Mitsubishi Montero (2002-2004). Manual - part 625

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-197

STEP 7. Check harness connector B-26 at left bank heated 
oxygen sensor (front) for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 8.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 15. 

AK201278

1

2

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CONNECTOR: B-26

B-26(GR)

AB

HARNESS 
CONNECTOR: 
COMPONENT 
SIDE

RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-198

STEP 8. Check the continuity at left bank heated oxygen 
sensor (front) harness side connector B-26.
(1) Disconnect the connector B-26 and measure at the harness 

side.

(2) Check for the continuity between terminal No. 2 and 

ground.

• Should be less than 2 ohms.

Q: Is the continuity normal?

YES : Go to Step 11.
NO :  Go to Step 9.

STEP 9. Check harness connector D-135 at PCM for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 10.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 15. 

AK201278

1

2

3

4

CONNECTOR: B-26

B-26(GR)

AB

HARNESS 
CONNECTOR: 
COMPONENT 
SIDE

RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)

AKX01497

B-26 HARNESS 
CONNECTOR: 
COMPONENT SIDE

1

2

4

3

AG

AK200947

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-199

STEP 10. Check for open circuit and harness damage 
between left bank heated oxygen sensor (front) connector 
B-26 (terminal No. 2) and PCM connector D-135 (terminal 
No. 96).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 15.
NO :  Repair it. Then go to Step 15.

AK201278

1

2

3

4

CONNECTOR: B-26

B-26(GR)

AB

HARNESS 
CONNECTOR: 
COMPONENT 
SIDE

RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)

AK200947

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-200

STEP 11. Check harness connector D-135 at PCM for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 12.
NO :  Repair or replace it. Then go to Step 15.

AK200947

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

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119

120

CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)