Infiniti I30. Emission Control System (2003 year). Manual

SEF332I

Component Description

NHEC0932

The knock sensor is attached to the cylinder block. It senses
engine knocking using a piezoelectric element. A knocking vibration
from the cylinder block is sensed as vibrational pressure. This
pressure is converted into a voltage signal and sent to the ECM.

On Board Diagnosis Logic

NHEC0934

The MIL will not light for these self-diagnoses.

DTC No.

Trouble diagnosis

name

DTC Detecting Condition

Possible Cause

P0327
0327

Knock sensor circuit
low input

An excessively low voltage from the sensor is sent
to ECM.

쐌

Harness or connectors
(The sensor circuit is open or
shorted.)

쐌

Knock sensor

P0328
0328

Knock sensor circuit
high input

An excessively high voltage from the sensor is
sent to ECM.

SEF058Y

DTC Confirmation Procedure

NHEC0935

NOTE:
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 10V at idle.

WITH CONSULT-II

NHEC0935S01

Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II

Start engine and run it for at least 5 seconds at idle speed.

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-307.

WITH GST

NHEC0935S03

Follow the procedure “With CONSULT-II” above.

IDX

DTC P0327, P0328 KS

Component Description

EC-305

Diagnostic Procedure

NHEC0937

CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check resistance between ECM terminal 71 and engine ground.

NOTE:
It is necessary to use an ohmmeter which can measure more than 10 M

Ω

SEC118D

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

OK or NG

䊳

GO TO 5.

䊳

GO TO 2.

CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II

1. Disconnect knock sensor harness connector.
2. Check harness continuity between ECM terminal 71 and knock sensor terminal 1. Refer to Wiring Diagram.

Continuity should exist.

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

OK or NG

䊳

GO TO 4.

䊳

GO TO 3.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors F8, F131

쐌

Harness for open or short between ECM and knock sensor

䊳

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

IDX

DTC P0327, P0328 KS

Diagnostic Procedure

EC-307

CHECK 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

SEC119D

CAUTION:

Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.

OK or NG

䊳

GO TO 8.

䊳

Replace knock sensor.

RETIGHTEN GROUND SCREWS

Loose and retighten engine ground screws.

SEC047D

䊳

GO TO 6.

CHECK KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT

1. Disconnect harness connectors F8, F131.
2. Check harness continuity between harness connector F8 terminal 2 and engine ground.

Continuity should exist.

3. Also check harness for short to power.

OK or NG

䊳

GO TO 8.

䊳

GO TO 7.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors F8, F131

쐌

Joint connector-18

쐌

Harness for open or short between harness connector F8 and engine ground

䊳

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

DTC P0327, P0328 KS

Diagnostic Procedure (Cont’d)

EC-308

CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.

䊳

INSPECTION END

IDX

DTC P0327, P0328 KS

Diagnostic Procedure (Cont’d)

EC-309

PBIB0562E

Component Description

NHEC0938

The crankshaft position sensor (POS) is located on the oil pan
facing the gear teeth (cogs) of the signal plate at the end of the
crankshaft. It detects the fluctuation 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 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.

CONSULT-II Reference Value in Data Monitor
Mode

NHEC0939

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

ENG SPEED

쐌

Tachometer: Connect

쐌

Run engine and compare tachometer indication with the CONSULT-II
value.

Almost the same speed as the
CONSULT-II value.

On Board Diagnosis Logic

NHEC0941

DTC No.

Trouble diagnosis

name

DTC Detecting Condition

Possible Cause

P0335
0335

Crankshaft position
sensor (POS) circuit

쐌

The crankshaft position sensor signal is
not detected by the ECM during the first
few seconds of engine cranking.

쐌

The proper pulse signal from the crank-
shaft position sensor (POS) is not sent to
ECM while the engine is running.

쐌

The crankshaft position sensor signal is
not in the normal pattern during engine
running.

쐌

Harness or connectors
[The crankshaft position sensor (POS)
circuit is open or shorted.]

쐌

Crankshaft position sensor (POS)

쐌

Signal plate

DTC P0335 CKP SENSOR (POS)

Component Description

EC-310

SEF058Y

DTC Confirmation Procedure

=NHEC0942

With CONSULT-II

Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.

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

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-313.
If 1st trip DTC is not detected, go to next step.

Maintaining engine speed at more than 1,000 rpm for at least
5 seconds.

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-313

With GST

Follow the procedure “With CONSULT-II” above.

IDX

DTC P0335 CKP SENSOR (POS)

DTC Confirmation Procedure

EC-311

Specification data are reference values and are measured between each terminal and ground.

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.

TERMI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Crankshaft position
sensor (POS)

[Engine is running]

쐌

Idle speed

NOTE:
The pulse cycle changes depending on rpm at idle.

Approximately 2.4V

★

SEC035D

[Engine is running]

쐌

Engine speed is 2,000 rpm.

Approximately 2.3V

★

SEC036D

★

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

Diagnostic Procedure

NHEC0944

RETIGHTEN GROUND SCREWS

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

SEC047D

䊳

GO TO 2.

