Chrysler Voyager. Manual — part 235
Symptom:
*NO RESPONSE FROM CABIN HEATER ASSIST - DIESEL ONLY
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE ECM
FUSED B+ CIRCUIT OPEN
GROUND CIRCUIT OPEN
SCI TRANSMIT CIRCUIT OPEN
CABIN HEATER ASSIST
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, attempt to communicate with the ECM.
Was the DRB able to I/D or communicate with the ECM?
All
Yes
→ Go To 2
No
→ Refer to the symptom list for problems related to no communica-
tion with the ECM.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Cabin Heater Assist C2 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 3
No
→ Check the IPM Fuse #15 for an open. If open, check for a short to
ground on the Fused B+ circuit. If not open, repair the Fused B+
circuit for an open.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the Cabin Heater Assist C2 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 4
No
→ Repair the ground circuit for an open.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the Cabin Heater Assist C1 harness connector.
Disconnect the DRB from the DLC.
Measure the resistance of the SCI Transmit circuit between the Cabin Heater Assist
connector and the DLC.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the SCI Transmit circuit for an open.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
367
COMMUNICATION
TEST
ACTION
APPLICABILITY
5
If there are no possible causes remaining, view repair.
All
Repair
Replace the Cabin Heater Assist in accordance with the service
information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
368
COMMUNICATION
*NO RESPONSE FROM CABIN HEATER ASSIST - DIESEL ONLY —
Continued
Symptom:
*NO RESPONSE FROM CONTROLLER ANTILOCK BRAKE
POSSIBLE CAUSES
NO RESPONSE FROM CAB
GROUND CIRCUIT OPEN
OPEN FUSED IGNITION SWITCH OUTPUT CIRCUIT
OPEN PCI BUS CIRCUIT
CONTROLLER ANTILOCK BRAKE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
Note: As soon as one or more module communicates with the DRB, answer
the question.
With the DRB, attempt to communicate with the Airbag Control Module (ACM).
With the DRB, attempt to communicate with the Body Control Module (BCM).
Was the DRB able to I/D or establish communications with either of the modules?
All
Yes
→ Go To 2
No
→ Refer to the Communications category and perform the symptom
PCI Bus Communication Failure.
Perform ABS VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the CAB harness connector.
Using a 12-volt test light connected to 12-volts, probe both ground circuits.
Is the test light illuminated for each circuit?
All
Yes
→ Go To 3
No
→ Repair the ground circuit(s) for an open.
Perform ABS VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the CAB harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused Ignition Switch
Output circuit.
Is the test light illuminated?
All
Yes
→ Go To 4
No
→ Repair the Fused Ignition Switch Output circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
369
COMMUNICATION
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 CAB 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. Set Probe to x10.
Press F2 again when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the CAB 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 5
No
→ Repair the PCI Bus circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
5
If there are no possible causes remaining, view repair.
All
Repair
Replace the Controller Antilock Brake in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
370
COMMUNICATION
*NO RESPONSE FROM CONTROLLER ANTILOCK BRAKE —
Continued
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