NISSAN PICK-UP 2001 Repair Manual

Wiring DiagramNEEC0450
GEC257A
POWER STEERING OIL PRESSURE
SWITCH
KA24DE (EURO OBD)
Wiring Diagram
EC-3386

Diagnostic Procedure=NEEC0454
1 INSPECTION START
Do you have CONSULT-II?
YesorNo
Ye s©GO TO 2.
No©GO TO 3.
2 CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Check ªPW/ST SIGNALº in ªDATA MONITORº mode with CONSULT-II under the following conditions.
LEC065A
OK or NG
OK©INSPECTION END
NG©GO TO 4.
3 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine.
2. Check voltage between ECM terminal 39 and ground under the following conditions.
SEF662P
MTBL0142
OK or NG
OK©INSPECTION END
NG©GO TO 4.
POWER STEERING OIL PRESSURE
SWITCH
KA24DE (EURO OBD)
Diagnostic Procedure
EC-3387

4 CHECK INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 39 and terminal 1. 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 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M5, E101
Check the harness for open or short between ECM and power steering oil pressure switch.
©Repair open circuit or short to ground or short to power in harness or connectors.
6 CHECK GROUND CIRCUIT
1. Disconnect power steering oil pressure switch harness connector.
2. Check continuity between power steering oil pressure switch harness connector terminal 2 and ground.
Continuity should exist.
OK or NG
OK©
NG©Repair open circuit or short to power in harness or connectors.
7 CHECK POWER STEERING OIL PRESSURE SWITCH
1. Disconnect power steering oil pressure switch harness connector then start engine.
2. Check continuity between terminals 1 and ground. Refer to wiring diagram.
MTBL0307
OK or NG
OK©GO TO 8.
NG©Replace power steering oil pressure switch.
8 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3123.
©INSPECTION END
POWER STEERING OIL PRESSURE
SWITCH
KA24DE (EURO OBD)
Diagnostic Procedure
EC-3388

SEF342V
Component DescriptionNEEC0462When the air conditioner is on, the IACV-FICD solenoid valve sup-
plies additional air to adjust to the increased load.
ECM Terminals and Reference ValueNEEC0463Specification 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)
12 G/W Air conditioner relay[Engine is running]
+Both A/C switch and blower switch are ONHApproximately 0V
[Engine is running]
+A/C switch is OFFBATTERY VOLTAGE
(11 - 14V)
HAmbient air temperature above 10ÉC (50ÉF) and in any mode except OFF.
IACV-FICD SOLENOID VALVEKA24DE (EURO OBD)
Component Description
EC-3389

Wiring DiagramNEEC0461MODEL WITH MANUAL AIR CONDITIONERNEEC0461S01
GEC258A
IACV-FICD SOLENOID VALVEKA24DE (EURO OBD)
Wiring Diagram
EC-3390

MODEL WITH AUTO AIR CONDITIONERNEEC0461S02
GEC259A
IACV-FICD SOLENOID VALVEKA24DE (EURO OBD)
Wiring Diagram
EC-3391

Diagnostic Procedure=NEEC0464
1 CHECK OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
700±50 rpm
If NG, adjust idle speed.
3. Push air conditioner switch ON and turn fan switch to 4-speed.
4. Recheck idle speed.
MEF634E
850 rpm or more
OK or NG
OK©INSPECTION END
NG©GO TO 2.
2 CHECK AIR CONDITIONER FUNCTION
Check if air conditioner compressor functions normally.
OK or NG
OK©GO TO 3.
NG©Refer to ªSymptom Tableº in ªTROUBLE DIAGNOSISº, HA section.
IACV-FICD SOLENOID VALVEKA24DE (EURO OBD)
Diagnostic Procedure
EC-3392

3 CHECK POWER SUPPLY
1. Stop engine.
2. Disconnect IACV-FICD solenoid valve harness connector.
SEF342V
3. Start engine, then push A/C switch ON and turn fan switch to 4-speed.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester.
SEC281D
Voltage: Battery voltage
OK or NG
OK©GO TO 5.
NG©GO TO 4.
4 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E101, M5
+Harness for open or short between IACV-FICD solenoid valve and air conditioner relay
©Repair open circuit, short to ground or short to power in harness or connectors.
IACV-FICD SOLENOID VALVEKA24DE (EURO OBD)
Diagnostic Procedure
EC-3393

5 CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check harness continuity as follows.
MTBL1310
Continuity should exist.
3. Also check harness for short to ground or short to power.
OK or NG
OK©GO TO 7.
NG©GO TO 6.
6 DETECT MALFUNCTIONING PART
MANUAL AIR CONDITIONER
Check the following.
+Harness connectors E101, M5
+IACV-FICD solenoid valve
+Ambient temperature switch
+Diode M83
+Harness connectors M5, E101
+Check the harness for open or short between air conditioner relay and ambient temperature switch
+Check the harness for open or short between diode M83 and ECM
+Check the harness for open or short between ambient temperature switch and ECM
+Check the harness for open or short between ambient temperature switch and ground
AUTO AIR CONDITIONER
Check the following.
+Harness connectors E101, M5
+IACV-FICD solenoid valve
+Diode M83
+Check the harness for open or short between air conditioner relay and ECM
+Check the harness for open or short between diode and A/C auto amp
+Check the harness for open or short between A/C auto amp and ECM
©Repair open circuit or short to power in harness or connectors.
IACV-FICD SOLENOID VALVEKA24DE (EURO OBD)
Diagnostic Procedure
EC-3394

7 CHECK IACV-FICD SOLENOID VALVE
Disconnect IACV-FICD solenoid valve harness connector.
SEC282D
+Check for clicking sound when applying 12V direct current to terminals.
+Check plunger for seizing or sticking.
+Check for broken spring.
SEF097K
OK or NG
OK©GO TO 8.
NG©Replace IACV-FICD solenoid valve.
8 CHECK AMBIENT AIR TEMPERATURE SWITCH
Refer to AC section, ªTROUBLE DIAGNOSISº.
OK or NG
OK©GO TO 9.
NG©Replace ambient air temperature switch.
9 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3123.
©INSPECTION END
IACV-FICD SOLENOID VALVEKA24DE (EURO OBD)
Diagnostic Procedure
EC-3395