NISSAN ALMERA TINO 2001 Service Repair Manual

MODELS WITH ECM IN CABINNLEC0434S02
YEC901
INJECTORQG18DE
Wiring Diagram (Cont'd)
EC-496

Diagnostic ProcedureNLEC0438
1 CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform ªPOWER BALANCEº in ªACTIVE TESTº mode with CONSULT-II.
SEF190Y
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound.
MEC703B
Clicking noise should be heard.
OK or NG
OK©INSPECTION END
NG©GO TO 2.
INJECTORQG18DE
Diagnostic Procedure
EC-497

2 CHECK POWER SUPPLY
1. Stop engine.
2. Disconnect injector harness connector.
3. Turn ignition switch ªONº.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester.
SEF949X
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
+10A fuse
+Harness connectors F38, M50 (where fitted)
+Harness connectors F44, M72 (where fitted)
+Harness for open or short between injector and fuse
©Repair harness or connectors.
4 CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector harness connector terminal 2 and ECM terminals 101, 103, 105, 107.
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 harness for open or short between ECM and injector.
©Repair open circuit or short to ground or short to power in harness or connectors.
6 CHECK INJECTOR
Refer to ªComponent Inspectionº, EC-499.
OK or NG
OK©GO TO 7.
NG©Replace injector.
INJECTORQG18DE
Diagnostic Procedure (Cont'd)
EC-498

7 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-145.
©INSPECTION END
SEF807Z
Component InspectionNLEC0439INJECTORNLEC0439S011. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
Resistance: 13.5 - 17.5W[at 25ÉC (77ÉF)]
If NG, replace injector.
INJECTORQG18DE
Diagnostic Procedure (Cont'd)
EC-499

Component DescriptionNLEC0542IGNITION COIL AND POWER TRANSISTORNLEC0542S01The ignition signal from the ECM is sent to and amplified by the
power transistor. The power transistor turns on and off the ignition
coil primary circuit. This on-off operation induces the proper high
voltage in the coil secondary circuit.
CONSULT-II Reference Value in Data Monitor
Mode
NLEC0543Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
IGNITION SW+Ignition switch: ON®OFF®ON ON®OFF®ON
ECM Terminals and Reference ValueNLEC0544Specification 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)
35
36
37
38L/W
PU
L/R
GY/RIgnition signal (No. 1)
Ignition signal (No. 2)
Ignition signal (No. 3)
Ignition signal (No. 4)[Engine is running]
+Warm-up condition
+Idle speed0 - 0.2V
SEF971W
[Engine is running]
+Engine speed is 2,000 rpm0.2 - 0.4V
SEF972W
IGNITION SIGNALQG18DE
Component Description
EC-500

Wiring DiagramNLEC0545MODELS WITH ECM IN ENGINE COMPARTMENTNLEC0545S01
YEC673
IGNITION SIGNALQG18DE
Wiring Diagram
EC-501

YEC674
IGNITION SIGNALQG18DE
Wiring Diagram (Cont'd)
EC-502

MODELS WITH ECM IN CABINNLEC0545S02
YEC902
IGNITION SIGNALQG18DE
Wiring Diagram (Cont'd)
EC-503

YEC674
IGNITION SIGNALQG18DE
Wiring Diagram (Cont'd)
EC-504

Diagnostic ProcedureNLEC0579
1 CHECK ENGINE 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 12.
No©GO TO 3.
2 SEARCH FOR MALFUNCTIONING CIRCUIT
With CONSULT-II
1. Perform ªPOWER BALANCEº in ªACTIVE TESTº mode with CONSULT-II.
2. Search for circuit which does not produce a momentary engine speed drop.
SEF190Y
©GO TO 12.
3 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ON.
2. Check voltage between ECM terminals 110, 112 and ground with CONSULT-II or tester.
SEF366X
OK or NG
OK©GO TO 4.
NG©GO TO TROUBLE DIAGNOSIS FOR POWER SUPPLY, EC-146.
IGNITION SIGNALQG18DE
Diagnostic Procedure
EC-505