Jeep Grand Cherokee WK. Manual — part 1718
B10AF–RIGHT BLEND DOOR ACTUATOR PERFORMANCE (ATC) (CONTINUED)
3.
RUN ACTUATOR CALIBRATION TEST
With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select
View DTCs.
Does the scan tool display any DTCs?
Yes
>> Diagnose and repair the DTC(s). Refer to the Table of Contents in this Section for a complete list of all
HVAC related symptoms.
No
>> Go To 4
4.
CHECK MODE, BLEND & RECIRCULATION DOOR OPERATION
Start the engine.
Set the blower to high speed.
Operate each door in all positions in one direction and then in the opposite direction while monitoring the following:
•
For the Mode Doors, verify that air flows from each vent accordingly for the position selected on the A/C
Heater Control.
•
For the Blend Door, verify that the airflow air temperature changes accordingly for the temperature range
selected on the A/C Heater Control.
•
For the Recirculation Door, verify that the sound of the air flow get louder as the recirculation door opens to
bring in recirculated air or gets softer as the recirculation door closes to bring in fresh air.
Does each door operate properly?
Yes
>> The condition causing the fault has cleared at this time.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No
>> Remove the door actuator of the affected door from the A/C Heater Housing Assembly. By hand,
attempt to rotate the actuator in both directions. Inspect the A/C Heater Housing for damage, for dis-
connected, missing, or broken linkage, and for broken or binding doors. Repair as necessary in accor-
dance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
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B10A0–PANEL MODE DOOR 2 TRAVEL RANGE TOO LARGE (ATC)
For a complete wiring diagram Refer to Section 8W.
Theory of Operation
The A/C Heater Control calibrates each actuator individually. Automatic calibration occurs upon power up after
installing a new A/C Heater Control. Manual calibration occurs by sending a command with the scan tool. The pur-
pose of actuator calibration is to determine the total span of door travel between physical stops. To calibrate the
actuator, the A/C Heater Control first moves the door to its soft stop, and then counts the number of pulses it takes
to move the door to its other stop. An expected range of span is stored in the control’s memory. If the measured
calibration value exceeds the expected range for this actuator, this DTC will set. Note that the control clears all
stored calibration faults at the beginning of the calibration procedure.
•
When Monitored:
During actuator calibration.
•
Set Condition:
If the total span of the Rear Mode Door exceeds the high range limit.
Possible Causes
DOOR DRIVER ELECTRICAL CIRCUIT(S)
REAR MODE DOOR OR A/C HEATER HOUSING COMPONENTS WARPED, WORN, DAMAGED, MISSING,
BROKEN
REAR MODE DOOR ACTUATOR
A/C HEATER CONTROL
Diagnostic Test
1.
CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE & CONTROL CIRCUIT OPEN DTCs
Turn the ignition on.
With the scan tool, read active HVAC DTCs.
Does the scan tool display any active: XXXX CONTROL CIRCUIT/PERFORMANCE or XXXX CONTROL CIR-
CUIT OPEN DTCs?
Yes
>> Diagnose and repair the DTC(s). If present, diagnose and repair all Control Circuit/Performance DTCs
before diagnosing Control Circuit Open DTCs. Refer to the Table of Contents in this Section for a com-
plete list of all HVAC related symptoms.
No
>> Go To 2
2.
RUN THE ACTUATOR DTC DETECTION TEST
With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is com-
plete, select View DTCs.
Does the scan tool display any DTCs?
Yes
>> Diagnose and repair the DTC(s). If multiple DTCs are present, diagnose and repair all short high DTCs
first, all short low DTCs second, and all open DTCs last. Refer to the Table of Contents in this Section
for a complete list of all HVAC related symptoms.
No
>> Go To 3
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HVAC - ELECTRICAL DIAGNOSTICS
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B10A0–PANEL MODE DOOR 2 TRAVEL RANGE TOO LARGE (ATC) (CONTINUED)
3.
CHECK FOR A BROKEN REAR MODE DOOR ACTUATOR
Turn the ignition off.
Remove the Rear Mode Door Actuator from the A/C Heater Housing Assembly.
By hand, attempt to rotate the actuator in both directions.
Does the actuator turn in either direction?
Yes
>> Replace the Rear Mode Door Actuator in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No
>> Go To 4
4.
CHECK THE REAR MODE DOOR & A/C HEATER HOUSING FOR WARPED, WORN, DAMAGED, MISSING,
& BROKEN COMPONENTS
Inspect for excessively worn, disconnected, missing, or broken door linkage. Inspect for a damaged or broken A/C
Heater Housing Assembly. Inspect for a warped or broken door, and missing door seals. Rotate the door from stop
to stop. The door should rotate approximately 155 degrees.
Are there any physical or mechanical problems with the door or housing?
Yes
>> Repair as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No
>> Replace the Rear Mode Door Actuator in accordance with the Service Information. Then, Go To 5.
5.
RUN THE ACTUATOR THE CALIBRATION TEST
Turn the ignition on.
With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select
View DTCs.
Does the scan tool display: B10A0–PANEL MODE DOOR 2 TRAVEL RANGE TOO LARGE?
Yes
>> Replace the A/C Heater Control in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No
>> Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
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B10A1–PANEL MODE DOOR 2 ACTUATOR PERFORMANCE (ATC)
For a complete wiring diagram Refer to Section 8W.
Theory of Operation
The A/C Heater Control monitors the door driver circuits during actuator operation for conditions that prevent proper
door operation. If a pulse count error is detected the A/C Heater Control reports the fault as a Actuator Performance
DTC. It is important to note that this DTC only indicates that a fault occurred while driving a door actuator and that
additional testing is necessary to provide more details about the reported fault.
•
When Monitored:
When actuator movement is requested.
•
Set Condition:
If the A/C Heater Control detects a pulse count error while attempting to drive this door actuator.
Possible Causes
DOOR DRIVER CIRCUIT(S) SHORTED HIGH, SHORTED LOW, SHORTED TOGETHER, OPEN
DOOR ACTUATOR(S) BINDING, BROKEN
DOOR ACTUATOR(S) LINKAGE BINDING, DISCONNECTED, MISSING, BROKEN
A/C HEATER CONTROL
Diagnostic Test
1.
CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE & CONTROL CIRCUIT OPEN DTCs
Turn the ignition on.
With the scan tool, read active HVAC DTCs.
Does the scan tool display any active: XXXX CONTROL CIRCUIT/PERFORMANCE or XXXX CONTROL CIR-
CUIT OPEN DTCs?
Yes
>> Diagnose and repair the DTC(s). Refer to the Table of Contents in this Section for a complete list of all
HVAC related symptoms.
No
>> Go To 2
2.
RUN THE ACTUATOR DTC DETECTION TEST
With the scan tool, erase HVAC DTCs.
With the scan tool, select System Tests and then select Actuator DTC Detection. When the test is complete, select
View DTCs.
Does the scan tool display any DTCs?
Yes
>> Diagnose and repair the DTC(s). If multiple DTCs are present, diagnose and repair all short high DTCs
and then all short low DTCs. Refer to the Table of Contents in this Section for a complete list of all
HVAC related symptoms.
No
>> Go To 3
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HVAC - ELECTRICAL DIAGNOSTICS
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