Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

No Response From PCM (PCM SCI Only)

Test 1 - 3:

Test 4 - 7:

Test 8 - 9:

Symptom:
NO RESPONSE FROM PCM (PCM SCI ONLY)

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