Nissan Primera P11. Instruction — part 102
COMPONENT INSPECTION
Accelerator position sensor
1. Disconnect accelerator position sensor harness connector.
2. Make sure that resistance between accelerator position sen-
sor terminals
p
2
and
p
4
changes when opening throttle
valve instructionly.
Throttle valve conditions
Resistance [at 25°C (77°F)]
Completely closed
Approximately 1.2 k
Ω
Partially open
1.2 - 1.9 k
Ω
Completely open
Approximately 1.9 k
Ω
If NG, replace accelerator pedal assembly.
CAUTION:
●
Do not disassemble accelerator pedal assembly.
COMPONENT INSPECTION
Accelerator switch
1. Disconnect accelerator switch harness connector.
2. Check continuity between accelerator switch connector ter-
minals
p
1
and
p
3
.
Conditions
Continuity
Accelerator pedal released
No
Accelerator pedal depressed
Yes
If NG, replace accelerator pedal assembly.
CAUTION:
●
Do not disassemble accelerator pedal assembly.
1 2
5
4
3
M68
2
4
YEC368
Accelerator position
sensor connector
M68
1 2
5
4
3
M68
1
3
YEC369
Accelerator position
sensor connector
M68
TROUBLE DIAGNOSIS 12
CD20T
Accelerator Position Sensor & Switch
(Cont’d)
EC-113
Crankshaft Position Sensor (TDC)
The crankshaft position sensor (TDC) monitors engine speed by
means of signals from the sensing plate (with two protrusions)
installed to the crankshaft pulley. The datum signal output is
detected at ATDC 70° and sent to the ECM. The sensor signal
is used for fuel injection control and fuel injection timing control.
Malfunction is detected when .
Check Items
(Possible Cause)
●
An incorrect signal from the sensor is detected by ECM
during engine running and cranking.
●
Harness or connectors
(The sensor circuit is open.)
●
Crankshaft position sensor (TDC)
DIAGNOSTIC TROUBLE CONFIRMATION
PROCEDURE
Before performing the following procedure, confirm
that battery voltage is more than 9V.
1)
Turn ignition switch to “ON” position and select
“DATA MONITOR” mode with CONSULT-II.
2)
Start engine and run it for at least 3 seconds above
1,200 rpm.
SEF615S
Core
Magnet
Coil
SEF616S
Crank pulley
Crankshaft position
sensor (TDC)
TROUBLE DIAGNOSIS 13
CD20E
EC-114
YEC811
CRANKSHAFT POSI-
TION SENSOR (TDC)
: Detectable line for DTC
: Non-detectable line for DTC
ECM
TROUBLE DIAGNOSIS 13
CD20E
Crankshaft Position Sensor (TDC) (Cont’d)
EC-115
DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK INPUT SIGNAL CIRCUIT.
1. Turn ignition switch to “LOCK” posi-
tion.
2. Disconnect crankshaft position sen-
sor (TDC) and ECM harness con-
nectors.
3. Check continuity between ECM ter-
minal
344
and crankshaft position
sensor (TDC) connector terminal
p
3
.
Continuity should exist.
If OK, check harness for short-cir-
cuit.
OK
E
NG
Repair harness or con-
nectors.
Loosen and retighten engine ground
screws.
OK
CHECK GROUND CIRCUIT.
Check harness continuity between
crankshaft position sensor (TDC) con-
nector terminal
p
2
and ECM connec-
tor terminal
331
.
Continuity should exist.
If OK, check harness for short-circuit.
OK
E
NG
Repair harness or con-
nectors.
CHECK COMPONENT
[Crankshaft position sensor (TDC)].
Refer to “COMPONENT INSPECTION”
on next page.
OK
E
NG
Replace crankshaft posi-
tion sensor (TDC).
Disconnect and reconnect harness
connectors in the circuit. Then retest.
Trouble is not fixed
Check ECM pin terminals for damage
and check the connection of ECM har-
ness connector. Reconnect ECM har-
ness connector and retest.
INSPECTION END
SEF617S
Crankshaft position
sensor (TDC)
harness connector
NEF213A
Crankshaft position
harness connector
NEF214A
Crankshaft position
sensor connector
H
H
H
H
H
H
H
TROUBLE DIAGNOSIS 13
CD20E
Crankshaft Position Sensor (TDC) (Cont’d)
EC-116
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