Check Messages

All CHECK messages and manual operations are produced by grounding the corresponding EDU input. This enables the fault to be traced to either its source, the system wiring or the EDU control module.

Fault Symptom

The CHECK messages do not light up when the ignition is switched on or go out when the engine is started and all engine checks are normal. ISAT Command Codes

Important: When the oil level is checked, the signal cannot give any indication unless the ignition has been switched off for at least five minutes.

To carry out an immediate test, fuse 17 (+30) must be removed and put back again.

Signal Levels