2001 NISSAN PICK-UP Repair Manual

3 CHECK INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 22 and terminal 1.
SEF219V
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 5.
NG©GO TO 4.
4 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M5, E101
+Harness connectors E33, E205
+Harness for open or short between ECM and PNP switch
©Repair open circuit or short to ground or short to power in harness or connectors.
5 CHECK PNP SWITCH
Refer to MT section.
OK or NG
OK©GO TO 6.
NG©Replace PNP switch.
6 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3123.
©INSPECTION END
DTC P1706 PNP SWITCHKA24DE (EURO OBD)
Diagnostic Procedure
EC-3360

SEF928V
Component DescriptionNEEC0319IGNITION COIL & POWER TRANSISTORNEEC0319S01The ignition signal from the ECM is sent to the power transistor.
The power transistor switches the ignition coil primary circuit on
and off. As the primary circuit is turned on and off, the proper high
voltage is induced in the coil secondary circuit.
The distributor is not repairable and must be replaced as an
assembly except distributor cap and rotor head.
NOTE:
The rotor screw which secures the distributor rotor head to the
distributor shaft must be tightened properly.
: 3.3 - 3.9 N´m (0.34 - 0.40 kg-m, 29.5 - 34.7 in-lb)
CONSULT-II Reference Value in Data Monitor
Mode
NEEC0320
MONITOR ITEM CONDITION SPECIFICATION
IGN TIMING+Engine: After warming up
+Air conditioner switch: OFF
+Shift lever: ªNº
+No-loadIdle Approx. 15É BTDC
2,000 rpm More than 30É BTDC
IGNITION SIGNALKA24DE (EURO OBD)
Component Description
EC-3361

ECM Terminals and Reference Value=NEEC0321Specification 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)
1 W/PU Ignition signal[Engine is running]
+Warm-up condition
+Idle speed0 - 0.5V
SEF996V
[Engine is running]
+Engine speed is 2,000 rpm0.2 - 1.0V
SEF997V
IGNITION SIGNALKA24DE (EURO OBD)
ECM Terminals and Reference Value
EC-3362

Wiring DiagramNEEC0324
GEC240A
IGNITION SIGNALKA24DE (EURO OBD)
Wiring Diagram
EC-3363

GEC241A
IGNITION SIGNALKA24DE (EURO OBD)
Wiring Diagram
EC-3364

Diagnostic ProcedureNEEC0325
1 INSPECTION START
Turn ignition switch ªOFFº, and restart engine.
Is engine running?
YesorNo
Yes (With CONSULT-II)©GO TO 2.
Yes (Without CONSULT-
II)©GO TO 3.
No©GO TO 4.
2 CHECK OVERALL FUNCTION
With CONSULT-II
1. Perform ªPOWER BALANCEº in ªACTIVE TESTº mode with CONSULT-II.
2. Make sure that all circuits do not produce a momentary engine speed drop.
SEF981Z
OK or NG
OK©INSPECTION END
NG©GO TO 7.
3 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Let engine idle.
2. Read the voltage signal between ECM terminal 1 and ground with an oscilloscope.
3. Verify that the oscilloscope screen shows the signal wave as shown below.
SEF984Z
OK or NG
OK©INSPECTION END
NG©GO TO 7.
IGNITION SIGNALKA24DE (EURO OBD)
Diagnostic Procedure
EC-3365

4 CHECK POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect ignition coil harness connector.
SEC276D
3. Turn ignition switch ON.
4. Check voltage between terminal 7 and ground with CONSULT-II or tester.
AEC698
Voltage: Battery voltage
OK or NG
OK©GO TO 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E101, M5
+Harness for open or short between ignition coil and ECM relay
+Harness for open or short between ECM relay and fuse
©Repair harness or connectors.
6 CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect power transistor harness connector.
3. Check harness continuity between power transistor terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK©GO TO 7.
NG©Repair open circuit or short to power in harness or connectors.
IGNITION SIGNALKA24DE (EURO OBD)
Diagnostic Procedure
EC-3366

7 CHECK INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 1 and power transistor terminal 1.
AEC700
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 8.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
8 CHECK IGNITION COIL
1. Disconnect ignition coil harness connector.
2. Remove distributor cap.
3. Check resistance as shown in the figure.
AEC150A
MTBL0300
OK or NG
OK©GO TO 9.
NG©Replace distributor assembly as a unit.
IGNITION SIGNALKA24DE (EURO OBD)
Diagnostic Procedure
EC-3367