CHASSIS ELECTRICAL – Combination Meters
54-28
FUEL GAUGE SIMPLE CHECK
Remove the fuel gauge unit connector.
Use the special tool to connect a test
lamp (12 V – 3.4 W) to the harness
connector. (Refer to Fig.1)
When the ignition switch is turned to
ON, the test lamp illuminates.
OK
The needle of the fuel gauge moves.
OK
Replace the fuel gauge unit.
NG
Replace the fuel gauge.
NG
Repair the harness.
FUEL GAUGE UNIT CHECK
Remove the fuel gauge unit from the fuel tank.
FUEL GAUGE UNIT RESISTANCE
1. Check that resistance value between the fuel gauge unit
terminal and earth terminal is at standard value when
fuel gauge unit float is at point F and point E.
Standard value:
Float position Main Sub
Point F 1.8 ± 1.2 Ω 1.2 ± 0.8 Ω
Point E 65.2 ± 4 Ω 44.8 ± 8 Ω
2. Check that resistance value changes smoothly when float
moves slowly between point F and point E.
Test lamp
(12V–3.4W)
Earth
Fuel gauge
MB991219
Fig: 1
Earth
Fuel gauge
Fuel gauge unit
Earth
Earth
Fuel gauge unit
Main fuel gauge unit Sub fuel gauge unit
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