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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

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.

→ Go To 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.

→ Go To 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.

→ Go To 4

629

HEATING & A/C

TEST

ACTION

APPLICABILITY

Which door did customer ID as faulty?

All

Mode Door

Passenger Blend Door

Driver Blend Door

Recirculation Door

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.

→ Go To 9

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.

→ Go To 9

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.

→ Go To 9

630

HEATING & A/C

*BLEND/MODE/RECIRC DOOR OPERATION IMPROPER - MTC —

Continued

TEST

ACTION

APPLICABILITY

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.

→ Go To 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.

→ 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

A/C HEATER CONTROL

GROUND CIRCUIT OPEN

BLOWER MOTOR HIGH DRIVER CIRCUIT OPEN

BLOWER MOTOR RESISTOR BLOCK OPEN

IPM - OPEN CIRCUIT

FRONT BLOWER MOTOR RELAY

IPM - OPEN CIRCUIT

FUSED FRONT BLOWER MOTOR RELAY OUTPUT CIRCUIT OPEN

TEST

ACTION

APPLICABILITY

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.

→ Go To 2

Turn the ignition off.
Remove and inspect IPM Front Blower Fuse.
Is the fuse open?

All

Yes

→ Go To 3

→ Go To 7

632

HEATING & A/C

Content .. 156 157 158 159 ..