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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Текст

Политика конфиденциальности