IDX

DTC P0335 CKP SENSOR (POS)

Wiring Diagram (Cont’d)

EC-313

CHECK CKP SENSOR (POS) POWER SUPPLY CIRCUIT

1. Disconnect harness connectors F25, F171.

SEF511WB

2. Turn ignition switch “ON”.
3. Check voltage between harness connector F25 terminal 4 and ground with CONSULT-II or tester.

SEF323X

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

OK or NG

䊳

GO TO 4.

䊳

GO TO 3.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors F25, F171

쐌

Harness connectors E15, F18

쐌

Harness for open or short between ECM and harness connector F25

쐌

Harness for open or short between ECM relay and harness connector F25

䊳

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

CHECK CKP SENSOR (POS) GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Check harness continuity between harness connector F25 terminal 2 and engine ground. Refer to Wiring Diagram.

Continuity should exist.

3. Also check harness for short to power.

OK or NG

䊳

GO TO 6.

䊳

GO TO 5.

DTC P0335 CKP SENSOR (POS)

Diagnostic Procedure (Cont’d)

EC-314

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors F25, F171

쐌

Harness for open between harness connector F25 and ground

䊳

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

CHECK CKP SENSOR (POS) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 95 and harness connector F25 terminal 1.

Refer to Wiring Diagram.

Continuity should exist.

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

OK or NG

䊳

GO TO 8.

䊳

GO TO 7.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors F25, F171

쐌

Harness for open or short between ECM and harness connector F25

䊳

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

CHECK CKP SENSOR (POS) SUB-HARNESS CIRCUIT FOR OPEN AND SHORT

1. Disconnect CKP sensor (POS) harness connector.

SEC137D

2. Check harness continuity between CKP sensor (POS) terminals and harness connector F171 terminals as follows.

MTBL1191

Continuity should exist.

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

OK or NG

䊳

GO TO 9.

䊳

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

IDX

DTC P0335 CKP SENSOR (POS)

Diagnostic Procedure (Cont’d)

EC-315

CHECK CRANKSHAFT POSITION SENSOR (POS)

Refer to “Component Inspection”, EC-316.

OK or NG

䊳

GO TO 10.

䊳

Replace crankshaft position sensor (POS).

CHECK GEAR TOOTH

Visually check for chipping signal plate gear tooth.

OK or NG

䊳

GO TO 11.

䊳

Replace the signal plate.

CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.

䊳

INSPECTION END

PBIB0563E

Component Inspection

NHEC1415

CRANKSHAFT POSITION SENSOR (POS)

NHEC1415S01

Loosen the fixing bolt of the sensor.

Disconnect crankshaft position sensor (POS) harness connec-
tor.

Remove the sensor.

Visually check the sensor for chipping.

SEC173D

Check resistance as shown in the figure.

Terminal No. (Polarity)

Resistance

Ω

[at 25°C (77°F)]

1 (+) - 2 (−)

Except 0 or

∞

1 (+) - 3 (−)

2 (+) - 3 (−)

DTC P0335 CKP SENSOR (POS)

Diagnostic Procedure (Cont’d)

EC-316

PBIB0562E

Component Description

NHEC0945

The camshaft position sensor (PHASE) senses the retraction with
intake valve camshaft to identify a particular cylinder. The crank-
shaft position sensor (POS) senses the piston position. When the
crankshaft position sensor (POS) system becomes inoperative, the
camshaft position sensor (PHASE) provides various controls of
engine parts instead, utilizing timing of cylinder identification sig-
nals. The sensor consists of a permanent magnet and Hall IC.
When 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.

On Board Diagnosis Logic

NHEC0947

DTC No.

Trouble diagnosis

name

DTC Detecting Condition

Possible Cause

P0340
0340
(Bank 1)
P0345
0345
(Bank 2)

Camshaft position sen-
sor (PHASE) circuit

쐌

The cylinder No. signal is not sent to ECM
for the first few seconds during engine
cranking.

쐌

The cylinder No. signal is not sent to ECM
during engine running.

쐌

The cylinder No. signal is not in the normal
pattern during engine running.

쐌

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

쐌

Camshaft position sensor (PHASE)

쐌

Camshaft (Intake)

쐌

Starter motor (Refer to SC section.)

쐌

Starting system circuit (Refer to SC
section.)

쐌

Dead (Weak) battery

DTC Confirmation Procedure

NHEC0948

IDX

DTC P0340, P0345 CMP SENSOR (PHASE)

Component Description

EC-317

SEF013Y

WITH CONSULT-II

NHEC0948S03

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

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

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-321. If 1st trip DTC is not detected, go to next step.

Maintaining engine speed at more than 1,000 rpm for at least
5 seconds.

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-321.

WITH GST

NHEC0948S04

Follow the procedure “With CONSULT-II” above.

DTC P0340, P0345 CMP SENSOR (PHASE)

DTC Confirmation Procedure (Cont’d)

EC-318

Wiring Diagram

NHEC0949

BANK 1

NHEC0949S01

MEC573D

IDX

DTC P0340, P0345 CMP SENSOR (PHASE)

Wiring Diagram

EC-319

Infiniti I30. Emission Control System (2003 year). Manual - part 20