System Revisions
Revisions to the 2003 MTC system include:
- all new version 0802 software.
- an all-new System Test called the Actuator Circuit Test. Refer to The Actuator Circuit Test under 3.9.2.4 System Diagnostics for more information.
- an updated HVAC Door Recalibration function that provides actuator span and status data to ease diagnosis of door span faults.
- updated diagnostic procedures using the actuator span status data to diagnose HVAC Door Recalibration Fault messages.
CAUTION:
Manual Temperature Control (MTC) Modules with software versions 0614 and 0700 used in 2001 and 2002 RS/RG vehicles are NOT compatible with software version 0802 used in 2003 RS/RG vehicles. Do NOT install an MTC Module with software version 0614 or 0700 in a 2003 RS/RG vehicle. Use the DRBIII® to verify which version software the MTC Module is using by selecting Body Systems, HVAC, and then selecting Module Display.