CHASSIS ELECTRICAL ± Combination Meters
Fig. 1
Connector
Earth
Test lamp (12V±3.4W)
54A-22
Inspection Procedure 5
Engine coolant temperature gauge does not operate.
Probable cause
If speedometer and tachometer operate normally, the harness from power supply
to combination meter is normal.
D Malfunction of engine coolant temperature gauge unit
D Malfunction of engine coolant temperature gauge
D Malfunction of harness or connector
Replace the engine coolant temperature gauge.
OK
Replace the engine coolant temperature gauge unit.
(2) NG
NG
Check the harness between the combination meter and engine
coolant temperature gauge, and repair if necessary.
Repair
NG
OK
Check trouble symptom.
NO
Check the engine coolant temperature gauge circuit.
D Disconnect the engine coolant temperature gauge unit
connector A-68.
D Use the special tool to connect a test lamp (12 V ± 3.4 W)
to the harness-side connector. (Refer to Fig. 1.)
D Ignition switch: ON
(1) Test lamp condition
OK: Illuminates
(2) Engine coolant temperature gauge needle condition
OK: Moves to the middle position.
(1) NG
Check the following connectors: A-68, C-29, C-06
Do the speedometer and tachometer operate normally?
YES
Check the speedometer and tachometer circuit. (Refer to
P.54A-19.)
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