Operation CHARM: Car repair manuals for everyone.
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

Z41



- Continue to monitor the PIDs listed in the previous step.

- Key On, Engine Running.

- Scan Tool connected.

- Warm engine to operating temperature (approximately 195°F).

- Continue to view the PIDs based on the information from the pinpoint test or from the Intermittent Symptom Charts. Intermittent Symptom Charts

- Compare the actual values from the vehicle to the HOT IDLE values in the Diagnostic Reference Value Chart. Normal Scan Data Values - Includes Pids

- Are any PID values out of range or suddenly drop out and back into range?

Yes -- Fault identified. For Input fault: GO to Z10. Z10

For output fault: GO to Z20. Z20

No -- Unable to verify fault. GO to Z42. Z42