2001 NISSAN PICK-UP Repair Manual

Diagnostic Procedure
1 INSPECTION START
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªSELF DIAG RESULTSº mode with CONSULT-II.
3. Touch ªERASEº.
4. Perform ªDTC Confirmation Procedureº, EC-3583, again.
5. Is the malfunction displayed again?
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory.
3. Perform ªDTC Confirmation Procedureº, EC-3583, again.
4. Perform ªDiagnostic Test Mode II (Self-diagnostic results)º.
5. Is the DTC 0802 displayed again?
Yes or No
YescGO TO 2.
NocINSPECTION END
2 REPLACE ECM
1. Replace ECM.
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to EC-3429. (Models with NATS)
3. Perform ªAccelerator Position Sensor Idle Position Learningº of ªBASIC SERVICE PROCEDUREº. Refer to EC-3427.
cINSPECTION END
DTC 0804 ECM 11YD25DDTi
EC-3584

Description
The stop lamp switch is installed to brake pedal bracket. The
switch senses brake pedal position and sends an ON-OFF sig-
nal to the ECM. The ECM uses the signal to control the fuel
injection control system.
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)
17 G/Y Stop lamp switchIgnition switch ªONº
Brake pedal fully releasedApproximately 0V
Ignition switch ªONº
Brake pedal depressedBATTERY VOLTAGE
(11 - 14V)
29 BR/RBrake pedal position
switchIgnition switch ªONº
Brake pedal fully releasedBATTERY VOLTAGE
(11 - 14V)
Ignition switch ªONº
Brake pedal depressedApproximately 0V
On Board Diagnosis Logic
Malfunction is detected when ... Check Items (Possible Cause)
+The relation between stop lamp switch signal and brake pedal
position switch signal is not in normal range during the speci-
fied brake pedal position.+Harness or connectors
(The stop lamp switch circuit or brake pedal position switch
circuit is open or shorted.)
+Stop lamp switch
+Brake pedal position switch
DTC Confirmation Procedure
WITH CONSULT-II
1) 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-3588.
WITHOUT CONSULT-II
1) Turn ignition switch ªONº.
2) Depress and release brake pedal more than 10 times.
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-3588.SEF817Y
DTC 0807 ECM 14YD25DDTi
EC-3585

Wiring Diagram
GEC282A
DTC 0807 ECM 14YD25DDTi
EC-3586

Diagnostic Procedure
1 CHECK STOP LAMP SWITCH FUNCTION
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªBRAKE SWº in ªDATA MONITORº mode with CONSULT-II.
3. Check ªBRAKE SWº signal under the following conditions.
SEC256D
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Check voltage between ECM terminal 17 and ground under the following conditions.
SEC257D
OK or NG
OKcGO TO 2.
NGcGO TO 3.
DTC 0807 ECM 14YD25DDTi
EC-3587

2 CHECK BRAKE PEDAL POSITION SWITCH FUNCTION
With CONSULT-II
1. Select ªBRAKE SW2º in ªDATA MONITORº mode with CONSULT-II.
2. Check ªBRAKE SW2º signal under the following conditions.
SEC258D
Without CONSULT-II
Check voltage between ECM terminal 29 and ground under the following conditions.
SEC259D
OK or NG
OKcGO TO 14.
NGcGO TO 9.
3 CHECK STOP LAMP SWITCH CIRCUIT
Check the stop lamp when depressing and releasing the stop lamp switch.
MTBL0443
OK or NG
OKcGO TO 6.
NGcGO TO 4.
DTC 0807 ECM 14YD25DDTi
Diagnostic Procedure (Cont'd)
EC-3588

4 CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect stop lamp switch harness connector.
SEC233D
3. Turn ignition switch ªONº.
4. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.
SEF435Y
OK or NG
OKcGO TO 6.
NGcGO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+10A fuse
+Harness for open or short between stop lamp switch and fuse
cRepair open circuit or short to ground or short to power in harness or connectors.
DTC 0807 ECM 14YD25DDTi
Diagnostic Procedure (Cont'd)
EC-3589

6 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.
SEC233D
4. Check harness continuity between ECM terminal 17 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
OKcGO TO 8.
NGcGO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M48, F54 (RHD models)
+Harness for open or short between stop lamp switch and ECM
cRepair open circuit or short to ground or short to power in harness or connectors.
8 CHECK STOP LAMP SWITCH
Check continuity between stop lamp switch terminal 1 and 2 under the following conditions.
SEC260D
OK or NG
OKcGO TO 14.
NGcReplace stop lamp switch.
DTC 0807 ECM 14YD25DDTi
Diagnostic Procedure (Cont'd)
EC-3590

9 CHECK BRAKE PEDAL POSITION SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect brake pedal position switch harness connector.
SEC233D
3. Check harness continuity between brake pedal position switch terminal 2 and 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 11.
NGcGO TO 10.
10 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M48, F54 (RHD models)
+Harness for open or short between brake pedal position switch and ground
cRepair open circuit or short to ground or short to power in harness or connectors.
11 CHECK BRAKE PEDAL POSITION SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 29 and brake pedal position switch terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 13.
NGcGO TO 12.
12 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors F55, M47 (RHD models)
+Harness for open or short between brake pedal position switch and ECM
cRepair open circuit or short to ground or short to power in harness or connectors.
DTC 0807 ECM 14YD25DDTi
Diagnostic Procedure (Cont'd)
EC-3591