Mitsubishi Montero (2002-2004). Manual - part 666

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-361

.

CIRCUIT OPERATION

• The crankshaft position sensor power is supplied 

from the MFI relay (terminal No. 1).

• Terminal No. 1 of the crankshaft position sensor 

is grounded with PCM (terminal No. 88).

• A 5-volt voltage is applied on the crankshaft posi-

tion sensor output terminal (terminal No. 2) from 
the PCM (terminal No. 70). The crankshaft posi-
tion sensor generates a pulse signal when the 
output terminal is opened and grounded.

.

TECHNICAL DESCRIPTION

• The crankshaft position sensor detects the crank 

angle (position) of each cylinder, and converts 
that data to pulse signals, which are then input to 
the PCM.

• When the engine is running, the crankshaft posi-

tion sensor outputs a pulse signal.

• The PCM checks whether pulse signal is input 

while the engine is cranking.

.

DTC SET CONDITIONS

Check Conditions

• Engine is being cranked.

Judgment Criteria

• Crankshaft position sensor output voltage has not 

changed (no pulse signal is input) for 2 seconds.

Check Conditions, Judgment Criteria

• Normal signal pattern has not been input for cyl-

inder identification from the crankshaft position 
sensor signal and camshaft position sensor sig-
nal for 2 seconds.

.

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

• Crankshaft position sensor failed.

• Open or shorted crankshaft position sensor cir-

cuit, or loose connector.

• PCM failed.

AK201057AB

CONNECTOR: B-36

B-36(B)

CRANKSHAFT
POSITION
SENSOR

AK201038

CONNECTOR: D-134

AD

PCM

D-134(GR)

AK201039

MFI RELAY

B-22X

AB

CONNECTOR: B-22X

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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DIAGNOSIS

Required Special Tools:

• MB991502: Scan Tool (MUT-II)

• MD998478: Test Harness (3pin, triangle)

STEP 1. Using scan tool MB991502, check data list item 22: 
Crankshaft Position Sensor.

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 

22, Crankshaft Position Sensor.

• The tachometer and engine speed indicated on the scan 

tool should much.

(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 IN GROUP 00, How to Use Troubleshooting/
Inspection Service Points 

P.00-6

.

NO :  Go to Step 2.

ACX01539

16-PIN

MB991502

AC

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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STEP 2. Using the oscilloscope, check the crankshaft 
position sensor.
(1) Disconnect the crankshaft position sensor connector, and 

connect the test harness special tool (MD998478) in 
between.

(2) Connect the oscilloscope probe to crankshaft position 

sensor connector terminal No. 2 (bank clip of special tool).
NOTE: Connect the oscilloscope plobe to terminal No. 45 
by backprobing when measuring with the PCM connector.

(3) Start the engine and run at idle.

(4) Check the waveform.

• The waveform should show a pattern similar to the illus-

tration.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the waveform normal?

YES : Go to Step 3.
NO :  Go to Step 5.

AK200962

1

2

3

AB

CONNECTOR: B-36

B-36(B)

CRANKSHAFT
POSITION
SENSOR

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK102979AB

MD998478

1 2

3

CRANKSHAFT POSITION
SENSOR CONNECTOR

OSCILLOSCOPE

AKX01559AB

NORMAL WAVEFORM

2 ENGINE REVOLUTIONS

5 V

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-364

STEP 3. Check connector B-36 at the crankshaft position 
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 4.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 21.

STEP 4. Using scan tool MB991502, check data list item 22: 
Crankshaft Position Sensor.

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) Set scan tool MB991502 to the data reading mode for item 

22, Crankshaft Position Sensor.

• The tachometer and engine speed indicated on the scan 

tool should much.

(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 :  Replace the PCM. Then go to Step 21.

AK200962

1

2

3

AB

CONNECTOR: B-36

B-36(B)

CRANKSHAFT
POSITION
SENSOR

HARNESS 
CONNECTOR: 
COMPONENT SIDE

ACX01539

16-PIN

MB991502

AC