Mitsubishi Montero (2002-2004). Manual — part 708

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-529

DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check data list item 27:
Power Steering Pressure Switch.

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) Start the engine and run at idle.
(3) Set scan tool MB991502 to the data reading mode for item

27, Power Steering Pressure Switch.

• If the steering wheel is stopped while idling, "OFF" will

be displayed.

• If the steering wheel is steered while idling, "ON" will be

displayed.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

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

P.00-6

.

NO : Go to Step 2.

STEP 2. Check the power steering fluid level.
Refer to GROUP 37A, On-Vehicle Service - Fluid Level Check

P.37A-18

.

Q: Are there any abnormalities?

YES : Go to Step 3.
NO : Repair it. Then go to Step 7.

STEP 3. Check the power steering pressure switch.
Refer to GROUP 37A, On-Vehicle Service - Power Steering
Pressure Switch Check

P.37A-21

.

Q: Are there any abnormalities?

YES : Go to Step 4.
NO : Replace the power steering pressure switch. Then go

to Step 7.

STEP 4. Check the oil pump pressure .
Refer to GROUP 37A, On-Vehicle Service - Oil Pump Pressure
Test

P.37A-3

.

Q: Are there any abnormalities?

YES : Go to Step 5.
NO : Repair it. Then go to Step 7.

ACX01539

16-PIN

MB991502

AC

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-530

STEP 5. Check connector B-29 at the power steering
pressure switch and connector D-133 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 7.

AK200973

1

AB

CONNECTOR: B-29

B-29(B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AK200939

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

52

53

54

55

56

57

58

50

51

AB

CONNECTOR: D-133

HARNESS CONNECTOR:
COMPONENT SIDE

PCM

D-133(GR)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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STEP 6. Check for harness damage between power
steering pressure switch connector B-29 (terminal No. 1)
and PCM connector D-133 (terminal No. 47).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 7.
NO : Repair it. Then go to Step 7.

STEP 7. Using scan tool MB991502, check data list item 27:
Power Steering Pressure Switch.

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) Start the engine and run at idle.
(3) Set scan tool MB991502 to the data reading mode for item

27, Power Steering Pressure Switch.

• If the steering wheel is stopped while idling, "OFF" will

be displayed.

• If the steering wheel is steered while idling, "ON" will be

displayed.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?

YES : The procedure is complete.
NO : Repeat the troubleshooting.

AK200973

1

AB

CONNECTOR: B-29

B-29(B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AK200939

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

52

53

54

55

56

57

58

50

51

AB

CONNECTOR: D-133

HARNESS CONNECTOR:
COMPONENT SIDE

PCM

D-133(GR)

ACX01539

16-PIN

MB991502

AC

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-532

P0606 Powertrain Control Module Main Processor Malfunction

.

TECHNICAL DESCRIPTION

• Throttle actuator control module processor

checks the PCM for abnormal conditions.

.

DTC SET CONDITIONS

Check Conditions

• Ignition switch "ON" position.

Judgement Criteria

• No surveillance pulse signals should be input for

0.5 seconds.

.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

• PCM failed.

DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. 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 P0606 set?

YES : Replace the PCM.
NO : It can be assumed that this malfunction is intermittent.

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

P.00-6

.

P0638 Throttle Actuator Control Motor Circuit Range/Performance Problem

.

Throttle Actuator Control Motor Circuit Range/
Performance Problem Circuit

• Refer to, DTC P2101 − Throttle Actuator Control

Motor Circuit

P.13Ac-318

.

.

CIRCUIT OPERATION

• Refer to, DTC P2101 − Throttle Actuator Control

Motor Circuit

P.13Ac-318

.

.

TECHNICAL DESCRIPTION

• PCM checks the electronic controlled throttle sys-

tem for abnormal conditions.

.

DTC SET CONDITIONS

Check Conditions

• Battery positive voltage is higher than 8.3 volts.

• TPS (main) output voltage is higher than 0.35

volts and lower than 4.8 volts.

• Difference between TPS (main) output voltages

is 0.4volt/100ms or higher.

Judgement Criteria

• Difference between TPS (main) output voltage

and target output voltage should be 0.5 volts or
higher for 0.5 seconds.

Check Conditions

• Battery positive voltage is higher than 8.3 volts.

• TPS1 output voltage is higher than 0.35 volts and

lower than 4.8 volts.

Judgement Criteria

• Difference between TPS (main) output voltage

and target output voltage is 1 volt or higher for 4
seconds.

ACX01539

16-PIN

MB991502

AC