Infiniti QX56 (JA60). Manual - part 387

EC-200

< COMPONENT DIAGNOSIS >

[VK56DE]

P0327, P0328, P0332, P0333 KS

7.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors F26, F101

• Harness connectors F14, E5

• Harness for open or short between knock sensor terminal 2 and ground

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

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-35, "How to Check Terminal"

 and 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005149218

KNOCK SENSOR

Check resistance between knock sensor terminal 1 and ground.

NOTE:

It is necessary to use an ohmmeter which can measure more

than 10 M

Ω.

CAUTION:

Do not use any knock sensors that have been dropped or phys-

ically damaged. Use only new ones.

Resistance: Approximately 532 - 588 k

Ω [at 20°C (68°F)]

SEF227W

P0335 CKP SENSOR (POS)

EC-201

< COMPONENT DIAGNOSIS >

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P0335 CKP SENSOR (POS)

Component Description

INFOID:0000000005149219

The crankshaft position sensor (POS) is located on the A/T assem-

bly facing the gear teeth (cogs) of the signal plate. It detects the fluc-

tuation of the engine revolution.

The sensor consists of a permanent magnet and Hall IC.

When the engine is running, the high and low parts of the teeth

cause the gap with the sensor to change.

The changing gap causes the magnetic field near the sensor to

change.

Due to the changing magnetic field, the voltage from the sensor

changes.

The ECM receives the voltage signal and detects the fluctuation of

the engine revolution.

ECM receives the signals as shown in the figure.

On Board Diagnosis Logic

INFOID:0000000005149220

DTC Confirmation Procedure

INFOID:0000000005149221

NOTE:

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10.5 V with igni-

tion switch ON.

1. Crank engine for at least 2 seconds and run it for at least 5 seconds at idle speed.

2. Check 1st trip DTC.

3. If 1st trip DTC is detected, go to 

EC-201, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005149222

1.

CHECK GROUND CONNECTIONS

PBIB0562E

PBIB3459E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0335
0335

Crankshaft position sen-
sor (POS) circuit

• The crankshaft position sensor (POS) signal 

is not detected by the ECM during the first 
few seconds of engine cranking.

• The proper pulse signal from the crankshaft 

position sensor (POS) is not sent to ECM 
while the engine is running.

• The crankshaft position sensor (POS) signal 

is not in the normal pattern during engine run-
ning.

• Harness or connectors

(The sensor circuit is open or shorted)

• Crankshaft position sensor (POS)
• Signal plate

EC-202

< COMPONENT DIAGNOSIS >

[VK56DE]

P0335 CKP SENSOR (POS)

1. Turn ignition switch OFF.

2. Loosen and retighten three ground screws on the body.

Refer to 

EC-85, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

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-III or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors F32, E2

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

• Harness for open or short between crankshaft position sensor (POS) and IPDM E/R

>> 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

BBIA0354E

BBIA0367E

Voltage: Battery voltage

SEF481Y

Continuity should exist.

P0335 CKP SENSOR (POS)

EC-203

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OK

>> GO TO 6.

NG

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors F32, E2

• 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 7.

NG

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

7.

CHECK CRANKSHAFT POSITION SENSOR (POS)

Refer to 

EC-203, "Component Inspection"

.

OK or NG

OK

>> GO TO 8.

NG

>> Replace crankshaft position sensor (POS).

8.

CHECK GEAR TOOTH

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

OK

>> GO TO 9.

NG

>> Replace the signal plate.

9.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-35, "How to Check Terminal"

 and 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005149223

CRANKSHAFT POSITION SENSOR (POS)

1. Loosen the fixing bolt of the sensor.
2. Disconnect crankshaft position sensor (POS) harness connector.
3. Remove the sensor.
4. Visually check the sensor for chipping.

Continuity should exist.

PBIB0563E