Pinpoint Test AF: U3000:41, U3000:49
- DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition HVAC U3000:41 Control Module: General Checksum Failure Sets when the HVAC control module detects an internal fault. HVAC U3000:49 Control Module: Internal Electronic Failure Sets when the HVAC control module detects an internal fault. Possible Sources
- Suspect module
- AF1 INSTALL A NEW SUSPECT MODULE
- Ignition OFF.
- INSTALL a new HVAC control module. REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module .
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS and follow the instructions for the applicable TSB, GSB, SSM or FSA. No The repair is complete.