Chrysler Pacifica. Manual — part 167
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the ATC C2 harness connector.
Measure the resistance between ground and the Rear Mode Door Driver (A) circuit.
Measure the resistance between ground and the Rear Mode Door Driver (B) circuit.
Is the resistance below 10K ohms on either circuit?
All
Yes
→ Repair the Rear Mode Door Driver circuit with resistance below
10K ohms for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the Rear Mode Door Actuator harness connector.
Measure the resistance between the Rear Mode Door Driver (A) circuit and the Rear
Mode Door Driver (B) circuit.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Rear Mode Door Driver circuits for a short together.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Rear Mode Door Actuator in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the Rear Mode Door Actuator harness connector.
Measure the resistance of the Rear Mode Door Driver (A) circuit between the ATC C2
harness connector and the Rear Mode Door Actuator harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the Rear Mode Door Driver (A) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
6
Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the Rear Mode Door Actuator harness connector.
Measure the resistance of the Rear Mode Door Driver (B) circuit between the ATC C2
harness connector and the Rear Mode Door Actuator harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Rear Mode Door Actuator in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Rear Mode Door Driver (B) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
665
HEATING & A/C
*REAR MODE DOOR INOPERATIVE - ATC —
Continued
TEST
ACTION
APPLICABILITY
7
Turn the ignition off.
Disconnect the Rear Mode Door Actuator harness connector.
Turn the ignition on.
Set the MODE switch to the panel position. Wait approximately 15 seconds before
proceeding to the next step.
Turn the ignition off.
Connect a 12-volt Test Light between the Rear Mode Door Driver (A) circuit and the
Rear Mode Door Driver (B) circuit in the Rear Mode Door Actuator harness connector.
Turn the ignition on.
While monitoring the test light, set the MODE switch to the floor/mix/defrost
position. The test light should flash for 10 seconds.
While monitoring the test light, set the MODE switch to the panel position. The test
light should flash for 10 seconds.
Does the test light operate as specified?
All
Yes
→ Go To 8
No
→ Replace the Automatic Temperature Control (ATC) in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
8
Turn the ignition off.
Remove the rear booster fan blower housing.
Inspect the rear booster fan blower housing for a condition causing the rear mode
doors or linkage to bind.
Inspect for disconnected, missing, or broken door linkage.
Inspect for warped or broken doors.
By hand, attempt to move the rear mode doors in both directions. The doors should
operate smoothly in both directions.
Are there any mechanical problems with the doors, linkage, or housing?
All
Yes
→ Repair or replace the rear mode doors, linkage, or rear booster fan
blower housing as necessary in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Rear Mode Door Actuator in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
666
HEATING & A/C
*REAR MODE DOOR INOPERATIVE - ATC —
Continued
Symptom:
*VF SEGMENT(S)/LED(S) INOPERATIVE OR WILL NOT DIM - ATC
POSSIBLE CAUSES
OUTSIDE AIR TEMPERATURE DISPLAY INACCURATE OR INOPERATIVE
AUTOMATIC TEMPERATURE CONTROL (ATC) DTC(S) PRESENT
AUTOMATIC TEMPERATURE CONTROL (ATC)
TEST
ACTION
APPLICABILITY
1
Is the symptom outside air temp display inaccurate or inoperative?
All
Yes
→ Refer to symptom *Outside Air Temperature Display Inaccurate
Or Inoperative in the Heating & A/C category.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition on.
With the DRBIII
t, read the active ATC 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
Turn the ignition on.
Press the ATC’s PWR switch on.
NOTE: Compare with a known good ATC Head.
Operate all ATC switches while looking at the ATC display panel.
Are all of the LEDs & VF Segments operating properly?
All
Yes
→ Test Complete.
No
→ Replace the Automatic Temperature Control (ATC) in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
667
HEATING & A/C
Symptom:
BCM IGNITION MUX ERROR - IPM
When Monitored and Set Condition:
BCM IGNITION MUX ERROR - IPM
When Monitored:
When the IPM is powered up.
Set Condition:
IPM detects Ignition Switch DTC set in the BCM for 5 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
IPM
TEST
ACTION
APPLICABILITY
1
NOTE: Diagnose and repair any BCM Ignition MUX DTC’s before proceed-
ing with this test.
With the DRBIII
t, erase DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the DRBIII
t, read DTCs.
Did this DTC reset?
All
Yes
→ If there are no BCM Ignition MUX DTC’s and this code resets,
replace the IPM in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ The condition is not present at this time. Monitor DRBIIIt
parameters while wiggling the related wire harness. Refer to any
Technical Service Bulletins (TSB) that may apply. Visually in-
spect the related wiring harness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1.
668
IGNITION, POWER, ACCESSORY
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