Mitsubishi Montero (2002-2004). Manual - part 923

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-175

STEP 7. Check the harness for an open or short circuit to 
ground between A/T control solenoid valve assembly 
connector C-03 terminal 4 and PCM connector D-136 
terminal 136.
Q: Is the harness wire in good condition?

YES : Replace the PCM.
NO :  Repair or replace the harness wire.

AC204395

CONNECTOR : C-03

AE

C-03 (B)

6

10

4

9

5

3

8

2

7

1

AC204681AD

CONNECTOR: D-136

D-136 (GR)

121 122

123

124

125 126 127 128 129 130

131 132

133

134 135

136 137 138

139 140

141

142 143

144

145

146

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-176

STEP 8. Measure the supply voltage at A/T control 
solenoid valve assembly connector C-03 by backprobing.
(1)  Do not disconnect solenoid valve assembly harness 

connector C-03.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between harness connector C-03 

terminal 9 and ground by backprobing.

• The voltage should equal battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage battery positive voltage?

YES : Go to Step 11.
NO :  Go to Step 9.

AC204395

CONNECTOR : C-03

AE

C-03 (B)

6

10

4

9

5

3

8

2

7

1

AC204918

6

9

5

10

8

3

7

2

1

4

AC204918 AM

C-03 HARNESS CONNECTOR : 
HARNESS SIDE

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-177

STEP 9. Check A/T control solenoid valve assembly 
connector C-03, A/T control relay connector D-13 and 
intermediate connector E-114 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 10.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-

2

.

AC204395

CONNECTOR : C-03

AE

C-03 (B)

6

10

4

9

5

3

8

2

7

1

AC204750

CONNECTOR : D-13

AB

PCM

1
3 4

2

AC204176

CONNECTOR : E-114

BD

38

28

16

33

22

10

31

19

7

1

18

30

29

17

5

6

21

20

32

8

2

9

25

13

3

24

23

3435

1112

27

26

3637

14

4

15

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-178

STEP 10. Check the harness for an open circuit or short 
circuit to ground between A/T control solenoid valve 
assembly connector C-03 terminal 9 and A/T control relay 
connector D-13 terminal 3.
Q: Is the harness wire in good condition?

YES : Go to Step 11.
NO :  Repair or replace the harness wire.

AC204395

CONNECTOR : C-03

AE

C-03 (B)

6

10

4

9

5

3

8

2

7

1

AC204750

CONNECTOR : D-13

AB

PCM

1
3 4

2