Inspection Procedure 11

INSPECTION PROCEDURE 11: The Fuel Warning Light does not Illuminate or go out

CIRCUIT OPERATION
The fuel warning light illuminates when the fuel gauge of the combination meter indicates a predetermined value or lower.

TECHNICAL DESCRIPTION (COMMENT)
If only the fuel warning light does not operate, the fuel pump module, the fuel level sensor (sub), the combination meter, wiring harness or connector(s) may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the fuel level sensor (sub)
- Malfunction of the fuel pump module
- Malfunction of the combination meter
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector.

DIAGNOSIS

Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A

Using scan tool MB991958, check actuator test.







CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Set scan tool MB991958 to the actuator test mode.

- Item 20: Indicator lamp 1: ON
- The fuel warning light illuminates.

- Item 21: Indicator lamp 1: OFF
- The fuel warning light goes out.

4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the check result normal?

YES : Carry out Inspection Procedure 9, "Fuel Gauge does not work (other meters work)" (Refer to Inspection Procedure 9).

NO : Replace the combination meter.