Chevrolet Trax: Actuator recalibration
HVAC Control Module Replacement
When replacing or disconnecting the HVAC control module, it will be necessary
to perform a recalibration
process. When installing or reconnecting the HVAC control module, be sure to
perform the following:
Preferred Method (with Scan Tool)
NOTE: Do not adjust any controls on the HVAC control module while
the HVAC control
module is self-calibrating. If interrupted, improper HVAC performance will
result.
- Ignition OFF.
- Disconnect the scan tool.
- Install/connect the HVAC control module.
- Connect all previously disconnected components.
- Start the vehicle.
- With the scan tool, initiate the HVAC Actuators Learn feature of the
HVAC control module Special Functions menu.
- Operate system and verify that no DTCs have set as current DTCs.
- If DTC B101E 4B is set after attempting the actuator recalibration
procedure, perform the following:
- Verify which actuator does not have a scan tool learn status parameter
status of complete.
- Verify the unlearned actuator is physically rotating - A common cause of
DTC B101E 4B is an
actuator that is electrically OK but fails to physically rotate (e.g.
stripped gears).
- If the unlearned actuator is not physically rotating, replace the
actuator, otherwise replace the
HVAC control module.
Alternate Method (without Scan Tool)
NOTE: Do not adjust any controls on the HVAC control module while
the HVAC
control module is self-calibrating. If interrupted, improper HVAC
performance will result.
- Clear all DTCs.
- Ignition OFF.
- Install/connect the HVAC control module.
- Connect all previously disconnected components.
- Remove the HVAC control module fuse for a minimum of 10 s.
- Install the HVAC control module fuse.
- Start the vehicle.
- Wait 40 s for the HVAC control module to self-calibrate.
Actuator Replacement
When replacing an HVAC actuator it will be necessary to allow the HVAC
control module to perform a
recalibration process. When installing an HVAC actuator be sure to perform one
of the following:
Preferred Method (with Scan Tool)
NOTE: Do not adjust any controls on the HVAC control module while
the HVAC
control module is self-calibrating. If interrupted, improper HVAC
performance will result.
- Clear all DTCs.
- Ignition OFF.
- Install the HVAC actuator.
- Connect all previously disconnected components.
- Start the vehicle.
- With the scan tool, initiate the HVAC Actuators Relearn feature of the
HVAC control module Special
Functions menu.
- Operate system and verify that no DTCs have set as current DTCs.
- If DTC B101E 4B is set after attempting the actuator recalibration
procedure, perform the following:
- Verify which actuator does not have a scan tool learn status parameter
status of complete.
- Verify the unlearned actuator is physically rotating - A common cause of
DTC B101E 4B is an
actuator that is electrically OK but fails to physically rotate (e.g.
stripped gears).
- If the unlearned actuator is not physically rotating, replace the
actuator, otherwise replace the
HVAC control module.
Alternate Method (without Scan Tool)
NOTE: Do not adjust any controls on the HVAC control module while
the HVAC
control module is self-calibrating. If interrupted, improper HVAC
performance will result
- Clear all DTCs.
- Ignition OFF.
- Install the HVAC actuator.
- Connect all previously disconnected components.
- Remove the HVAC control module fuse for a minimum of 10 s.
- Install the HVAC control module fuse.
- Start the vehicle.
- Wait 40 s for the HVAC control module to self-calibrate.
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SEE MORE:
Interim Model Year Design Changes
The purpose of New Product Information is to document, important product
changes which occur either model
year-to-model year or interim model year.
Changes may include one or more of the following items:
Specification Changes
New sealants and/or adhesives
Disa
Special Tools
J 45859 Hub Spindle Remover
Fro regional special tools, refer to Special Tools.
Removal Procedure
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
Installation .
Fig. 17: Front Su