Chrysler Pacifica. Manual — part 154
TEST
ACTION
APPLICABILITY
3
Remove the Recirculation Door Actuator from the A/C-Heater Housing assembly.
Rotate the recirculation door from stop to stop. Note: The door should rotate
approximately 45 degrees from stop to stop.
Does the recirculation door move smoothly in both directions?
All
Yes
→ Replace the Recirculation Door Actuator in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair or replace the recirculation door as necessary in accor-
dance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
613
HEATING & A/C
RECIRC DOOR TRAVEL TOO SMALL (ACTIVE) - ATC —
Continued
Symptom:
REFRIGERANT PRESS MESSAGE MISSING (ACTIVE) - ATC
When Monitored and Set Condition:
REFRIGERANT PRESS MESSAGE MISSING (ACTIVE) - ATC
When Monitored:
With the ignition on and the IOD fuse installed.
Set Condition:
This DTC will set if the Automatic Temperature Control (ATC) does not
receive the message from the Powertrain Control Module (PCM) for more than 16 seconds.
This message provides A/C Hi-Side Pressure and Intake Air Temperature.
POSSIBLE CAUSES
NO COMMUNICATION WITH POWERTRAIN CONTROL MODULE (PCM)
POWERTRAIN CONTROL MODULE (PCM) DTC(S) PRESENT
AUTOMATIC TEMPERATURE CONTROL (ATC)
POWERTRAIN CONTROL MODULE (PCM)
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, read the active ATC DTCs.
Does the DRBIII
t display: NO COMMUNICATION WITH PCM?
All
Yes
→ Return to the Heating & A/C symptom list and choose the
symptom.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition on.
With the DRBIII
t, read PCM DTCs.
Does the DRBIII
t display any DTCs?
All
Yes
→ Refer to the Powertrain Diagnostic Information for the related
symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition on.
With DRBIII
t in ATC, Monitor Display, PCI Bus Messages, look for the following
messages:
9A/C HI-SIDE PRESSURE:9
9INTAKE AIR TEMP:9
Is
9NO RESPONSE9 displayed after either of these messages?
All
Yes
→ Replace the Powertrain Control Module (PCM) in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Automatic Temperature Control (ATC) in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
614
HEATING & A/C
Symptom:
TX FAILURE (ACTIVE) - MTC
When Monitored and Set Condition:
TX FAILURE (ACTIVE) - MTC
When Monitored:
When the ignition is on.
Set Condition:
This DTC will set if the A/C Heater Control is unable to broadcast a
message.
POSSIBLE CAUSES
ACTIVE HVAC DTC(S) PRESENT
PCI BUS CIRCUIT FAULT
A/C HEATER CONTROL
INTERMITTENT WIRING PROBLEM
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, read active HVAC DTCs.
Does the DRBIII
t display any additional HVAC 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 2
2
Turn the ignition on.
With the DRBIII
t, attempt to communicate with the Powertrain Control Module
(PCM).
With the DRBIII
t, attempt to communicate with the Body Control Module (BCM).
With the DRBIII
t, attempt to communicate with the Integrated Power Module
(IPM).
Was the DRBIII
t able to communicate with the PCM, BCM and IPM?
All
Yes
→ Go To 3
No
→ Refer to the Communication category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
615
HEATING & A/C
TEST
ACTION
APPLICABILITY
3
Turn the ignition on.
With the DRBIII
t, erase HVAC DTCs.
Cycle the ignition switch and wait approximately 1 minute.
With the DRBIII
t, read HVAC DTCs.
Did this DTC reset?
All
Yes
→ Replace the A/C Heater Control in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Using the wiring schematic as a guide, inspect the related wiring
for chafed, pierced, pinched, and partially broken wires. Inspect
the related connectors for broken, bent, pushed out, and corroded
terminals. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
616
HEATING & A/C
TX FAILURE (ACTIVE) - MTC —
Continued
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