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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A/C Heater Control Illumination Inoperative - MTC

Test 1 - 3:




Test 4:






SYMPTOM
A/C HEATER CONTROL ILLUMINATION INOPERATIVE - MTC

POSSIBLE CAUSES
- Active HVAC DTC(s) present
- Instrument cluster (EMIC) DTC(s) present
- A/C heater control
- Panel lamps driver circuit open
- Instrument cluster (EMIC)