NISSAN PICK-UP 2001 Repair Manual

ECM Terminals and Reference Value
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 damage the
ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
23 WAccelerator position sen-
sorIgnition switch ªONº
Accelerator pedal fully released0.29 - 0.79V
Ignition switch ªONº
Accelerator pedal fully depressed3.48 - 4.64V
31 YAccelerator position switch
(Idle)Ignition switch ªONº
Accelerator pedal fully releasedBATTERY VOLTAGE
(11 - 14V)
Ignition switch ªONº
Accelerator pedal depressedApproximately 0V
32 GAccelerator position switch
(Full)Ignition switch ªONº
Accelerator pedal releasedApproximately 0V
Ignition switch ªONº
Accelerator pedal fully depressedBATTERY VOLTAGE
(11 - 14V)
48 OR/LAccelerator position sen-
sor power supplyIgnition switch ªONº
Approximately 5V
51 B/WAccelerator position sen-
sor groundEngine is running.
Warm-up condition
Idle speedApproximately 0V
On Board Diagnosis Logic
Malfunction is detected when ... Check Items (Possible Cause)
+The relation between sensor and switch signal is not in the
normal range during the specified accelerator position.+Harness or connectors
(The sensor circuit is open or shorted.)
+Accelerator position sensor
+Accelerator position switch
DTC 0403 ACCEL POS SENSORYD25DDTi
EC-3516

DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Depress and release fully accelerator pedal slowly.
4) If DTC is detected, go to ªDiagnostic Procedureº, EC-3523.
WITHOUT CONSULT-II
1) Turn ignition switch ªONº.
2) Depress and release fully accelerator pedal slowly.
3) Turn ignition switch ªOFFº, wait at least 5 seconds and then
turn ªONº.
4) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º
with ECM.
5) If DTC is detected, go to ªDiagnostic Procedureº, EC-3523.SEF817Y
DTC 0403 ACCEL POS SENSORYD25DDTi
EC-3517

Wiring Diagram
LHD MODELS
GEC277A
DTC 0403 ACCEL POS SENSORYD25DDTi
EC-3518

GEC278A
DTC 0403 ACCEL POS SENSORYD25DDTi
Wiring Diagram (Cont'd)
EC-3519

RHD MODELS
GEC279A
DTC 0403 ACCEL POS SENSORYD25DDTi
Wiring Diagram (Cont'd)
EC-3520

GEC280A
DTC 0403 ACCEL POS SENSORYD25DDTi
Wiring Diagram (Cont'd)
EC-3521

Diagnostic Procedure
1 CHECK OVERALL FUNCTION-I
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªACCEL POS SENº in ªDATA MONITORº mode with CONSULT-II.
3. Check ªACCEL POS SENº signal under the following conditions.
SEF278ZB
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Check voltage between ECM terminal 23 and ground under the following conditions.
SEF279ZB
OK or NG
OKcGO TO 2.
NGcGO TO 3.
DTC 0403 ACCEL POS SENSORYD25DDTi
EC-3522

2 CHECK OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªFULL ACCEL SWº and ªOFF ACCEL SWº in ªDATA MONITORº mode with CONSULT-II.
3. Check ªFULL ACCEL SWº and ªOFF ACCEL SWº signal under the following conditions.
SEF416Y
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Check voltage between ECM terminals 31, 32 and ground under the following conditions.
SEF417Y
OK or NG
OKcGO TO 24.
NGcGO TO 15.
DTC 0403 ACCEL POS SENSORYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3523

3 CHECK ACCELERATOR POSITION SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect accelerator work unit harness connector.
SEC233D
3. Turn ignition switch ªONº.
4. Check voltage between accelerator work unit terminal 1 and ground with CONSULT-II or tester.
SEC244D
OK or NG
OKcGO TO 5.
NGcGO TO 4.
4 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors F54, M48 (RHD models)
+Harness for open or short between ECM and accelerator work unit
cRepair harness or connectors.
DTC 0403 ACCEL POS SENSORYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3524

5 CHECK ACCELERATOR POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screw.
SEC245D
3. Check harness continuity between accelerator work unit terminal 3 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 7.
NGcGO TO 6.
6 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors F54, M48 (RHD models)
+Harness for open or short between ECM and accelerator work unit
cRepair open circuit or short to ground or short to power in harness or connectors.
7 CHECK ACCELERATOR POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 23 and accelerator work unit terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK (With CONSULT-II)cGO TO 9.
OK (Without CONSULT-II)cGO TO 10.
NGcGO TO 8.
8 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors F55, M47 (RHD models)
+Harness for open or short between ECM and accelerator work unit
cRepair open circuit or short to ground or short to power in harness or connectors.
DTC 0403 ACCEL POS SENSORYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3525