NISSAN ALMERA 2001 Service Manual

9 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-177.
©INSPECTION END
REFRIGERANT PRESSURE SENSORQG
Diagnostic Procedure (Cont'd)
EC-577

CONSULT-II Reference Value in Data Monitor
Mode
NJEC0548Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
LOAD SIGNAL+Ignition switch: ONRear window defogger is operating
and/or lighting switch is on.ON
Rear window defogger is not oper-
ating and lighting switch is not on.OFF
HEATER FAN SW+Ignition switch: ONHeater fan motor is operating. ON
Heater fan motor is not operating. OFF
ECM Terminals and Reference ValueNJEC0549Specification 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.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
50 L/BElectric load signal
(Load switch)[Engine is running]
+Rear window defogger is operating and/or lighting
switch is onBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+Rear window defogger is not operating and lighting
switch is not onApproximately 0V
51 LG/B Heater fan motor switch[Engine is running]
+Heater fan motor is operatingApproximately 0V
[Engine is running]
+Heater fan motor is not operatingApproximately 5V
ELECTRICAL LOAD SIGNALQG
CONSULT-II Reference Value in Data Monitor Mode
EC-578

Wiring DiagramNJEC0550SEDANNJEC0550S01
HEC892
ELECTRICAL LOAD SIGNALQG
Wiring Diagram
EC-579

HEC893
ELECTRICAL LOAD SIGNALQG
Wiring Diagram (Cont'd)
EC-580

HATCHBACKNJEC0550S03Type-1NJEC0550S0301
HEC819
ELECTRICAL LOAD SIGNALQG
Wiring Diagram (Cont'd)
EC-581

Type-2NJEC0550S0302
HEC966
ELECTRICAL LOAD SIGNALQG
Wiring Diagram (Cont'd)
EC-582

Diagnostic Procedure Ð Load Signal ÐNJEC0584
1 INSPECTION START
Do you have CONSULT-II?
YesorNo
Ye s©GO TO 2.
No©GO TO 4.
2 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
With CONSULT-II
1. Turn ignition switch ªONº.
2. Check ªLOAD SIGNALº in ªDATA MONITORº mode with CONSULT-II under the following conditions.
SEF954X
OK or NG
OK©GO TO 3.
NG©GO TO 6.
3 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
With CONSULT-II
1. Turn ignition switch ªONº.
2. Check ªLOAD SIGNALº in ªDATA MONITORº mode with CONSULT-II under the following conditions.
SEF955X
OK or NG
OK©INSPECTION END
NG©GO TO 14.
ELECTRICAL LOAD SIGNALQG
Diagnostic Procedure Ð Load Signal Ð
EC-583

4 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Check voltage between ECM terminal 50 and ground under the following conditions.
SEF956X
OK or NG
OK©GO TO 5.
NG©GO TO 6.
5 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Check voltage between ECM terminal 50 and ground under the following conditions.
SEF957X
OK or NG
OK©INSPECTION END
NG©GO TO 15.
6 CHECK REAR WINDOW DEFOGGER FUNCTION
1. Start engine.
2. Turn ªONº the rear window defogger switch.
3. Check the rear windshield. Is the rear windshield heated up?
YesorNo
Yes (Sedan)©GO TO 7.
Yes (Hatchback)©GO TO 12.
No©Refer to EL-240, ªRear Window Defoggerº.
ELECTRICAL LOAD SIGNALQG
Diagnostic Procedure Ð Load Signal Ð (Cont'd)
EC-584

7 CHECK POWER SUPPLY
1. Stop engine.
2. Turn ªOFFº the rear window defogger switch.
3. Disconnect rear window defogger relay.
4. Check voltage between terminal 3 (LHD models), 5 (RHD models) and ground with CONSULT-II or tester.
SEF626Z
OK or NG
OK©GO TO 8.
NG©Check the following and repair.
+20A fuse
+Harness for open and short between fuse block and rear window defogger relay
8 CHECK REAR WINDOW DEFOGGER RELAY
Refer to ªComponent Inspectionº, EC-590.
OK or NG
OK©GO TO 9.
NG©Replace rear window defogger relay.
9 CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 50 and rear window defogger relay terminals 5 (LHD models), 3 (RHD
models).
Refer to wiring diagram.
SEF627Z
3. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 11.
NG©GO TO 10.
ELECTRICAL LOAD SIGNALQG
Diagnostic Procedure Ð Load Signal Ð (Cont'd)
EC-585

10 DETEC TMALFUNCTIONIN GPART
11 CHEC KINTERMITTEN TINCIDENT
12 CHEC KREA RWINDO WDEFOGGE RINPU TSIGNA LCIRCUIT
13 DETEC TMALFUNCTIONIN GPART
14 CHEC KHEADLAM PFUNCTION
15 CHEC KHEADLAM PFUNCTION
Diagnostic Procedure Ð Load Signal Ð (Cont'd)