Tuesday, October 31, 2006

Intermittent NO start and no scanner communication for 2002 Chevy Blazer 4.3L with no engine codes


What can cause my scanner not to communicate with my engine computer during no start. When this intermittent no start happens, the shift PRNDL indicator will also quit together with the dash lights. As per your blog, we changed the bcm module but the problem remains.

ATS Adviser:

That bcm will not apply here because the symptoms are entirely different,your symptoms: no start + no scanner communication + no PRNDL signal means a defective ignition switch. During no start, go to your steering column and check the yellow wire at the ignition switch below the steering wheel. If there is no power (12 volts) at the wire, the ignition switch is defective.

ATS Tips:

The ignition switch can be replaced without removing the steering wheel. Use ATS wiring diagram as a guide when locating components.


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