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
.
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
.
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
I
J
K
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
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
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
.)
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
E
F
G
H
I
J
K
L
M
A
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
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace malfunctioning component.
6.
CHECK APP SENSOR
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
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
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
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