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

DR4 - Check PWR GND to CMP Sensor

- Key Off.

- CMP sensor disconnected.

- Measure resistance between PWR GND circuit at the CMP vehicle harness connector and battery negative post.

- Is resistance less than 5.0 ohms?

YES -- Go to DR5. DR5 - Check Continuity to PCM

NO -- SERVICE open in PWR GND circuit. Complete PCM reset to clear DTCs. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes