2001 NISSAN ALMERA ignition

11 CHECK ACCELERATOR POSITION SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect accelerator work unit harness connector.
SEF886Y
3. Turn ignition switch ªONº.
4. Check voltage between accelerator work unit terminal 3 and ground with CONSULT-II or tester.
SEF912Y
OK or NG
OK©GO TO 13.
NG©GO TO 12.
12 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M74, F112 or M64, F103
+Harness for open or short between accelerator work unit and ECM
©Repair harness or connectors.
13 CHECK ACCELERATOR POSITION SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between accelerator work unit terminal 1 and ECM terminal 426. 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 15.
NG©GO TO 14.
14 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M74, F112 or M64, F103
+Harness for open or short between ECM and accelerator work unit
©Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0120 ACCEL POS SENSORYD
Diagnostic Procedure (Cont'd)
EC-693

SEF817Y
DTC Confirmation ProcedureNJEC0690Before performing the following procedure, confirm that bat-
tery voltage is more than 10V.
WITH CONSULT-IINJEC0690S011) Turn ignition switch ªONº and select ªDATA MONITORº mode
with CONSULT-II.
2) Crank engine for at least 1 second.
3) Start engine and run it for at least 2 seconds at idle speed.
4) If DTC is detected, go to ªDiagnostic Procedureº, EC-698.
WITHOUT CONSULT-IINJEC0690S021) Crank engine for at least 1 second.
2) Start engine and run it for at least 2 seconds at idle speed.
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-698.
DTC P0335 CRANK POS SEN (TDC)YD
DTC Confirmation Procedure
EC-696

Diagnostic ProcedureNJEC0692
1 CHECK CRANKSHAFT POSITION SENSOR (TDC) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screws.
SEF380Y
3. Disconnect crankshaft position sensor (TDC) harness connector and ECM harness connector.
SEF387Y
4. Check harness continuity between ECM terminal 331 and crankshaft position sensor (TDC) terminal 1. Refer to Wiring
Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 2.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
2 CHECK CRANKSHAFT POSITION SENSOR (TDC) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between crankshaft position sensor (TDC) terminal 2 and ECM terminal 344. Refer to Wiring
Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 3.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0335 CRANK POS SEN (TDC)YD
Diagnostic Procedure
EC-698

Diagnostic ProcedureNJEC0659
1 CHECK VEHICLE SPEED SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector and combination meter harness connector.
3. Check harness continuity between ECM terminal 417 and combination meter terminal 4 or 39 or 57. 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 3.
NG©GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M63, F102
+Harness for open or short between ECM and combination meter
©Repair open circuit or short to ground or short to power in harness or connectors.
3 CHECK SPEEDOMETER FUNCTION
Make sure that speedometer functions properly.
OK or NG
OK©GO TO 5.
NG©GO TO 4.
4 CHECK SPEEDOMETER CIRCUIT FOR OPEN AND SHORT
Check the following.
+Harness connectors M63, F102
+Harness for open or short between vehicle speed sensor and engine ground
+Harness for open or short between combination meter and vehicle speed sensor
OK or NG
OK©Check vehicle speed sensor and combination meter. Refer to EL section.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
5 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-665.
©INSPECTION END
DTC P0500 VEHICLE SPEED SENYD
Diagnostic Procedure
EC-705

SEF893Y
DescriptionNJEC0738The stop lamp switch is installed to brake pedal bracket. The switch
senses brake pedal position and sends an ON-OFF signal to the
ECM. The ECM uses the signal to control the fuel injection control
system.
ECM Terminals and Reference ValueNJEC0739Specification 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
COLORITEM CONDITION DATA (DC Voltage)
405 R/G Stop lamp switch[Ignition switch ªONº]
+Brake pedal fully releasedApproximately 0V
[Ignition switch ªONº]
+Brake pedal depressedBATTERY VOLTAGE
(11 - 14V)
416 Y/BBrake pedal position
switch[Ignition switch ªONº]
+Brake pedal fully releasedBATTERY VOLTAGE
(11 - 14V)
[Ignition switch ªONº]
+Brake pedal depressedApproximately 0V
On Board Diagnosis LogicNJEC0740
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1571
0807+An irregular voltage signal from the switch is sent
to ECM.+Harness or connectors
(The stop lamp switch circuit is open or shorted.)
+Stop lamp switch
SEF817Y
DTC Confirmation ProcedureNJEC0741WITH CONSULT-IINJEC0741S011) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Depress and release brake pedal more than 10 times.
4) If DTC is detected, go to ªDiagnostic Procedureº, EC-710.
WITHOUT CONSULT-IINJEC0741S021) Turn ignition switch ªONº.
2) Depress and release brake pedal more than 10 times.
DTC P0571 BRAKE SWYD
Description
EC-706

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-710.
DTC P0571 BRAKE SWYD
DTC Confirmation Procedure (Cont'd)
EC-707

Diagnostic ProcedureNJEC0743
1 CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch ªOFFº.
2. Check the stop lamp when depressing and releasing the stop lamp switch.
MTBL0443
OK or NG
OK©GO TO 4.
NG©GO TO 2.
2 CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch harness connector.
SEF893Y
2. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.
SEF435Y
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
+Fuse block (J/B) connector M2
+10A fuse
+Harness for open and short between stop lamp switch and fuse
©Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0571 BRAKE SWYD
Diagnostic Procedure
EC-710

4 CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Disconnect stop lamp switch harness connector.
SEF893Y
4. Check harness continuity between ECM terminal 405 and stop lamp switch terminal 2. Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M74, F112 or M64, F103
+Harness for open or short between ECM and stop lamp switch
©Repair open circuit or short to ground or short to power in harness or connectors.
6 CHECK STOP LAMP SWITCH
Check continuity between stop lamp switch terminals 1 and 2 under the following conditions.
SEF904Y
OK or NG
OK©GO TO 7.
NG©Replace stop lamp switch.
DTC P0571 BRAKE SWYD
Diagnostic Procedure (Cont'd)
EC-711