Mitsubishi Montero (2004+). Manual - part 902

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-183

STEP 4. Measure the low-reverse 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 6 and 10.

Resistance value: 2.7 

− 3.4 Ω [at 20°C (68°F)]

Q: Is the measured resistance 2.7 

− 3.4 Ω [at 20°C (68°F)]?

YES : Go to Step 6.
NO :  Go to Step 5.

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 Ω [at 20°C (68°F)]

Q: Is the measured resistance 2.7 

− 3.4 Ω [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-63

.

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

CW

6

10

4

9

5

3

8

2

7

1

AC204748

CONNECTOR : C-03-6

AG

1
2

AC204918

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

CR

1
2

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-184

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

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-185

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

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-186

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