Nissan Primera P11. Manual — part 168
Wiring Diagram
NCEC0210
YEC269
Detectable line for DTC
Non-detectable line for DTC
ECM
KNOCK
SENSOR
DTC P0325 KNOCK SENSOR (KS)
QG16
I
18DE
Wiring Diagram
EC-229
Diagnostic Procedure
NCEC0211
1
RETIGHTEN GROUND SCREWS
Loosen and retighten engine ground screws.
SEF994W
©
GO TO 2.
2
CHECK INPUT SIGNAL CIRCUIT-1
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and knock sensor harness connector.
SEF056X
3. Check harness continuity between knock sensor signal terminal 2 and ECM terminal 81.
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
©
GO TO 3.
3
DETECT MALFUNCTIONING PART
Check the harness for open or short between knock sensor and ECM.
©
Repair open circuit or short to ground or short to power in harness or connectors.
4
CHECK KNOCK SENSOR
Knock sensor
Refer to “Component Inspection”, EC-QG-231.
OK or NG
OK
©
GO TO 5.
NG
©
Replace knock sensor.
View from the underside of the vehicle
Knock sensor
harness
connector
Oil filter
DTC P0325 KNOCK SENSOR (KS)
QG16
I
18DE
Diagnostic Procedure
EC-230
5
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-QG-102.
©
INSPECTION END
Component Inspection
NCEC0212
KNOCK SENSOR
NCEC0212S01
I
Use an ohmmeter which can measure more than 10 M
Ω
.
1.
Disconnect knock sensor harness connector.
2.
Check resistance between terminal 2 and ground.
Resistance: 500 - 620 k
Ω
[at 25°C (77°F)]
CAUTION:
Discard any knock sensors that have been dropped or physi-
cally damaged. Use only new ones.
SEF057X
DTC P0325 KNOCK SENSOR (KS)
QG16
I
18DE
Diagnostic Procedure (Cont’d)
EC-231
Component Description
NCEC0551
The crankshaft position sensor is located on the right rear wall of
the cylinder block in relation to the signal plate on the No. 6 coun-
terweight.
The crankshaft position sensor is a basic component of the engine
control system. It monitors engine speed, piston position, and fluc-
tuation of the engine revolution. These input signals to the engine
control system are used to control fuel injection, ignition timing and
other functions.
The sensor consists of a permanent magnet, core and coil.
When the engine is running, the high and low parts of the teeth
cause the gap with the sensor to change.
The signal plate is provided with 34 teeth to emit a signal at an
interval of 10° during crankshaft operations. However, it is not pro-
vided with 2 teeth to emit a signal at an interval of 180°.
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 a voltage signal to provide “time processing” for
engine speed, piston position and fluctuation of engine revolutions.
This sensor is not used to control the engine system. It is used only
for the on board diagnosis.
ECM Terminals and Reference Value
NCEC0552
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 (AC Voltage)
85
W
Crankshaft position
sensor
[Engine is running]
I
Warm-up condition
I
Idle speed
3 - 4V
SEF979W
[Engine is running]
I
Engine speed is 2,000 rpm
3 - 4V
SEF980W
SEF058X
SEF117X
DTC P0335 CRANKSHAFT POSITION SENSOR (POS)
QG16
I
18DE
Component Description
EC-232
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