Mitsubishi Montero (2002-2004). Manual - part 590

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-57

STEP 5. Check the sensor supply voltage at PCM 
connector D-135 by backprobing.
(1) Do not disconnect the PCM connector D-135.
(2) Disconnect the intake air temperature sensor connector B-

48.

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

(4) Measure the voltage between terminal No. 99 and ground 

by backprobing.

• Voltage should be between 4.5 and 4.9 volts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.5 and 4.9 volts?

YES : Go to Step 6.
NO :  Go to Step 7.

STEP 6. Check connector D-135 at PCM for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between intake air temperature 

sensor connector B-48 (terminal No. 6) and PCM 
connector D-135 (terminal No. 99) because of open 
circuit. Then go to Step 11.

NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 11.

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

AK201394

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107108109

110111112

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D-135 HARNESS 
CONNECTOR: 
HARNESS SIDE

AB

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-58

STEP 7. Check connector D-135 at PCM for damage.
Q: Is the connector in good condition?

YES : Replace the PCM. Then go to Step 11.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 11.

STEP 8. Check the continuity at intake air temperature 
sensor harness side connector B-48.

(1) Disconnect the connector B-48 and measure at the harness 

side.

(2) Check for the continuity between terminal No. 5 and 

ground.

• Should be less than 2 ohms.

Q: Is the continuity normal?

YES : Replace the PCM. Then go to Step 11.
NO :  Go to Step 9.

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

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AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

AKX01409

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B-48 HARNESS CONNECTOR: 
COMPONENT SIDE

AL

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-59

STEP 9. Check connector D-134 at PCM for damage.
Q: Is the 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 11.

STEP 10. Check for open circuit between intake air 
temperature sensor connector B-48 (terminal No. 5) and 
PCM connector D-134 (terminal No. 88).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 11.
NO :  Repair it. Then go to Step 11.

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CONNECTOR: D-134

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PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

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HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

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CONNECTOR: D-134

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PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-60

STEP 11. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

GROUP 13A, Procedure 6 

− Other Monitor 

P.13Ab-2

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0113 set?

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

DTC P0116: Engine Coolant Temperature Circuit Range/Performance Problem

YELLO

W

-GREEN

SKY B

ULE

AK201129

ENGINE COOLANT
TEMPERATURE SENSOR

POWERTRAIN CONTROL MODULE(PCM)

5 V

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2

B-37

(MU802406)

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Engine Coolant Temperature Sensor Circuit

1 2

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D-135

(MU803805)