Chevrolet Sonic Repair Manual: HVAC System Control Module Programming and Setup
Note:
- DO NOT program a control module unless directed to by a service procedure
or a service bulletin. If the control module is not properly configured
with the correct calibration software, the control module will not control
all of the vehicle features properly.
- Ensure the programming tool is equipped with the latest software and
is securely connected to the data link connector. If there is an interruption
during programming, programming failure or control module damage may occur.
- Stable battery voltage is critical during programming. Any fluctuation,
spiking, over voltage or loss of voltage will interrupt programming. When
required install the EL-49642 SPS Programming Support Tool to maintain
system voltage. If not available, connect a fully charged 12 V jumper or
booster pack disconnected from the AC voltage supply. DO NOT connect a battery
charger.
- Turn OFF or disable systems that may put a load on the vehicles battery
such as; interior lights, exterior lights (including daytime running lights),
HVAC, radio, etc.
- During the programming procedure, follow the SPS prompts for the correct
ignition switch position.
- Clear DTCs after programming is complete. Clearing powertrain DTCs will
set the Inspection/Maintenance (I/M) system status indicators to NO.
- Reference Information
- Special Tools
EL-49642 SPS Programming Support Tool
For equivalent regional tools, refer to Special Tools.
- Replace and Program Control Module or Reprogram Control Module
-
To program a replacement or an existing control module, perform the following
procedure:
- Install EL-49642 SPS Programming Support Tool.
- Access the Service Programming System (SPS) and follow the on-screen
instructions.
- On the SPS Supported Controllers screen, select HVAC Control Module
- Programming and follow the on-screen instructions.
- On the SPS Supported Controllers screen, select HVAC Control Module
- Setup and follow the on-screen instructions.
- On the SPS Supported Controllers screen, select HVAC Control Module
- Configuration and follow the on-screen instructions.
- At the end of programming, choose the “Clear All DTCs” function on the
SPS screen.
- With a scan tool, perform the Actuator Recalibration Function. Refer
to Actuator Recalibration.
- Unsuccessful Programming Recovery
-
In the event of an interrupted or unsuccessful programming event, perform
the following steps:
- Ignition ON. Ensure the control module, DLC and programming tool connections
are secure and the SPS software is up to date.
- Verify the control module can be reprogrammed.
- If the control module cannot be reprogrammed
- Ignition OFF for one minute, ignition ON.
- Verify the control module can be reprogrammed.
- If the control module cannot be reprogrammed, replace the control module.
- If the control module can be reprogrammed.
- All OK.
- If the control module can be reprogrammed
- All OK.
- Repair Instructions
-
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for Control Module replacement, programming and
setup
HVAC Component Replacement Reference
Scan Tool Name
Component Code / Schematic Name
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Repair Instruction Name
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