1998 ISUZU TROOPER Service Repair Manual

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Page 3041 of 3573

ISUZU TROOPER 1998 Service Repair Manual 8DÐ448 WIRING SYSTEM 2-2. Tachometer Needle Fluctuates (May Be Wide Fluctuation) ·IS THE PULSE INPUT NORMAL? YES THE WAVEFORM BY OSCILLOSCOPE IS DEFORMED (ABNORMAL INPUT) NO REPLACE THE METER ASSEM

Page 3042 of 3573

ISUZU TROOPER 1998 Service Repair Manual WIRING SYSTEM 8DÐ449 I-9 Inspection of a waveform by oscilloscope 1. Check the waveform of the meter assembly connector 9 I-9 (Tachometer pulse). Normal waveform OV 6.7m sec. MIN. 0.4VMAX. 4.3V

Page 3043 of 3573

ISUZU TROOPER 1998 Service Repair Manual 8DÐ450 WIRING SYSTEM 3. Voltmeter 3-1. Voltmeter Needle Does Not Move 3-2. Voltage Reading Is Too Low (Or High) ·IS THE METER ASSEMBLY CONNECTOR I-9 SECURELY CONNECTED? YES · · ·DISCONNECT

Page 3044 of 3573

ISUZU TROOPER 1998 Service Repair Manual WIRING SYSTEM 8DÐ451 4. Engine Coolant Temperature (ECT) Gauge 4-1 Gauge Needle Does Not Move ·IS THE CONNECTOR OF THE ENGINE COOLANT TEMPERATURE UNIT CONNECTED SECURELY? YES · · ·DISCONNECT TH

Page 3045 of 3573

ISUZU TROOPER 1998 Service Repair Manual 8DÐ452 WIRING SYSTEM 4-2 Gauge Reading Is Too Low (Or High) ·DOES THE THERMOSTAT OPERATE NORMALLY? YES · ·TURN THE STARTER SWITCH ON WHEN INSERTING AND PULLING OUT THE ENGINE COOLANT TEMPERATURE

Page 3046 of 3573

ISUZU TROOPER 1998 Service Repair Manual WIRING SYSTEM 8DÐ453 4-3 Needle Overshoots (Goes Up To The ÒHÓ Range) · ·DISCONNECT THE CONNECTOR OF THE ENGINE COOLANT TEMPERATURE UNIT WHEN THE STARTER SW IS TURNED ON, DOES THE POINTER REACH

Page 3047 of 3573

ISUZU TROOPER 1998 Service Repair Manual 8DÐ454 WIRING SYSTEM 5. Oil Pressure Gauge 5-1 Needle Does Not Move · ·DISCONNECT THE CONNECTOR OF THE OIL PRESSURE UNIT WHEN THE STARTER SW IS TURNED ON, DOES THE NEEDLE REMAIN STILL? YES ·IS T

Page 3048 of 3573

ISUZU TROOPER 1998 Service Repair Manual WIRING SYSTEM 8DÐ455 5-2 Oil Pressure Gauge Reading Is Too Low (Or High) ·(WHEN THE OIL PRESSURE IS MEASURED WITH THE MASTER METER) DOES THE OIL PRESSURE GAUGE SHOWS THE CORRECT READING? YES ·WHEN
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