22 · Diagnostics

Gearbox trim led does not light up

Fault diagnosisGearbox trim led does not light up

GEARBOX TRIM LED DOES NOT LIGHT UP

Automatic Transmission

When the ignition is turned on, the ideograms on the gearbox trim do not light up.

STEP	TEST RESULTS
1	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Move on to Step		(Wiring Diagram ) E7050 AUTOMATIC TRANSMISSION
			(Wiring Diagram ) E7050 AUTOMATIC TRANSMISSION
			(Wiring Diagram ) E7050 AUTOMATIC TRANSMISSION
		2		ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Move on to Step
3	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Move on to Step
4	ALL OK	PROBLEMS ENCOUNTERED	ACTION

When the ignition is turned on, the ideograms on the gearbox trim do not light up.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
1	CHECK ELECTRICAL CIRCUIT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check: Gearbox trim power supply Protective fuse in dashboard junction unit Correct connections between dashboard junction unit and trim Gearbox Correct connections between gearbox trim and earth Earth (Wiring Diagram ) E7050 AUTOMATIC TRANSMISSION	Move on to Step	1. Power supply not correct	1. Restore correct supply (Wiring Diagram ) E7050 AUTOMATIC TRANSMISSION
			2. Connections not correct	2. Restore the correct connections (Wiring Diagram ) E7050 AUTOMATIC TRANSMISSION
			3. Fuse blown	3. Change the fuse (find out what caused it to blow)
			4. Earth defective	4. Repair the earth contact: (Wiring Diagram ) E7050 AUTOMATIC TRANSMISSION
2	GEARBOX TRIM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the condition of the gearbox trim	Move on to Step	Gearbox trim defective	Replace the gearbox trim
3	LIGHTING CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check: The condition of the backlight LEDs (Wiring Diagram ) E7050 AUTOMATIC TRANSMISSION	Move on to Step	LEDs defective	Replace the LEDs
4	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present

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