Infiniti QX56 (Z62). Manual - part 581

EC-302

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0335 CKP SENSOR

5.

Visually check the sensor for chipping.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace crankshaft position sensor. Refer to 

EM-57,

"Exploded View"

.

2.

CHECK CRANKSHAFT POSITION SENSOR-II

Check resistance between crankshaft position sensor terminals as per the following.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace crankshaft position sensor. Refer to 

EM-57, "Exploded View"

.

JMBIA0063ZZ

Terminals (Polarity)

Resistance

1 (+) - 2 (-)

Except 0 or 

∞

 

Ω

 [at 25

°

C (77

°

F)]

1 (+) - 3 (-)

2 (+) - 3 (-)

P0340, P0345 CMP SENSOR

EC-303

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

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J

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L

M

A

EC

N

P

O

P0340, P0345 CMP SENSOR

DTC Logic

INFOID:0000000006217848

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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 10.5 V or more with ignition
switch ON.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE-I

1.

Start engine and let it idle for at least 5 seconds.
If engine does not start, crank engine for at least 2 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-304, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-I

1.

Maintain engine speed at more than 800 rpm for at least 5 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0340

CMP SEN/CIRC-B1
[Camshaft position sensor 
(bank 1) circuit]

• The cylinder No. signal is not sent to 

ECM for the first few seconds during 
engine cranking.

• The cylinder No. signal is not sent to 

ECM during engine running.

• The cylinder No. signal is not in the 

normal pattern during engine running.

• Harness or connectors

[Camshaft position sensor (bank 1) circuit is 
open or shorted.]
(APP sensor 2 circuit is shorted.)
(Battery current sensor circuit is shorted.)
[Crankshaft position sensor circuit is shorted.]
(Refrigerant pressure sensor circuit is open or 
shorted.)
(EVAP control system pressure sensor circuit 
is open or shorted.)

• Camshaft position sensor (bank 1)
• Accelerator pedal position sensor
• Battery current sensor
• Crankshaft position sensor
• Refrigerant pressure sensor
• EVAP control system pressure sensor
• Camshaft (INT)
• Starter  motor
• Starting system circuit
• Dead (Weak) battery

P0345

CMP SEN/CIRC-B2
[Camshaft position sensor 
(bank 2) circuit]

• Harness or connectors

[Camshaft position sensor (bank 2) circuit is 
open or shorted.]

• Camshaft position sensor (bank 2)
• Camshaft (INT)
• Starter  motor
• Starting system circuit
• Dead (Weak) battery

EC-304

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0340, P0345 CMP SENSOR

YES

>> Go to 

EC-304, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217849

1.

CHECK STARTING SYSTEM

Turn ignition switch to START position.

Does the engine turn over? Does the starter motor operate?

YES

>> GO TO 2.

NO

>> Check starting system. (Refer to 

STR-11, "Work Flow"

.)

2.

CHECK CAMSHAFT POSITION SENSOR POWER SUPPLY CIRCUIT-I

1.

Disconnect camshaft position (CMP) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between CMP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO-1

>> P0340: GO TO 3.

NO-2

>> P0345: Repair open circuit, short to ground or short to power in harness or connectors.

3.

CHECK CMP SENSOR POWER SUPPLY CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between CMP sensor harness connector and ECM harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit.

4.

CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

Is the inspection result normal?

YES

>> GO TO 5.

DTC

CMP sensor

Ground

Voltage (V)

Bank

Connector

Terminal

P0340

1

F84

1

Ground

Approx. 5

P0345

2

F83

1

CMP sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

1

F84

1

F110

77

Existed

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F110

76

CKP sensor

F74

1

77

Camshaft position sensor (bank 1)

F84

1

E80

131

APP sensor 2 (Without ICC)

E110

1

APP sensor 2 (With ICC)

E67

9

133

Battery current sensor

E63

2

Refrigerant pressure sensor

E77

1

EVAP control system pressure sen-
sor

C17

3

P0340, P0345 CMP SENSOR

EC-305

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

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F

G

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EC

N

P

O

NO

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

5.

CHECK COMPONENTS

Check the following.
• Battery current sensor (Refer to 

EC-414, "Component Inspection (Battery Current Sensor)"

.)

• Crankshaft position sensor (Refer to 

EC-301, "Component Inspection (Crankshaft Position Sensor)"

.)

• Refrigerant pressure sensor (Refer to 

EC-520, "Component Function Check"

.)

• EVAP control system pressure sensor (Refer to 

EC-335, "Component Inspection (EVAP Control System

Pressure Sensor)"

.)

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace malfunctioning component.

6.

CHECK APP SENSOR

Refer to 

EC-470, "Component Inspection (Accelerator Pedal Position Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 7.

7.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Refer to 

ACC-3, "MODELS WITHOUT DISTANCE CONTROL ASSIST

SYSTEM : Removal and Installation"

 (Without distance control assist system) or 

ACC-4, "MODELS WITH

DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation"

 (With distance control assist system).

>> INSPECTION END

8.

CHECK CMP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between CMP sensor harness connector and ECM harness connector.

4.

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

Is the inspection result normal?

YES

>> GO TO 9.

NO

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

9.

CHECK CMP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between CMP sensor harness connector and ECM harness connector.

2.

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

Is the inspection result normal?

YES

>> GO TO 10.

NO

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

10.

CHECK CAMSHAFT POSITION SENSOR

Refer to 

EC-306, "Component Inspection (Camshaft Position Sensor)"

.

Is the inspection result normal?

DTC

CMP sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0340

1

F84

2

F110

68

Existed

P0345

2

F83

2

99

DTC

CMP sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0340

1

F84

3

F110

95

Existed

P0345

2

F83

3

73