CHASSIS ELECTRICAL ± Combination Meters
Fig. 1
MB991219
Earth
Fuel gauge
Test lamp
(12V±3.4W)
54A-21
Inspection Procedure 4
Fuel 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 fuel gauge unit
D Malfunction of fuel gauge
D Malfunction of harness or connector
Replace the fuel gauge.
OK
Replace the fuel gauge unit.
(2) NG
NG
Check the harness between the combination meter and fuel gauge,
and repair if necessary.
Repair
NG
OK
Check trouble symptom.
NO
Check the fuel gauge circuit.
D Disconnect the fuel gauge unit connector D-17.
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) Fuel gauge needle condition
OK: Moves to the middle position.
(1) NG
Check the following connectors: D-17, D-23, D-12, C-38 <L.H.
drive vehicles>, C-40 <R.H. drive vehicles>, C-02, C-05
Do the speedometer and tachometer operate normally?
YES
Check the speedometer and tachometer circuit. (Refer to
P.54A-18.)
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