2001 NISSAN PICK-UP Repair Manual

3 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M48, F54 (RHD models)
+10A fuse
+Fuse block (J/B) connectors M10, M12
+Harness for open or short between ECM and ignition switch
cRepair open circuit or short to ground or short to power in harness or connectors.
4 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3469.
cINSPECTION END
START SIGNALYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3632

Description
When the gear position is in ªNeutralº, neutral position is ªONº. ECM detects the position because the con-
tinuity of the line (the ªONº signal) exists.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
P/N POSI SW+Ignition switch: ONShift lever: Park/Neutral ON
Except above OFF
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)
22 G/ORPark/Neutral position
switchIgnition switch ªONº
Gear position is ªNeutralº (M/T models)Approximately 0V
Ignition switch ªONº
Except the above gear positionBATTERY VOLTAGE
(11 - 14V)
PARK/NEUTRAL POSITION (PNP) SWITCHYD25DDTi
EC-3633

Wiring Diagram
GEC287A
PARK/NEUTRAL POSITION (PNP) SWITCHYD25DDTi
EC-3634

Diagnostic Procedure
1 CHECK OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªP/N POSI SWº in ªDATA MONITORº mode with CONSULT-II.
3. Check ªP/N POSI SWº signal under the following conditions.
SEF049Y
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Check voltage between ECM terminal 22 and ground under the following conditions.
SEF419Y
OK or NG
OKcINSPECTION END
NGcGO TO 2.
PARK/NEUTRAL POSITION (PNP) SWITCHYD25DDTi
EC-3635

2 CHECK PNP SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect park/neutral position (PNP) switch harness connector.
SEC170D
3. Check harness continuity between PNP switch terminal 2 and body 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 4.
NGcGO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E203, E30
+Harness for open or short between PNP switch and body ground
cRepair open circuit or short to ground or short to power in harness or connectors.
4 CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 22 and PNP 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 6.
NGcGO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M278, E236 (LHD models)
+Harness connectors F35, E236 (RHD models)
+Harness for open or short between PNP switch and ECM
cRepair open circuit or short to ground or short to power in harness or connectors.
6 CHECK PARK/NEUTRAL POSITION SWITCH
Refer to MT section (ªPOSITION SWITCH CHECKº).
OK or NG
OKcGO TO 7.
NGcReplace park/neutral position switch.
PARK/NEUTRAL POSITION (PNP) SWITCHYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3636

7 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3469.
cINSPECTION END
PARK/NEUTRAL POSITION (PNP) SWITCHYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3637

Component Description
The heat up switch is located on the lower side of the instrument
panel. This switch is used to speed up the heater's operation
when the engine is cold.
When the ECM received the heat up switch ªONº signal, the
ECM increases the engine idle speed to 1,100 to 1,200 rpm to
warm up engine quickly.
This system works when all conditions listed below are met.
Heat up switch ON
Engine coolant temperature Below 105ÉC (221ÉF)
Shift lever ªPº or ªNº
Accelerator pedal Fully released
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
WARM UP SW+Ignition switch: ONHeat up switch: ON ON
Heat up switch: OFF OFF
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 CONDITIONDATA
(DC Voltage and Pulse
Signal)
59 BR/R Heat up switchIgnition switch ªONº
Heat up switch is ªOFFº.0V
Ignition switch ªONº
Heat up switch is ªONº.BATTERY VOLTAGE
(11 - 14V)
SEC235D
HEAT UP SWITCHYD25DDTi
EC-3638

Wiring Diagram
GEC150A
HEAT UP SWITCHYD25DDTi
EC-3639