Isuzu Trooper (1998-2002 year). Manual — part 980
8D–454
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 THE METER ASSEMBLY CONNECTORS I-9
TURN THE STARTER SWITCH ON
IS THE BATTERY VOLTAGE APPLIED BETWEEN THE HARNESS
SIDE CONNECTORS 15 I-9 AND 19 I-9 OF THE METER
ASSEMBLY?
YES
CONNECT THE CONNECTOR SECURELY
NO
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT IN THE CIRCUIT BETWEEN THE
FUSE C-10 (10A) AND 15 I-9 OR THE
CONNECTORS 19 I-9 AND THE GROUND
NO
REPLACE THE METER ASSEMBLY
WIRING SYSTEM
8D–455
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 THE CONNECTOR OF THE ENGINE COOLANT
TEMPERATURE UNIT
CONNECT A 3.4W BULB BETWEEN THE HARNESS SIDE
CONNECTOR 1 E-19 OR 1 E-23 AND THE GROUND OF
THE ECT UNIT
WHEN THE STARTER SW IS TURNED ON, DOES THE
ECT GAUGE POINTER MOVE ABOUT 10 SECONDS
AFTER THAT?
YES
CONNECT THE CONNECTOR SECURELY
NO
NO
REPLACE THE ENGINE COOLANT
TEMPERATURE UNIT
•
IS THE CIRCUIT BETWEEN THE ECT GAUGE AND THE
ENGINE COOLANT TEMPERATURE UNIT NORMAL?
YES
REPLACE THE METER
ASSEMBLY
NO
REPAIR A POOR CONNECTION
AT THE CONNECTORS OR AN
OPEN CIRCUIT IN THE CIRCUIT
8D–456
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 UNIT CONNECTOR 1 E-19 OR
1 E-23 SEVERAL TIMES, DOES THE INDICATION OF THE
ECT GAUGE VARY?
YES
REPLACE THE THERMOSTAT
NO
REPAIR A POOR CONNECTION AT THE CONNECTOR
OF THE ENGINE COOLANT TEMPERATURE UNIT
NO
•
IS THE ENGINE COOLANT TEMPERATURE UNIT NORMAL?
YES
REPLACE THE ENGINE
COOLANT TEMPERATURE
UNIT
NO
REPLACE THE METER
ASSEMBLY
WIRING SYSTEM
8D–457
4-3 Needle Overshoots (Goes Up To The “H” Range)
•
•
DISCONNECT THE CONNECTOR OF THE ENGINE
COOLANT TEMPERATURE UNIT
WHEN THE STARTER SW IS TURNED ON, DOES THE
POINTER REACH TO THE “H” RANGE?
YES
•
IS THERE A SHORT CIRCUIT BETWEEN THE
ECT UNIT AND THE ECT GAUGE?
YES
REPLACE THE ENGINE COOLANT
TEMPERATURE UNIT
NO
REPAIR THE SHORT CIRCUIT
NO
REPLACE THE METER ASSEMBLY
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