No comms with any module

ANONYMOUS

2001 CHEVROLET EXPRESS
500,000 MILES

No comms with any module. No fuel no spark. Gauges not working right ignition module gets hot with key on
checked power and ground on pcm. Checked ok replaced pcm worked ok 1/2 hour and did the samething

1 Reply

JDL

EXPERT
16,351 POSTS

About all I can tell you now is to check for voltage at pin 16 of datalink connector. Pins 4 and 5 are grounds.

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No comms with any module

No comms with any module. No fuel no spark. Gauges not working right ignition module gets hot with key on checked power and ground on pcm. Checked ok replaced pcm worked ok 1/2 hour and did the samething

1 Reply

About all I can tell you now is to check for voltage at pin 16 of datalink connector. Pins 4 and 5 are grounds.

Please login or register to post a reply.

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No comms with any module. No fuel no spark. Gauges not working right ignition module gets hot with key on
checked power and ground on pcm. Checked ok replaced pcm worked ok 1/2 hour and did the samething