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

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Transmission Code








SYMPTOM
P1687 - NO COMMUNICATION WITH THE MIC

WHEN MONITORED
Continuously with engine running.

SET CONDITION
The DTC sets in approximately 25 seconds if no BUS messages are received form the MIC.

POSSIBLE CAUSES
- Other bus problems present
- Intermittent wiring and connectors
- MIC - No communication
- PCM - No communication with the MIC