Mitsubishi Montero (2002-2004). Manual - part 917

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-151

STEP 5. Measure the solenoid valve resistance at the low-
reverse solenoid valve connector C-03-6 inside the 
transmission.
(1) Disconnect solenoid valve connector C-03-6 and measure 

at the solenoid valve side.

(2) Measure the resistance between low-reverse solenoid 

valve terminals 1 and 2.

Resistance value: 2.7 

− 3.4 ohms [at 20°C (68°F)]

Q: Is the measured resistance 2.7 

− 3.4 ohms [at 20°C 

(68

°F)?

YES : Replace the harness wire between A/T control 

solenoid valve assembly connector C-03 and the 
solenoid valves.

NO :  Replace the low-reverse solenoid valve. Refer to 

GROUP 23B, Valve Body 

P.23B-80

.

AC204748

CONNECTOR : C-03-6

AG

1
2

AC204918

C-03-6 HARNESS CONNECTOR : 
LOW-REVERSE SOLENOID 
VALVE SIDE

CR

1
2

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-152

STEP 6. Check A/T control solenoid valve assembly 
connector C-03, PCM connector D-136 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 7.
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

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

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-153

STEP 7. Check the harness for an open or short circuit to 
ground between A/T control solenoid valve assembly 
connector C-03 terminal 6 and PCM connector D-136 
terminal 128.
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-154

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 10 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 AK

C-03 HARNESS CONNECTOR : 
HARNESS SIDE