Infiniti Q45. Manual — part 434
DTC P0335 CKP SENSOR (POS)
EC-375
C
D
E
F
G
H
I
J
K
L
M
A
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
NBS001WF
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten three ground screws on the body.
Refer to
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
C
D
E
F
G
H
I
J
K
L
M
A
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
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