Temperature Gauge: Testing and Inspection

Temperature gauge, fault tracing




^ Check if fuel gauge is also indicating incorrectly.
- If both gauges are incorrect, voltage stabilizer is probably faulty.
- If fuel gauge is correct, check temperature gauge using test resistor.




Check temperature gauge using 68 ohm resistor (P/N 999 5824-1).
^ Disconnect battery ground lead.
^ Disconnect sensor lead.
^ Connect test resistor across connector terminals.
^ Reconnect battery ground lead and switch on ignition.
- If instrument is intact, needle should indicate 3/4 full, as illustrated. (Tolerance: ± width of needle.)
- If reading is correct, sensor is faulty.
- If reading is incorrect, instrument is faulty. Replace instrument. Service and Repair
- If instrument shows no reading, check wiring.
^ Use ohmmeter to check for wiring open-circuit.
- If wiring is intact, replace instrument. Service and Repair




Check temperature gauge using 68 ohm resistor (P/N 999 5824-1).
^ Disconnect battery ground lead.
^ Disconnect sensor lead.
^ Connect test resistor across connector terminals.
^ Reconnect battery ground lead and switch on ignition.
- If instrument is intact, needle should indicate in middle of red zone. (Tolerance: ± width of needle.)
- If reading is correct, sensor is faulty.
- If reading is incorrect, instrument is faulty. Replace instrument. Service and Repair
- If instrument shows no reading, check wiring.
^ Use ohmmeter to check for wiring open-circuit.
- If wiring is intact, replace instrument. Service and Repair