No Response From PCM (PCM SCI Bus)

Test 1 - 3:

Test 4 - 8:

Test 4 - 11:

SYMPTOM
NO RESPONSE FROM PCM (SCI ONLY)

POSSIBLE CAUSES
- Check PCM powers and grounds
- Controller antilock brake
- SCI transmit circuit shorted to voltage
- Transmission control module
- 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