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

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 battery positive.

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 .