Isuzu Trooper (1998-2002 year). Service manual — part 981
8D–458
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 THERE A SHORT CIRCUIT BETWEEN THE OIL
PRESSURE UNIT AND THE OIL PRESSURE GAUGE?
YES
REPLACE THE OIL PRESSURE UNIT
NO
NO
REPLACE THE METER ASSEMBLY
REPAIR THE SHORT CIRCUIT
WIRING SYSTEM
8D–459
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 INSERTING AND PULLING OUT THE OIL
PRESSURE UNIT CONNECTOR E-2 OR E-12
SEVERAL TIMES, DOES THE INDICATION OF THE OIL
PRESSURE GAUGE CHANGE?
YES
CHECK FOR POSSIBLE ENGINE PROBLEM
(REFER TO ENGINE SECTION)
NO
REPAIR A POOR CONNECTION AT THE CONNECTOR
OF THE OIL PRESSURE UNIT
NO
•
IS THE OIL PRESSURE UNIT NORMAL?
YES
REPLACE THE OIL
PRESSURE UNIT
NO
REPLACE THE METER
ASSEMBLY
8D–460
WIRING SYSTEM
5-3 Needle Overshoots (Goes Up To 15 (x100 kPa))
• IS THE CONNECTOR OF THE OIL PRESSURE UNIT E-2
OR E-12 CONNECTED SECURELY?
YES
• IS THE OIL PRESSURE UNIT NORMAL?
YES
YES
NO
NO
NO
• IS THERE AN OPEN CIRCUIT IN THE CIRCUIT
BETWEEN THE OIL PRESSURE UNIT AND THE
OIL PRESSURE GAUGE?
RECONNECT THE CONNECTOR
REPLACE THE OIL PRESSURE UNIT
REPLACE THE METER ASSEMBLY
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT IN THE CIRCUIT
WIRING SYSTEM
8D–461
6. Fuel Gauge
6-1 Fuel Gauge Needle Does Not Move
•
IS THE CONNECTOR OF THE FUEL TANK UNIT F-5
CONNECTED SECURELY?
YES
•
•
•
DISCONNECT THE CONNECTOR OF THE FUEL TANK UNIT
CONNECT A 3.4W BULB BETWEEN THE HARNESS SIDE
CONNECTOR 2 F-5 AND THE GROUND OF THE FUEL TANK
UNIT
WHEN THE STARTER SW IS TURNED ON, DOES THE FUEL
GAUGE NEEDLE FLUCTUATE AFTER ABOUT 90 SECONDS?
YES
RECONNECT THE CONNECTOR
NO
NO
•
IS THERE CONTINUTY BETWEEN THE FUEL TANK UNIT
CONNECTOR TERMINALS 2 F-5 AND 1 F-5 ?
•
IS THE CIRCUIT BETWEEN THE FUEL GAUGE AND THE FUEL
TANK UNIT NORMAL?
YES
NO
REPLACE THE FUEL TANK
UNIT
YES
REPLACE THE METER
ASSEMBLY
NO
REPAIR A POOR CONNECTION
AT THE CONNECTORS OR AN
OPEN CIRCUIT IN THE CIRCUIT
REPAIR A POOR
CONNECTION AT THE
CONNECTORS OR AN OPEN
CIRCUIT BETWEEN THE
FUEL TANK UNIT AND THE
GAUGE
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