Go to Step 18.
NO :  The procedure is complete.

AC204176

CONNECTOR : E-109

BB

11 12

25

24

13

26

9

22

7

6

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AC204946 AC

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OSCILLO-
SCOPE

PROBE

E-109 HARNESS CONNECTOR : 
HARNESS SIDE

AC100335

NORMAL WAVEFORM

(V)

5

0

AB

ACX01228AE

REAR PROPELLER
SHAFT SPEED SENSOR

DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

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STEP 18. Replace the sensor rotor.
(1) Replace the sensor rotor. Refer to GROUP 23B, Transfer 

P.23B-103

.

(2) Test drive the vehicle.
(3) Check for transfer diagnostic trouble code.
Q: Is transfer DTC 24 or 25 set?

YES : The transfer DTC may have set due to external radio 

frequency (RFI), possibly caused by cellular phone 
activity, or aftermarket components installed on the 
vehicle.

NO :  The procedure is complete.

STEP 19. Using scan tool MB991502, check data list item 
03: Rear Propeller Shaft Speed Sensor.

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.
(2) Start the engine.
(3) Set scan tool MB991502 to data reading mode for item 03, 

Rear Propeller Shaft Speed Sensor.

• When driving at constant speed of 30 km/h (19 mph), 

the display should be "30 km/h (19 mph)."

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points 

− How to Cope with 

Intermittent Malfunction 

P.00-6

.

NO :  Replace the transfer-ECU.

ACX02196AB

ACX01539AD

MB991502

16-PIN