C2.1 Main Instrument 2

To check

Check whether the tone comes from the main instrument display's PWM control of instrument lighting, as follows:

1. Set the instrument lighting rheostat to max.

2. Shine a flash light on the SID unit's photodiode. The tone should increase in intensity.

3. Cover the photodiode and the tone should stop.

Procedure

The fault can be rectified by changing the processor card in the main instrument 2 and substituting an interference-suppressed card, part number 47 11 214 (CA=30564136).

This card can be used after the following chassis numbers (inclusive):

- miles/turbo R2011902

- miles/inj R2015393

- km/turbo R2018927

- km/inj R2015980

See group 3 "Main instrument 2" for repair instructions.