Infiniti M45 (Y34). Manual — part 406

DTC P0335 CKP SENSOR (POS)

EC-313

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EC

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

ABS002JL

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten two ground screws.
Refer to

EC-141, "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)

63

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

PBIB0052E

PBIB0053E

PBIB1118E

EC-314

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.

4.

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

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M135, F105

●

Harness connectors E315, F5

●

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.

5.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E315, F5

●

Joint connector-29

●

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

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

PBIB0022E

Voltage: Battery voltage

SEF479Y

Continuity should exist.

DTC P0335 CKP SENSOR (POS)

EC-315

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EC

6.

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

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 63 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 E315, F5

●

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 CKPS (POS) SHIELD CIRCUIT FOR OPEN AND SHORT

1.

Disconnect harness connectors E315, F5.

2.

Check harness continuity between harness connector F5 terminal 2 and ground.
Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 9.

9.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E315, F5

●

Joint connector-28

●

Joint connector-29

●

Harness for open or short between harness connector F5 and ground

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

10.

CHECK CRANKSHAFT POSITION SENSOR (POS)

Refer to

EC-316, "Component Inspection"

.

OK or NG

OK

>> GO TO 11.

NG

>> Replace crankshaft position sensor (POS).

11.

CHECK GEAR TOOTH

Visually check for chipping signal plate gear tooth.
OK or NG

OK

>> GO TO 12.

NG

>> Replace the signal plate.

Continuity should exist.

Continuity should exist.

EC-316

DTC P0335 CKP SENSOR (POS)

12.

CHECK INTERMITTENT INCIDENT

Refer to

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

>> INSPECTION END

Component Inspection

ABS002JM

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

ABS002JN

CRANKSHAFT POSITION SENSOR (POS)

Refer to

EM-25, "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