Chrysler Pacifica. Manual — part 158
Symptom:
*BLEND/MODE/RECIRC DOOR OPERATION IMPROPER - MTC
POSSIBLE CAUSES
ACTUATOR CIRCUIT TEST FAULT(S) PRESENT
ACTIVE HVAC DTC(S) PRESENT
HVAC DOOR RECALIBRATION FAULT(S) PRESENT
DOOR ACTUATOR
DOOR ACTUATOR LINKAGE
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
3
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 HVAC Door Recalibration
Test.
Does the DRBIII
t display any HVAC Door Recalibration 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 4
629
HEATING & A/C
TEST
ACTION
APPLICABILITY
4
Which door did customer ID as faulty?
All
Mode Door
Passenger Blend Door
Driver Blend Door
Recirculation Door
5
Start the engine.
Press the A/C Heater Control’s power switch on.
Turn the blower control to the high speed position.
Turn the mode control to each door position for a minimum of 30 seconds and check
for airflow from the corresponding vents.
Does air flow from the correct vents for each door position?
All
Yes
→ Test Complete.
No
→ Go To 9
6
Start the engine.
Press the A/C Heater Control’s power switch on.
Turn the blower control to the high speed position.
Turn the mode control to the panel position.
Move the passenger blend control to the full hot position.
Move the passenger blend control to the full cold position, in 25% increments, while
checking for a change in airflow air temperature coming from the passenger’s panel
vents.
Does the airflow air temperature change with respect to the position of the blend
control?
All
Yes
→ Test Complete.
No
→ Go To 9
7
Start the engine.
Press the A/C Heater Control’s power switch on.
Turn the blower control to the high speed position.
Turn the mode control to the panel position.
Move the driver blend control to the full hot position.
Move the driver blend control to the full cold position, in 25% increments, while
checking for a change in airflow air temperature coming from the driver’s panel
vents.
Does the airflow air temperature change with respect to the position of the blend
control?
All
Yes
→ Test Complete.
No
→ Go To 9
630
HEATING & A/C
*BLEND/MODE/RECIRC DOOR OPERATION IMPROPER - MTC —
Continued
TEST
ACTION
APPLICABILITY
8
Start the engine.
Press the A/C Heater Control’s power switch on.
Turn the blower control to the high speed position.
Turn the mode control to the panel position.
Make sure that recirc is switched off (status indicator not illuminated).
Press the recirc switch on (status indicator illuminated). The sound of the air flowing
through the ducts should get louder as the recirculation door opens to bring in recirc
air.
Does the sound of the airflow get louder after pressing the recirc switch on?
All
Yes
→ Test Complete.
No
→ Go To 9
9
Turn the ignition off.
Remove the applicable 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?
All
Yes
→ Replace the door actuator in accordance with the Service Infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Inspect for disconnected, missing, or broken door actuator link-
age. Repair as necessary in accordance with the Service Informa-
tion.
Perform BODY VERIFICATION TEST - VER 1.
631
HEATING & A/C
*BLEND/MODE/RECIRC DOOR OPERATION IMPROPER - MTC —
Continued
Symptom:
*BLOWER MOTOR INOPERATIVE - MTC
POSSIBLE CAUSES
INTEGRATED POWER MODULE (IPM) DTC(S) PRESENT
IPM FRONT BLOWER FUSE
FUSED FRONT BLOWER MOTOR RELAY OUTPUT CIRCUIT SHORTED TO GROUND
BLOWER MOTOR RESISTOR BLOCK SHORTED TO GROUND
BLOWER MOTOR RESISTOR BLOCK SHORTED TO GROUND
BLOWER MOTOR
BLOWER MOTOR
A/C HEATER CONTROL
GROUND CIRCUIT OPEN
BLOWER MOTOR HIGH DRIVER CIRCUIT OPEN
BLOWER MOTOR RESISTOR BLOCK OPEN
BLOWER MOTOR RESISTOR BLOCK OPEN
IPM - OPEN CIRCUIT
IPM - OPEN CIRCUIT
FRONT BLOWER MOTOR RELAY
IPM - OPEN CIRCUIT
FUSED FRONT BLOWER MOTOR RELAY OUTPUT CIRCUIT OPEN
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, read Integrated Power Module (IPM) DTCs.
Did the DRBIII
t display any DTCs?
All
Yes
→ For Integrated Power Module (IPM) DTCs related to the front
blower relay circuits, refer to the Heating & A/C category. For all
other IPM DTCs, refer to the symptom list in the related category.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition off.
Remove and inspect IPM Front Blower Fuse.
Is the fuse open?
All
Yes
→ Go To 3
No
→ Go To 7
632
HEATING & A/C
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