Mitsubishi Montero (2004+). Manual - part 927

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-283

STEP 6. Check the harness for open circuit or short circuit 
to ground between A/T control relay connector D-13 
terminal 1 and battery.
Q: Is the harness wire in good condition?

YES : Go to Step 19.
NO :  Repair or replace the harness wire.

STEP 7. Measure the resistance at A/T control relay 
connector D-13.
(1) Disconnect the A/T control relay and measure at the 

harness side.

(2) Measure the resistance between terminal 2 and ground.

• The resistance should measure less than 2 ohms.

Q: Is the measured resistance less than 2 ohms?

YES : Go to Step 10.
NO :  Go to Step 8.

AC204750

CONNECTOR : D-13

AB

PCM

1
3 4

2

AC204750

CONNECTOR : D-13

AB

PCM

1
3 4

2

AC204918

D-13 HARNESS CONNECTOR :
COMPONENT SIDE

DG

1
3

4

2

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-284

STEP 8. Check ground joint connector D-14 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 9.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 9. Check the harness for open circuit or damage 
between A/T control relay connector D-13 terminal 2 and 
ground.
Q: Is the harness wire in good condition?

YES : Go to Step 19.
NO :  Repair or replace the harness wire.

AC204171

CONNECTOR : D-14

AM

4

9

8

6

5

7

1 2

3

10

AC204750

CONNECTOR : D-13

AB

PCM

1
3 4

2

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-285

STEP 10. Measure the control voltage to A/T control relay 
connector D-13 by backprobing.
(1) Remove the A/T control relay.
(2) Do not disconnect the A/T control relay and measure at the 

connector side.

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

(4) Measure the voltage between terminal 4 and ground by 

backprobing.

•  The measured voltage should equal battery positive 

voltage.

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

voltage?
YES : Go to Step 16.
NO :  Go to Step 11.

AC204750

CONNECTOR : D-13

AB

PCM

1
3 4

2

AC204918

D-13 HARNESS CONNECTOR :
HARNESS SIDE

DH

2
4

3

1

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-286

STEP 11. Measure the supply voltage at PCM connector 
D-136 by backprobing.
(1) Do not disconnect connector D-136.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 127 and ground by 

backprobing.

•  The measured voltage should equal battery positive 

voltage.

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

voltage?
YES : Go to Step 12.
NO :  Go to Step 14.

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

AC204918 BU

D-136 HARNESS CONNECTOR : 
HARNESS SIDE

138

131

132 133

145

140

146

141

139

124

123

142

134

125 126 127 128 129 130

137

144

136

143

135

122

121