Infiniti Q45. Manual - part 434

DTC P0335 CKP SENSOR (POS)

EC-375

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Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

Diagnostic Procedure

NBS001WF

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten three ground screws on the body.
Refer to 

EC-154, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

13

P/L

Crankshaft position sensor 
(POS)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm 
at idle

1.0 - 2.0V

[Engine is running]

●

Engine speed: 2,000 rpm

1.0 - 2.0V

PBIB1041E

PBIB1042E

PBIB2417E

EC-376

DTC P0335 CKP SENSOR (POS)

2. 

CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT

1.

Disconnect crankshaft position (CKP) sensor (POS) harness
connector.

2.

Turn ignition switch ON.

3.

Check voltage between CKP sensor (POS) terminal 3 and
ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M135, F105

●

Harness connectors F33, E33

●

Harness connectors E35, E305

●

Harness for open or short between crankshaft position sensor (POS) and ECM 

●

Harness for open or short between crankshaft position sensor (POS) and ECM relay

>> Repair open circuit or short to ground or short to power in harness or connectors.

4. 

CHECK CKP SENSOR (POS) GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check harness continuity between CKP sensor (POS) terminal 1 and ground.
Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

PBIB0022E

Voltage: Battery voltage

SEF479Y

Continuity should exist.

DTC P0335 CKP SENSOR (POS)

EC-377

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EC

5. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E305, E35

●

Harness connectors E33, F33

●

Harness connectors E32, F32

●

Harness for open or short between crankshaft position sensor (POS) and ground

>> Repair open circuit or short to power in harness or connectors.

6. 

CHECK CKP SENSOR (POS) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 13 and CKP sensor (POS) terminal 2.
Refer to Wiring Diagram.

3.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E305, E35

●

Harness connectors E33, F33

●

Harness for open or short between crankshaft position sensor (POS) and ECM 

>> Repair open circuit or short to ground or short to power in harness or connectors.

8. 

CHECK CRANKSHAFT POSITION SENSOR (POS)

Refer to 

EC-378, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Replace crankshaft position sensor (POS).

9. 

CHECK GEAR TOOTH

Visually check for chipping signal plate gear tooth.

OK or NG

OK

>> GO TO 10.

NG

>> Replace the signal plate.

10. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

EC-378

DTC P0335 CKP SENSOR (POS)

Component Inspection

NBS001WG

CRANKSHAFT POSITION SENSOR (POS)

1.

Loosen the fixing bolt of the sensor.

2.

Disconnect crankshaft position sensor (POS) harness connec-
tor.

3.

Remove the sensor.

4.

Visually check the sensor for chipping.

5.

Check resistance as shown in the figure.

Removal and Installation

NBS001WH

CRANKSHAFT POSITION SENSOR (POS)

Refer to 

EM-26, "OIL PAN AND OIL STRAINER"

 .

PBIB0563E

Terminal No. (Polarity)

Resistance 

Ω

 [at 25

°

C (77

°

F)]

1 (+) - 2 (-)

Except 0 or 

∞

1 (+) - 3 (-)

2 (+) - 3 (-)

PBIB0564E