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Fault diagnosis, Charging indicator lamp (MIU1)

Fault diagnosis, Charging indicator lamp (MIU 1)

Fault symptoms

Charging lamp does not light up when ignition switch turned to Drive position.

Diagnostic procedure




1. Switch on the ignition and ground the D+ terminal on the generator.

If the charging lamp lights up, the fault lies with the generator. See Service Manual 3:1 "Electrical system".

If the charging lamp does not light up, there is an open circuit in the wiring to the main instrument display panel or else the bulb in the main instrument display panel is faulty.

2. Check the bulb in the main instrument display panel.

3. If the replacement bulb still fails to light up when activated, check that the new bulb is OK by fitting it in place of another bulb in the main instrument display panel that does light up. If the bulb is OK, continue with point 4.

4. Check the conductive foil on the rear of the main instrument display panel for an open circuit between the bulb's ground connection and the foil's corresponding connection to the connector.



Important

A diode is connected in series with the bulb and a resistor connected in parallel with it.



If there is an open circuit in the conductive foil or the diode, change the foil.

If the conductive foil and diode are OK, there is probably an open circuit in the wiring between the main instrument display panel and the generator.

Investigate and rectify.