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)

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Misfire Monitor Repair Verification Drive Cycle

1. Check the fuel gauge and the FLI PID. The Misfire Monitor can only be tested if the fuel gauge reads above one quarter full or the FLI PID is above 15% (percentage fuel tank fill).
2. Start the engine and drive the vehicle to a location where speeds can reach 88 to 97 kph (55 to 60 mph) and coast down to 64 kph (40 mph) without traffic interference.
3. Accelerate at wide-open throttle to allow vehicle to shift at red-line (if equipped with a tachometer). Immediately return to normal speed limits.

4. Perform the following drive procedure three consecutive times.
- Accelerate on highway to 97 kph (60 mph). Maintain speed for 30 seconds.
- Coast down with foot off the accelerator pedal from 97 kph to 64 kph (60 mph to 40 mph).

5. Rerun Continuous Memory, KOEO and KOER self- tests.