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B1427

Symptom: Messages sent to the SID unit for initiating the ignition key warning and the direction indicator TICK TACK sound, etc. have been lost.

B1427

Communication with the SID unit short-circuited to Batt+



Fault symptom

Messages sent to the SID unit for initiating the ignition key warning and the direction indicator TICK TACK sound, etc. have been lost.



Diagnostic procedure


1. Connect a BOB to the ICE module and another BOB to the SID unit. Check the wiring between pin 37 of the ICE module connector and pin 8 of the SID unit's connector for shorting to Batt+.

2. Connect the ICE control module and ground pin 8 of the SID unit. Select "ACT. INSTR. FUNCT" and "SID OUTPUT" and then take a voltmeter reading across pin 37 of the ICE module connector and ground.


3. If the reading obtained is 0 V with the ignition switch "ON", the fault is probably in the SID unit which should then be changed. If the reading obtained is not 0 V, proceed to .