Mitsubishi Montero (2002-2004). Manual - part 972

DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-371

STEP 4. Check the harness for open circuit or damage 
between transfer-ECU connector E-109 (terminals 6, 8, 10 
and 19) and M-ASTC-ECU connector E-121 (terminals 71, 
72, 73 and 79).
Q: Are the harness wires in good condition?

YES : Go to Step 5.
NO :  Repair or replace the harness wire(s).

STEP 5. 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 : Go to Step 6.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-

2

.

STEP 6. Replace the transfer-ECU.
(1) Replace the transfer-ECU.
(2) Test drive the vehicle.
(3) Check for transfer diagnostic trouble code.
Q: Is DTC 61 set?

YES : Start over at Step 1.
NO :  The procedure is complete.

AC204194 BB

CONNECTORS : E-121, E-123

71 72 73 74 75 76

77 78 79 80 81 82

83 84

85 86 87

12

9 10 11

8

7

5 6

16

14

13

15

18

17

19

2

1

3 4

E-121

E-123 (GR)

E-121

E-123

AC204176

CONNECTOR : E-109

BB

11 12

25

24

13

26

9

22

7

6

20

19

8

21

10

23

5

4

17

2

1

15

14

3

16

18

NOTES

23Ad-1

GROUP 23Ad

CONTENTS

SYMPTOM PROCEDURES <AUTOMATIC 
TRANSMISSION>  . . . . . . . . . . . . . . .

23Ad-2

SYMPTOM PROCEDURES <KEY INTERLOCK 
AND SHIFT LOCK MECHANISMS>. .

23Ad-78

SYMPTOM PROCEDURES <AUTOMATIC TRANSMISSION>

TSB Revision

SYMPTOM PROCEDURES

23Ad-2

.

SYMPTOM PROCEDURES <AUTOMATIC TRANSMISSION>

INSPECTION PROCEDURE 1: Engine does not Crank

.

COMMENT
If the engine does not crank when the selector lever 
is in "P" or "N" position, the cause is probably a mal-
function of transmission range switch system, trans-
mission control cable assembly, engine system, 
torque converter or oil pump.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this case:)

• Malfunction of the transmission range switch

• Malfunction of the transmission control cable 

assembly

• Malfunction of the engine system

• Malfunction of the torque converter

• Malfunction of the oil pump

• Malfunction of the PCM

DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, read the A/T 
diagnostic trouble code.

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) Turn the ignition switch to the "ON" position.
(3) Check for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is A/T DTCs 27 or 28 set?

YES : Refer to 

P.23Ac-93

, 

P.23Ac-123

, DTCs 27, 28: Park/

Neutral Position Switch System.

NO :  Go to Step 2.

STEP 2. Check the transmission control cable assembly.
Move the selector lever to each position. The manual control 
lever position of the transmission range switch should match 
the transmission range.
Q: Is the manual control lever position correct?

YES : Go to Step 3.
NO :  Repair the transmission control cable. Refer to 

P.23Aa-20

, Transmission Range Switch and Control 

Cable Adjustment. Retest the system to verify the 
repair.

ACX01539AD

MB991502

16-PIN

ACX02178

P

R

N

D

3
2

L

AC

TRANSMISSION
RANGE SWITCH

MANUAL
CONTROL
LEVER