Chevrolet Trax: Actuator recalibration (C67)
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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Fig. 7: Heater And Air Conditioni
Alignment Procedure
NOTE: The HVAC module must be removed to accurately set the mode
cam gear
timing. Failure to do so may result in poor HVAC performance, and
damage to the HVAC module.
Remove the
SEE MORE:
After the frontal airbags and
seat-mounted side impact airbags
inflate, they quickly deflate, so
quickly that some people may not
even realize an airbag inflated.
Roof-rail airbags may still be at least
partially inflated for some time after
they inflate. Some components of
the airbag module may be
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
Diagnostic Fault