Page 1449 of 3051
Diagnostic ProcedureNLEC1859
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.
INJECTORSR20DE
Diagnostic Procedure
EC-1024
Page 1450 of 3051

2 CHECK POWER SUPPLY
1. Stop engine.
2. Disconnect injector harness connector.
3. Turn ignition switch ªONº.
4. Check voltage between terminal 2 and ground with CONSULT-II or tester.
SEF986W
Voltage: Battery voltage
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 M72, F44 (where fitted)
+Harness connectors F13, F60
+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 1 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 following.
+Harness connectors F60, F13
+Harness for open or short between ECM and injector.
©Repair open circuit or short to ground or short to power in harness or connectors.
INJECTORSR20DE
Diagnostic Procedure (Cont'd)
EC-1025
Page 1451 of 3051
6 CHECK INJECTOR
Refer to ªComponent Inspectionº, EC-1026.
OK or NG
OK©GO TO 7.
NG©Replace injector.
7 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-670.
©INSPECTION END
SEF612Y
Component InspectionNLEC1860INJECTORNLEC1860S011. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
Resistance: 13.1 - 16.0W[at 25ÉC (77ÉF)]
If NG, replace injector.
INJECTORSR20DE
Diagnostic Procedure (Cont'd)
EC-1026
Page 1452 of 3051
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1861Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
START SIGNAL+Ignition switch: ON®START®ON OFF®ON®OFF
ECM Terminals and Reference ValueNLEC1862Specification 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)
41 B/Y Start signal[Ignition switch ªONº]Approximately 0V
[Ignition switch ªSTARTº]9 - 12V
START SIGNALSR20DE
CONSULT-II Reference Value in Data Monitor Mode
EC-1027
Page 1453 of 3051
Wiring DiagramNLEC1863MODELS WITH ECM IN ENGINE COMPARTMENTNLEC1863S01
YEC713
START SIGNALSR20DE
Wiring Diagram
EC-1028
Page 1454 of 3051
MODELS WITH ECM IN CABINNLEC1863S02
YEC941
START SIGNALSR20DE
Wiring Diagram (Cont'd)
EC-1029
Page 1455 of 3051
Diagnostic Procedure=NLEC1864
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. Turn ignition switch ªONº.
2. Check ªSTART SIGNALº in ªDATA MONITORº mode with CONSULT-II under the following conditions.
SEF227Y
OK or NG
OK©INSPECTION END
NG©GO TO 4.
3 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Turn ignition switch to ªSTARTº.
2. Check voltage between ECM terminal 41 and ground under the following conditions.
SEF613Y
OK or NG
OK©INSPECTION END
NG©GO TO 4.
START SIGNALSR20DE
Diagnostic Procedure
EC-1030
Page 1456 of 3051
4 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M49, F43 (where fitted)
+Harness connectors M71, F45 (where fitted)
+10A fuse
+Harness for open or short between ECM and ignition switch
OK or NG
OK©GO TO 5.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
5 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-670.
©INSPECTION END
START SIGNALSR20DE
Diagnostic Procedure (Cont'd)
EC-1031