2001 NISSAN PICK-UP Repair Manual

4 ADJUST IGNITION TIMING
With CONSULT-II
1. Adjust ignition timing to the specified value by turning distributor after loosening bolts which secure distributor.
Without CONSULT-II
1. Adjust ignition timing to the specified value by turning distributor after loosening bolts which secure distributor.
2. Turn off engine and connect throttle position sensor harness connector to throttle position sensor.
SEF265S
Models with CONSULT-II©GO TO 2.
Models without CON-
SULT-II©GO TO 3.
5 CHECK BASE IDLE SPEED
With CONSULT-II
1. Read idle speed in ªIGNITION TIMING ADJº in ªWORK SUPPORTº mode.
SEF713Z
M/T: 650±50 rpm
Without CONSULT-II
1. Check idle speed.
M/T: 650±50 rpm
OK or NG
OK (With CONSULT-II)©GO TO 7.
OK (Without CONSULT-
II)©GO TO 8.
NG©GO TO 6.
BASIC SERVICE PROCEDUREKA24DE (EURO OBD)
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment
EC-3040

6 ADJUST BASE IDLE SPEED
1. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed.
2. Adjust idle speed by turning idle speed adjusting screw.
SEF240SA
M/T: 650±50 rpm
Models with CONSULT-II©GO TO 7.
Models without CON-
SULT-II©GO TO 8.
7 CHECK TARGET IDLE SPEED
With CONSULT-II
1. Touch ªBACKº on CONSULT-II.
2. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed.
SEF602K
3. Read idle speed in ªDATA MONITORº mode with CONSULT-II.
SEF058Y
M/T: 700±50 rpm
OK or NG
OK©GO TO 10.
NG©GO TO 9.
BASIC SERVICE PROCEDUREKA24DE (EURO OBD)
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment
EC-3041

8 CHECK TARGET IDLE SPEED
Without CONSULT-II
1. Turn off engine and connect throttle position sensor harness connector.
SEF265S
2. Start engine.
3. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed.
4. Check target idle speed.
M/T: 700±50 rpm
OK or NG
OK©GO TO 10.
NG©GO TO 9.
9 DETECT MALFUNCTIONING PART
Check the following.
1. Check IACV-AAC valve and replace if necessary. Refer to EC-3295.
2. Check IACV-AAC valve harness and repair if necessary. Refer to EC-3295.
3. Check ECM function by substituting another known-good ECM.
(ECM may be the cause of a problem, but this is rarely the case.)
©GO TO 10.
BASIC SERVICE PROCEDUREKA24DE (EURO OBD)
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment
EC-3042

10 CHECK HEATED OXYGEN SENSOR 1 SIGNAL
With CONSULT-II
1. See ªHO2S1 MNTR (B1)º in ªDATA MONITORº mode.
2. Run engine at about 2,000 rpm for about 2 minutes under no-load.
3. Maintain engine at 2,000 rpm under no-load (engine is warmed up to normal operating temperature) and check that the
monitor fluctuates between ªLEANº and ªRICHº more than five times during 10 seconds.
SEF820Y
1 cycle: RICH®LEAN®RICH
2 cycles: RICH®LEAN®RICH®LEAN®RICH
Without CONSULT-II
1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Set voltmeter probe between ECM terminal 50 and ground.
3. Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 - 1.0V more than 5 times during 10 seconds at 2,000
rpm.
1 time: 0 - 0.3V®0.6 - 1.0V®0 - 0.3V
2 times: 0 - 0.3V®0.6 - 1.0V®0 - 0.3V®0.6 - 1.0V®0 - 0.3V
OK or NG
OK©INSPECTION END
NG©GO TO 11.
BASIC SERVICE PROCEDUREKA24DE (EURO OBD)
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment
EC-3043

11 CHECK HEATED OXYGEN SENSOR 1 HARNESS
1. Turn off engine and disconnect battery ground cable.
2. Disconnect ECM harness connector.
3. Disconnect heated oxygen sensor 1 harness connector.
4. Then connect harness connector terminal for heated oxygen sensor 1 to ground with a jumper wire.
SEC299D
5. Check for continuity between terminal 50 of ECM harness connector and body ground.
SEF250P
Continuity exists...OK
Continuity does not exist...NG
OK or NG
OK©1. Connect ECM harness connector to ECM.
2. Connect battery ground cable.
3. GO TO 13.
NG©1. Repair or replace harness.
2. GO TO 12.
BASIC SERVICE PROCEDUREKA24DE (EURO OBD)
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment
EC-3044

12 PREPARATION FOR IDLE SPEED ADJUSTING
With CONSULT-II
1. Select ªIGNITION TIMING ADJº in ªWORK SUPPORTº mode.
2. Touch ªSTARTº.
PEF546N
Without CONSULT-II
1. Stop engine and disconnect throttle position sensor harness connector.
SEF265S
2. Start engine.
©GO TO 6.
BASIC SERVICE PROCEDUREKA24DE (EURO OBD)
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment
EC-3045

13 PREPARATION FOR ªCOº % CHECK
With CONSULT-II
1. Select ªENGINE COOLANT TEMPº in ªACTIVE TESTº mode.
2. Set ªCOOLANT TEMPº to 5ÉC (41ÉF) by touching ªQuº and ªQdº and ªUPº, ªDOWNº.
SEF172Y
1. Connect ECM harness connector to ECM.
2. Disconnect engine coolant temperature sensor harness connector.
3. Connect a resistor (4.4 kW) between terminals of engine coolant temperature sensor harness connector.
SEF053RA
4. Connect battery ground cable.
©GO TO 14.
BASIC SERVICE PROCEDUREKA24DE (EURO OBD)
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment
EC-3046

14 CHECK ªCOº %
Without CONSULT-II
1. Start engine and warm it up until engine coolant temperature indicator points to middle of gauge.
(Be sure to start engine after setting ªCOOLANT TEMPº or installing a 4.4 kWresistor.)
SEF810K
2. Rev engine two or three times under no-load, then run engine at idle speed.
SEF978U
3. Check ªCOº %.
Idle CO: 2.9 - 10.8% and engine runs smoothly.
4.
With CONSULT-II
After checking CO%, touch ªBACKº.
5.
Without CONSULT-II
After checking CO%,
a. Disconnect the resistor from terminals of engine coolant temperature sensor harness connector.
b. Connect engine coolant temperature sensor harness connector to engine coolant temperature sensor.
OK or NG
OK©GO TO 15.
NG©GO TO 16.
BASIC SERVICE PROCEDUREKA24DE (EURO OBD)
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment
EC-3047