Chrysler Voyager. Manual — part 285

TEST

ACTION

APPLICABILITY

4

Turn the ignition off.
Disconnect the A/C - Heater Control C1 harness connector.
Disconnect the Body Control Module C4 harness connector.
Measure the resistance of the Panel Lamps Driver circuit between the A/C - Heater
Control C1 harness connector and the Body Control Module C4 harness connector.
Is the resistance below 5 ohms?

All

Yes

→ Replace the Body Control Module in accordance with the Service

Information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Repair the Panel Lamps Driver circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

567

HEATING & A/C

*FRONT A/C - HEATER CONTROL ILLUMINATION INOPERATIVE - MTC
—

Continued

Symptom:

*FRONT BLOWER MOTOR INOPERATIVE - MTC

POSSIBLE CAUSES

FRONT CONTROL MODULE (FCM) DTC(S) PRESENT

IPM FUSE #10

FUSED FRONT BLOWER MOTOR RELAY OUTPUT CIRCUIT SHORTED TO GROUND

FRONT BLOWER MOTOR RESISTOR BLOCK SHORTED TO GROUND

FRONT BLOWER MOTOR RESISTOR BLOCK SHORTED TO GROUND

BLOWER MOTOR

BLOWER MOTOR

A/C - HEATER CONTROL MODULE

GROUND CIRCUIT OPEN

BLOWER MOTOR HIGH DRIVER CIRCUIT OPEN

FRONT BLOWER MOTOR RESISTOR BLOCK OPEN

FRONT BLOWER MOTOR RESISTOR BLOCK OPEN

IPM - OPEN CIRCUIT

IPM - OPEN CIRCUIT

FRONT BLOWER MOTOR RELAY

IPM - OPEN CIRCUIT

FUSED FRONT BLOWER MOTOR RELAY OUTPUT CIRCUIT OPEN

TEST

ACTION

APPLICABILITY

1

With the DRBIII

t in Front Control Module, read the active DTCs.

Are any active FCM DTCs present?

All

Yes

→ For FCM DTCs related to the blower relay circuits, refer to the

Heating & A/C catagory. For all other FCM DTCs, refer to the
symptom list in the related catagory.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 2

2

Turn the ignition off.
Remove and inspect Intelligent Power Module (IPM) Fuse #10.
Is the fuse open?

All

Yes

→ Go To 3

No

→ Go To 7

568

HEATING & A/C

TEST

ACTION

APPLICABILITY

3

Replace IPM Fuse #10.
Turn the ignition on.
Turn the Power switch on the A/C - Heater Control Module on.
Operate the front blower in all speeds and modes.
Does the blower motor operate properly without blowing the fuse?

All

Yes

→ Check the Fused Front Blower Motor Relay Output circuit and

the High Speed Blower Motor circuit for an intermittent short to
ground. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 4

4

Turn the ignition off.
Disconnect the Front Blower Motor Resistor Block C1 harness connector.
Measure the resistance between ground and the Fused Front Blower Motor Relay
Output circuit.
Is the resistance below 10K ohms?

All

Yes

→ Repair the Fused Front Blower Motor Relay Output circuit for a

short to ground. Replace IPM Fuse #10.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the Front Blower Motor Resistor Block C1 harness connector.
Disconnect the Front Blower Motor Resistor Block C2 harness connector.
Measure the resistance between Front Blower Motor Resistor Block pin C2-2 and
pins C2-1, C1-1, C1-2, C1-3, C1-5, and C1-6.
Is there continuity between pin C2-2 and any other pin?

All

Yes

→ Replace the Front Blower Motor Resistor Block in accordance

with the Service Information. Replace IPM Fuse #10.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 6

6

Turn the ignition off.
Disconnect the Front Blower Motor Resistor Block C1 harness connector.
Disconnect the Front Blower Motor Resistor Block C2 harness connector.
Measure the resistance between Front Blower Motor Resistor Block pin C1-4 and
pins C2-1, C1-1, C1-2, C1-3, C1-5, and C1-6.
Is there continuity between pin C1-4 and any other pin?

All

Yes

→ Replace the Front Blower Motor Resistor Block in accordance

with the Service Information. Replace IPM Fuse #10.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Blower Motor in accordance with the Service Infor-

mation. Replace IPM Fuse #10.
Perform BODY VERIFICATION TEST - VER 1.

569

HEATING & A/C

*FRONT BLOWER MOTOR INOPERATIVE - MTC —

Continued

TEST

ACTION

APPLICABILITY

7

Ensure IPM Fuse #10 is installed.
Turn the ignition on.
Turn the Power switch on the A/C - Heater Control Module on.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Using a 12-volt test light connected to ground, back probe the High Speed Blower
Motor circuit in the Front Blower Motor Resistor Block C2 harness connector.
Does the test light illuminate brightly?

All

Yes

→ Go To 8

No

→ Go To 12

8

Turn the Power switch on the A/C - Heater Control Module off.
Turn the ignition off.
Using a jumper wire connected to ground, back probe the Rear Blower High Speed
circuit in the Front Blower Motor Resistor Block C2 harness connector.
Turn the ignition on.
Turn the Power switch on the A/C - Heater Control Module on.
Does the blower motor run at high speed?

All

Yes

→ Go To 9

No

→ Replace the Blower Motor in accordance with the Service Infor-

mation.
Perform BODY VERIFICATION TEST - VER 1.

9

Turn the Power switch on the A/C - Heater Control Module off.
Turn the ignition off.
Disconnect the A/C - Heater Control Module C2 harness connector.
Using a jumper wire connected to ground, back probe the Blower Motor High Driver
circuit in the A/C - Heater Control Module C2 harness connector.
Turn the ignition on.
Turn the Power switch on the A/C - Heater Control Module on.
Does the blower motor run at high speed?

All

Yes

→ Go To 10

No

→ Go To 11

10

Turn the ignition off.
Disconnect the A/C - Heater Control Module C2 harness connector.
Measure the resistance of the Ground circuit between the A/C - Heater Control
Module C2 harness connector and ground.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace the A/C - Heater Control Module in accordance with the

Service Information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Repair the Ground circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

570

HEATING & A/C

*FRONT BLOWER MOTOR INOPERATIVE - MTC —

Continued