Chrysler Pacifica. Manual — part 93
TEST
ACTION
APPLICABILITY
4
Note: Ensure there is PCI Bus communication with other modules on the
vehicle before proceeding. If not, refer to the symptom list from the menu
and repair as necessary.
Disconnect the Antilock Brake Module harness connector.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII
t select Pep Module Tools.
Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again
when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the Antilock Brake Module connector.
Turn the ignition on.
Observe the voltage display on the DRB Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?
All
Yes
→ Replace the Antilock Brake Module in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
No
→ Repair the PCI Bus circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
369
COMMUNICATION
*NO RESPONSE FROM ANTILOCK BRAKE MODULE —
Continued
Symptom:
*NO RESPONSE FROM AUTOMATIC TEMPERATURE CONTROL
MODULE
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE BCM
GROUND CIRCUIT OPEN
FUSED (B+) CKT OPEN
FUSED RUN RELAY OUTPUT CIRCUIT OPEN
OPEN PCI BUS CIRCUIT
AUTOMATIC TEMPERATURE CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, enter Body then Body Computer.
Was the DRB able to I/D or communicate with the BCM?
All
Yes
→ Go To 2
No
→ Refer to the symptom list for problems related to no communica-
tion with the BCM.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the ATC C1 harness connector.
Using a 12-volt test light connected to 12-volts, probe the Ground circuit.
Is the test light illuminated?
All
Yes
→ Go To 3
No
→ Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the ATC C1 harness connector.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit.
Is the test light illuminated?
All
Yes
→ Go To 4
No
→ Repair the Fused B+ circuit for an open or short. Refer to the
wiring diagrams in the service information.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the ATC C1 harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused Run Relay Output
circuit.
Is the test light illuminated?
All
Yes
→ Go To 5
No
→ Repair the Fused Run Relay Output circuit for an open or short.
Refer to the wiring diagrams in the service information.
Perform BODY VERIFICATION TEST - VER 1.
370
COMMUNICATION
TEST
ACTION
APPLICABILITY
5
Note: Ensure there is PCI Bus communication with other modules on the
vehicle before proceeding. If not, refer to the symptom list from the menu
and repair as necessary.
Disconnect the ATC C1 harness connector.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII
t select Pep Module Tools.
Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again
when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the ATC connector.
Turn the ignition on.
Observe the voltage display on the DRB Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?
All
Yes
→ Go To 6
No
→ Repair the PCI Bus circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
6
If there are no possible causes remaining, view repair.
All
Repair
Replace the Automatic Temperature Control Module in accor-
dance with the service information.
Perform BODY VERIFICATION TEST - VER 1.
371
COMMUNICATION
*NO RESPONSE FROM AUTOMATIC TEMPERATURE CONTROL MOD-
ULE —
Continued
Symptom:
*NO RESPONSE FROM BODY CONTROL MODULE
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH ANOTHER MODULE
FUSED (B+) CKT OPEN
IGNITION SWITCH OUTPUT CIRCUIT OPEN
OPEN GROUND CIRCUIT(S)
OPEN PCI BUS CIRCUIT
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, attempt to communicate with the Occupant Restraint Controller
(ORC).
With the DRB, attempt to communicate with the Instrument Cluster.
Was the DRB able to I/D or communicate with the ORC and the CAB?
All
Yes
→ Go To 2
No
→ Refer to symptom list for problems related to the PCI Bus
Communication Failure.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the BCM C1 and C2 harness connectors.
Using a 12-volt test light connected to ground, probe each Fused B+ circuit.
Is the test light illuminated for each circuit?
All
Yes
→ Go To 3
No
→ Check fuses in the IPM for an open. If ok, repair the Fused B+
circuit(s) for an open or short. Refer to the wiring diagrams in the
service information.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the BCM C2 harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Ignition Switch Output
circuit.
Is the test light illuminated?
All
Yes
→ Go To 4
No
→ Repair the Ignition Switch Output circuit for an open or short.
Refer to the wiring diagrams in the service information.
Perform BODY VERIFICATION TEST - VER 1.
372
COMMUNICATION
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