Mitsubishi Montero (2002-2004). Manual - part 925

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-183

STEP 3. Using scan tool MB991502, read the A/T 
diagnostic trouble code.
(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: Are DTC 32 and DTC 33 set? (Multiple DTCs may be set.)

YES : Go to Step 8.
NO :  Go to Step 4.

STEP 4. Measure the overdrive solenoid valve resistance 
at A/T control solenoid valve assembly connector C-03.
(1) Disconnect connector C-03 and measure at the solenoid 

valve side.

(2) Measure the resistance between solenoid valve assembly 

connector C-03 terminals 5 and 9.

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 : Go to Step 6.
NO :  Go to Step 5.

ACX01539AD

MB991502

16-PIN

AC204395

CONNECTOR : C-03

AE

C-03 (B)

6

10

4

9

5

3

8

2

7

1

AC204918

C-03 HARNESS CONNECTOR : 
SOLENOID VALVE SIDE

CV

6

10

4

9

5

3

8

2

7

1

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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

at the solenoid valve side.

(2) Measure the resistance between overdrive 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 overdrive solenoid valve. Refer to 

GROUP 23B, Valve Body 

P.23B-80

.

AC204748

CONNECTOR : C-03-1

AB

1
2

AC204918

C-03-1 HARNESS CONNECTOR : 
OVERDRIVE SOLENOID 
VALVE SIDE

CM

1
2

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

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DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-185

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

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STEP 7. Check the harness for an open or short circuit to 
ground between A/T control solenoid valve assembly 
connector C-03 terminal 5 and PCM connector D-136 
terminal 138.
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