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P1637 Diagnostic Trouble Code Discussion for February 2010

Generator 'L' Terminal Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1637
Help Request Posted
2001 Chevrolet Express 3500 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GBHG31R61
P1637: Generator 'L' Terminal Circuit Malfunction. ... P0335, P1637, P1638. I scoped the CKP signal wire at the PCM. Had a square wave signal. Checked power and ground at CKP sensor. Checked out ok. Perform voltage drop test between PCM and CKP...
February 10, 2010
2001 Chevrolet Express 3500 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GBHG31R61
P1637: Generator 'L' Terminal Circuit Malfunction. ... P0335, P1637, P1638. I scoped the CKP signal wire at the PCM. Had a square wave signal. Checked power and ground at CKP sensor. Checked out ok. Perform voltage drop test between PCM and CKP...
February 10, 2010