Chrysler Voyager. Manual — part 208

TEST

ACTION

APPLICABILITY

4

Turn the ignition off.
Rotate the Panel Lamps Dimmer switch to the off position.
Disconnect the ATC C2 harness connector.
Turn the park lamps on.
Measure the voltage of the Panel Lamps Driver circuit while rotating the Panel
Lamps Dimmer switch from the off position to the full brightness position.
Does the voltage change from approximately 2.5 volts to 11.5 volts?

All

Yes

→ Replace the ATC in accordance with the Service Information.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the Body Control Module C4 harness connector.
Measure the resistance of the Panel Lamps Driver circuit between the ATC C2
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.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Repair the Panel Lamps Driver circuit for an open.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

259

AUTOMATIC TEMPERATURE CONTROL

*ATC HEAD LED(S)/BACK LIGHTING INOPERATIVE —

Continued

Symptom:

*FRONT BLOWER MOTOR INOPERATIVE

POSSIBLE CAUSES

FRONT CONTROL MODULE (FCM) DTC(S) PRESENT

IPM FUSE #10

FUSED FRONT BLOWER MOTOR RELAY OUTPUT CIRCUIT SHORTED TO GROUND

BLOWER MOTOR SHORTED TO GROUND

FRONT BLOWER POWER MODULE SHORTRD TO GROUND

GROUND CIRCUIT OPEN

BLOWER MOTOR CONTROL CIRCUIT SHORTED TO VOLTAGE

BLOWER MOTOR CONTROL CIRCUIT OPEN

FRONT BLOWER POWER MODULE OPEN

AUTOMATIC TEMPERATURE CONTROL MODULE OPEN

CHECK BLOWER MOTOR OPERATION

FRONT BLOWER POWER MODULE 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 FCM, 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.
With the DRBIII

t, reset the ATC after repair is complete.

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 6

260

AUTOMATIC TEMPERATURE CONTROL

TEST

ACTION

APPLICABILITY

3

Replace IPM Fuse #10.
Turn the ignition on.
Operate the blower motor in all speeds.
Start the engine and operate the ATC system in all modes and speeds.
Does the blower motor operate properly without blowing the fuse?

All

Yes

→ Refer to the wiring diagrams located in the service information to

help isolate a possible intermittent short to ground condition.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 4

4

Turn the ignition off.
Disconnect the Front Blower Power Module 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.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 5

5

Turn the ignition off.
Replace IPM Fuse #10.
Disconnect the Front Blower Power Module C1 harness connector.
Disconnect the Front Blower Power Module C2 harness connector.
Connect a jumper wire between the Fused Front Blower Motor Relay Output circuit
in the Front Blower Power Module C1 harness connector and the DB wire in the
Front Blower Power Module C2 harness connector.
Connect a jumper wire between the Ground circuit in the Front Blower Power
Module C1 harness connector and the DB/YL wire in the Front Blower Power Module
C2 harness connector.
Turn the ignition on.
Does the Blower Motor operate at full speed without blowing the fuse?

All

Yes

→ Replace the Front Blower Power Module in accordance with the

Service Information. Replace IPM Fuse #10.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

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

mation. Replace IPM Fuse #10.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

6

Ensure IPM Fuse #10 is installed.
Disconnect the Front Blower Power Module C1 harness connector.
Turn the ignition 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 Fused Front Blower
Motor Relay Output circuit in the Front Blower Power Module C1 harness connector.
Does the test light illuminate brightly?

All

Yes

→ Go To 7

No

→ Go To 13

261

AUTOMATIC TEMPERATURE CONTROL

*FRONT BLOWER MOTOR INOPERATIVE —

Continued

TEST

ACTION

APPLICABILITY

7

Turn the ignition off.
Disconnect the Front Blower Power Module C1 harness connector.
Measure the resistance between ground and the Ground circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 8

No

→ Repair the Ground circuit for an open.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

8

Turn the ignition off.
Disconnect the Front Blower Power Module C1 harness connector.
Disconnect the Automatic Temperature Control Module C2 harness connector.
Turn the ignition on.
Measure the voltage of the Blower Motor Control circuit.
Is there any voltage present?

All

Yes

→ Repair the Blower Motor Control circuit for a short to voltage.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 9

9

Turn the ignition off.
Disconnect the Front Blower Power Module C1 harness connector.
Disconnect the Automatic Temperature Control Module C2 harness connector.
Measure the resistance of the Blower Motor Control circuit between the Front Blower
Power Module C1 harness connector and the Automatic Temperature Control Module
C2 harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 10

No

→ Repair the Blower Motor Control circuit for an open.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

10

Turn the ignition off.
Make sure that the Front Blower Power Module C1 harness connector is connected
to the Front Blower Power Module.
Make sure that the Automatic Temperature Control Module C2 harness connector is
connected to the Automatic Temperature Control Module.
Start the engine.
Press the ATC Power Switch on.
Set the blower switch to the LO speed position.
While back probing, measure the voltage of the Blower Motor Control circuit in the
Automatic Temperature Control Module C2 harness connector.
Is the voltage above 10.0 volts?

All

Yes

→ Go To 11

No

→ Replace the Front Blower Power Module in accordance with the

Service Information.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

262

AUTOMATIC TEMPERATURE CONTROL

*FRONT BLOWER MOTOR INOPERATIVE —

Continued