Operation CHARM: Car repair manuals for everyone.
Home >> Jeep >> 2004 >> Grand Cherokee 4WD L6-4.0L VIN S >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Body Control Module >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Heating & A/C System >> A/C Operates With A/C Select Switch Off
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

A/C Operates With A/C Select Switch Off

Test 1 - 3:




Test 4 - 7:






SYMPTOM
A/C OPERATES WITH A/C SELECT SWITCH OFF (AZC & MTC W/GASOLINE ENGINE)

POSSIBLE CAUSES
- Check for PCM DTCs
- Powertrain control module
- A/C clutch
- A/C clutch relay output circuit shorted to voltage
- A/C clutch relay
- Check A/C switch signal circuit for a short to ground
- AZC module or A/C - heater control module
- Body control module
pro multis · About Operation CHARM