No Response From PCM (PCM SCI Only) - NGC

Test 1 - 2:

Test 3 - 6:

Test 7 - 10:

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

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