Chrysler Pacifica. Manual — part 137
POSSIBLE CAUSES
ACTUATOR CIRCUIT TEST FAULT(S) PRESENT
ACTIVE HVAC DTC(S) PRESENT
MODE LINKAGE/DOOR BINDING
PASSENGER BLEND LINKAGE/DOOR BINDING
DRIVER BLEND LINKAGE/DOOR BINDING
RECIRCULATION LINKAGE/DOOR BINDING
DOOR ACTUATOR DRIVER CIRCUIT OPEN
COMMON DOOR DRIVER CIRCUIT OPEN
DOOR ACTUATOR
BROKEN ACTUATOR/LINKAGE/DOOR
A/C HEATER CONTROL
INTERMITTENT WIRING PROBLEM
INTERMITTENT WIRING PROBLEM
TEST
ACTION
APPLICABILITY
1
NOTE: All Actuator Circuit Test fault messages and Overcurrent DTCs must
be repaired before diagnosing Calibration fault messages.
Turn the ignition on.
With the DRBIII
t in HVAC, System Tests, actuate the Actuator Circuit Test.
Does the DRBIII
t display any Actuator Circuit Test fault messages?
All
Yes
→ Return to the Heating & A/C symptom list and choose the
symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
NOTE: All Actuator Circuit Test fault messages and Overcurrent DTCs must
be repaired before diagnosing Calibration fault messages.
Turn the ignition on.
With the DRBIII
t, read active HVAC DTCs.
Does the DRBIII
t display any DTCs?
All
Yes
→ Return to the Heating & A/C symptom list and choose the
symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
545
HEATING & A/C
BLEND CALIBRATION FAULT - MTC —
Continued
TEST
ACTION
APPLICABILITY
3
Which HVAC Door Recalibration fault message is present?
All
Mode Calibration Fault
Blend Calibration Fault
Zone Calibration Fault
Recirculation Calibration Fault
4
NOTE: After completing HVAC Door Recalibration, the DRBIII
t will store
the total span and the status of each door actuator. Selecting HVAC Door
Cal Monitor in System Tests will display this information.
With the DRBIII
t in HVAC, select System Tests, and then select HVAC Door Cal
Monitor.
Which message does the DRBIII
t display for Mode Status?
All
No Pulses
Too Few Pulses
Inspect the A/C Heater Housing Assembly for a condition causing
the mode linkage/door to bind. Repair as necessary in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Too Many Pulses
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Broken Linkage
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
546
HEATING & A/C
BLEND CALIBRATION FAULT - MTC —
Continued
TEST
ACTION
APPLICABILITY
5
NOTE: After completing HVAC Door Recalibration, the DRBIII
t will store
the total span and the status of each door actuator. Selecting HVAC Door
Cal Monitor in System Tests will display this information.
With the DRBIII
t in HVAC, select System Tests, and then select HVAC Door Cal
Monitor.
Which message does the DRBIII
t display for Blend Status?
All
No Pulses
Too Few Pulses
Inspect the A/C Heater Housing Assembly for a condition causing
the passenger blend linkage/door to bind. Repair as necessary in
accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Too Many Pulses
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Broken Linkage
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
6
NOTE: After completing HVAC Door Recalibration, the DRBIII
t will store
the total span and the status of each door actuator. Selecting HVAC Door
Cal Monitor in System Tests will display this information.
With the DRBIII
t in HVAC, select System Tests, and then select HVAC Door Cal
Monitor.
Which message does the DRBIII
t display for Zone Status?
All
No Pulses
Too Few Pulses
Inspect the A/C Heater Housing Assembly for a condition causing
the driver blend linkage/door to bind. Repair as necessary in
accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Too Many Pulses
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Broken Linkage
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
547
HEATING & A/C
BLEND CALIBRATION FAULT - MTC —
Continued
TEST
ACTION
APPLICABILITY
7
NOTE: After completing HVAC Door Recalibration, the DRBIII
t will store
the total span and the status of each door actuator. Selecting HVAC Door
Cal Monitor in System Tests will display this information.
With the DRBIII
t in HVAC, select System Tests, and then select HVAC Door Cal
Monitor.
Which message does the DRBIII
t display for Recirc Status?
All
No Pulses
Too Few Pulses
Inspect the A/C Heater Housing Assembly for a condition causing
the recirculation linkage/door to bind. Repair as necessary in
accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Too Many Pulses
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Broken Linkage
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
8
Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Measure the resistance between the Common Door Driver circuit and the applicable
door driver circuit.
Is the resistance above 70.0 ohms?
All
Yes
→ Go To 9
No
→ Go To 11
9
Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Remove the applicable door actuator from the A/C Heater Housing Assembly.
Disconnect the door actuator harness connector.
Measure the resistance of the door driver circuit between the A/C Heater Control C1
harness connector and the door actuator harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 10
No
→ Repair the door driver circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
548
HEATING & A/C
BLEND CALIBRATION FAULT - MTC —
Continued
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