Mitsubishi Montero (2002-2004). Manual - part 712

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-545

STEP 8. Check for open circuit and short circuit to ground 
between throttle actuator control motor relay connector B-
23X (terminal No. 1) and PCM connector D-136 (terminal 
No. 132).
Q: Is the harness wire in good condition?

YES : Go to Step 9.
NO :  Repair it. Then go to Step 14.

AK201172

2 1

3

4

B-23X

AB

CONNECTOR: B-23X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201170

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CONNECTOR: D-136

PCM

D-136(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-546

STEP 9. Check for harness damage between MFI relay 
connector B-22X (terminal No. 1) and throttle actuator 
control motor relay connector B-23X (terminal No. 4).
Q: Is the harness wire in good condition?

YES : Repair harness wire between throttle actuator control 

motor relay connector B-23X (terminal No. 2) and 
PCM connector D-132 (terminal No. 15) because of 
harness damage. Then go to Step 14.

NO :  Repair it. Then go to Step 14.

STEP 10. Check connector D-132 and D-136 at PCM for 
damage.
Q:  Is the connector in good condition?

YES : Go to Step 11.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

AK200951

2 1

3

4

B-22X

AB

CONNECTOR: B-22X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201172

2 1

3

4

B-23X

AB

CONNECTOR: B-23X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

2

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1

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AK201566

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CONNECTORS: D-132, D-136

D-132 HARNESS CONNECTOR: 
COMPONENT SIDE

PCM

D-132(GR) D-136(GR)

AB

D-136 HARNESS CONNECTOR: 
COMPONENT SIDE

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-547

STEP 11. Check for harness damage between fusible link 
(5) and throttle actuator control motor relay connector B-
23X (terminal No. 3).
Q: Is the harness wire in good condition?

YES : Go to Step 12.
NO :  Repair it. Then go to Step 14.

STEP 12. Check for harness damage between throttle 
actuator control motor relay connector B-23X (terminal No. 
1) and PCM connector D-136 (terminal No. 132).
Q: Is the harness wire in good condition?

YES : Go to Step 13.
NO :  Repair it. Then go to Step 14.

AK201172

2 1

3

4

B-23X

AB

CONNECTOR: B-23X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201172

2 1

3

4

B-23X

AB

CONNECTOR: B-23X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201170

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

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144

145

146

CONNECTOR: D-136

PCM

D-136(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-548

STEP 13. Using scan tool MB991502, read the diagnostic 
trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to the "LOCK"(OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P0657 set?

YES : Replace the PCM. Then go to Step 14.
NO :  It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points 

P.00-6

.

STEP 14. Using scan tool MB991502, read the diagnostic 
trouble code (DTC).
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P0657 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

ACX01539

16-PIN

MB991502

AC

ACX01539

16-PIN

MB991502

AC