Mitsubishi Montero (2002-2004). Manual — part 592
TSB Revision
DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-65
STEP 6. Measure the sensor supply voltage at engine
coolant temperature sensor harness side connector B-37.
(1) Disconnect the connector B-37 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 1 and ground.
• Voltage should be between 4.5 and 4.9 volts.
(4) 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 8.
NO : Go to Step 7.
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 14.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 14.
AK200943
1
2
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-37
B-37(B)
AK000234 AL
2 1
B-37 HARNESS
CONNECTOR:
COMPONENT SIDE
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CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
TSB Revision
DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-66
STEP 8. Check the continuity at engine coolant
temperature sensor harness side connector B-37.
(1) Disconnect the connector B-37 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 connector D-135 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
. Then go to Step 14.
AK200943
1
2
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-37
B-37(B)
AK000235
B-37 HARNESS
CONNECTOR:
COMPONENT SIDE
1
2
AL
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CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
TSB Revision
DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-67
STEP 10. Check for harness damage between engine
coolant temperature sensor connector B-37 (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 14.
NO : Repair it. Then go to Step 14.
AK200943
1
2
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-37
B-37(B)
AK200947
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CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
TSB Revision
DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-68
STEP 11. Check the engine coolant temperature sensor.
(1) Disconnect the engine coolant temperature sensor
connector B-37.
(2) Remove the engine coolant temperature sensor.
(3) With the temperature sensing portion of engine coolant
temperature sensor immersed in hot water, check
resistance.
Standard value:
14
− 17 kiloohms [at −20°C (−4°F)]
5.1
− 6.5 kiloohms [at 0°C (32°F)]
2.1
− 2.7 kiloohms [at 20°C (68°F)]
0.9
− 1.3 kiloohms [at 40°C (104°F)]
0.48
− 0.68 kiloohm [at 60°C (140°F)]
0.26
− 0.36 kiloohm [at 80°C (176°F)]
(4) Apply 3M
ä AAD part number 8731 or equivalent on the
screw section of the engine coolant temperature sensor.
(5) Install the engine coolant temperature sensor, and tighten
to the specified torque.
Tightening torque: 29
± 10 N⋅m (22 ± 7 ft-lb)
Q: Is the resistance at the standard value?
YES : Go to Step 12.
NO : Replace the engine coolant temperature sensor. Then
go to Step 14.
STEP 12. Check connector D-135 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 13.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 14.
AK200943
1
2
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-37
B-37(B)
AKX01622
AKX01623 AB
AK200947
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CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
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