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No Response From PCM (PCM SCI Only)

Test 1 - 3:

Test 4 - 7:

Test 8 - 9:

SYMPTOM
NO RESPONSE FROM PCM (PCM SCI ONLY) - NGC

POSSIBLE CAUSES
- Check PCM powers and grounds
- PCM SCI transmit circuit shorted to voltage
- PCM SCI receive circuit shorted to voltage
- PCM SCI circuits shorted together
- PCM SCI transmit circuit shorted to ground
- PCM SCI receive circuit shorted to ground
- PCM SCI receive circuit open
- PCM SCI transmit circuit open
- Powertrain control module