Infiniti I30 (A33). Manual — part 259

SEF252P

Component Description

NHEC0197

The camshaft position sensor (PHASE) is located on the engine
front cover facing the camshaft sprocket. It detects the cylinder No.
signal.
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the
camshaft sprocket will periodically change. Permeability near the
sensor also changes.
Due to the permeability change, the magnetic flux near the core is
changed. Therefore, the voltage signal generated in the coil is
changed.
The ECM receives the voltage signal and detects the cylinder No.
signal.

On Board Diagnosis Logic

NHEC0199

Malfunction is detected when
(Malfunction A) the cylinder No. signal is not sent to ECM for the
first few seconds during engine cranking,
(Malfunction B) the cylinder No. signal is not sent to ECM during
engine running,
(Malfunction C) the cylinder No. signal is not in the normal pattern
during engine running.

Possible Cause

NHEC0494

I

Harness or connectors
[The camshaft position sensor (PHASE) circuit is open or
shorted.]

I

Camshaft position sensor (PHASE)

I

Starter motor (Refer to SC section.)

I

Starting system circuit (Refer to SC section.)

I

Dead (Weak) battery

DTC Confirmation Procedure

NHEC0200

NOTE:

I

Perform “PROCEDURE FOR MALFUNCTION A” first. If 1st
trip DTC cannot be confirmed, perform “PROCEDURE
FOR MALFUNCTION B AND C”.

I

If

“DTC

Confirmation

Procedure”

has

been

previously

conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test.

TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V at idle.

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS) (PHASE)

Component Description

EC-351

SEF013Y

PROCEDURE FOR MALFUNCTION A

NHEC0200S01

With CONSULT-II

NHEC0200S0101

1)

Turn ignition switch “ON”.

2)

Select “DATA MONITOR” mode with CONSULT-II.

3)

Crank engine for at least 2 seconds.

4)

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-354.

With GST

NHEC0200S0102

Follow the procedure “With CONSULT-II” above.

SEF058Y

PROCEDURE FOR MALFUNCTION B AND C

NHEC0200S02

With CONSULT-II

NHEC0200S0201

1)

Turn ignition switch “ON”.

2)

Select “DATA MONITOR” mode with CONSULT-II.

3)

Start engine and run it for at least 2 seconds at idle speed.

4)

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-354.

With GST

NHEC0200S0202

Follow the procedure “With CONSULT-II” above.

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS) (PHASE)

DTC Confirmation Procedure (Cont’d)

EC-352

Wiring Diagram

NHEC0201

MEC418D

SEF857Y

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS) (PHASE)

Wiring Diagram

EC-353

Diagnostic Procedure

NHEC0202

1

CHECK STARTING SYSTEM

Turn ignition switch to “START” position.

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

Yes or No

Yes

©

GO TO 2.

No

©

Check starting system. (Refer to SC-10, “STARTING SYSTEM”.)

2

RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

©

GO TO 3.

3

CHECK CMPS (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and CMPS (PHASE) harness connector.

SEF274P

3. Check harness continuity between CMPS (PHASE) terminal 2 and ECM terminals 66, 76. Refer to Wiring Diagram.

Continuity should exist.

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

OK or NG

OK

©

GO TO 4.

NG

©

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

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS) (PHASE)

Diagnostic Procedure

EC-354