Chrysler Pacifica. Manual — part 150
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, attempt to communicate with the applicable module(s) (BCM,
EMIC, PCM, DDM, PDM).
Is the DRBIII
t able to ID or communicate with the module(s)?
All
Yes
→ Replace the Automatic Temperature Control (ATC) in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Refer to the Communications category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
597
HEATING & A/C
NO COMMUNICATION WITH BCM (ACTIVE) - ATC —
Continued
Symptom List:
NO FUEL LEVEL MESSAGE RECEIVED (ACTIVE) - MTC
PCM COMMUNICATION FAILURE (ACTIVE) - MTC
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be NO FUEL LEVEL MESSAGE
RECEIVED (ACTIVE) - MTC.
When Monitored and Set Condition:
NO FUEL LEVEL MESSAGE RECEIVED (ACTIVE) - MTC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the A/C Heater Control does not receive the Fuel Level
message from the Powertrain Control Module (PCM) for more than 5 seconds.
PCM COMMUNICATION FAILURE (ACTIVE) - MTC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the A/C Heater Control does not receive the Fuel
message from the Powertrain Control Module (PCM) for more than 5 seconds.
POSSIBLE CAUSES
PCI BUS CIRCUIT FAULT
POWERTRAIN CONTROL MODULE (PCM) DTC(S) PRESENT
A/C HEATER CONTROL
POWERTRAIN CONTROL MODULE (PCM)
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, attempt to communicate with the Powertrain Control Module
(PCM).
Was the DRBIII
t able to communicate with the Powertrain Control Module (PCM)?
All
Yes
→ Go To 2
No
→ Refer to the Communication category for the related symptom(s)
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition on.
With the DRBIII
t, read Powertrain Control Module (PCM) DTCs.
Does the DRBIII
t display any DTCs?
All
Yes
→ Refer to Powertrain Diagnostic information for the related symp-
tom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
598
HEATING & A/C
TEST
ACTION
APPLICABILITY
3
Turn the ignition on.
With the DRBIII
t in HVAC, select Monitor Display and then select PCI Bus
Messages. From the list, select
9Fuel MSG Present.9
Does the DRBIII
t display: Fuel MSG Present: Yes?
All
Yes
→ Replace the A/C Heater Control in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace and program the Powertrain Control Module (PCM) in
accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
599
HEATING & A/C
NO FUEL LEVEL MESSAGE RECEIVED (ACTIVE) - MTC —
Continued
Symptom:
OUTSIDE AIR TEMP MESSAGE MISSING (ACTIVE) - ATC
When Monitored and Set Condition:
OUTSIDE AIR TEMP 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 Outside Air Temperature message from the Powertrain Control Module (PCM)
for more than 5 seconds.
POSSIBLE CAUSES
NO COMMUNICATION WITH POWETERTRAIN 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
message:
9OUTSIDE AIR TEMP:9
Is
9NO RESPONSE9 displayed after this message?
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.
600
HEATING & A/C
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