Chrysler Voyager. Manual — part 211

TEST

ACTION

APPLICABILITY

7

With the DRBIII

t, read PCM/ECM DTC’s.

Are any HVAC related DTCs present?

All

Yes

→ Refer to the Powertrain Diagnostic Procedures Manual for the

related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.

No

→ Recheck the climate control system performance. Refer to Service

Information for additional information.
Perform BODY VERIFICATION TEST - VER 1.

271

AUTOMATIC TEMPERATURE CONTROL

*HVAC SYSTEM TEST —

Continued

Symptom:

*REAR ATC SWITCH LED(S)/BACK LIGHTING INOPERATIVE

POSSIBLE CAUSES

CHECK FOR ATC DTCS

CHECK FOR BCM DTCS

REAR ATC SWITCH - LED(S) INOPERATIVE

REAR ATC SWITCH - BACK LIGHTING INOPERATIVE

PANEL LAMPS DRIVER CIRCUIT OPEN

BODY CONTROL MODULE - PANEL LAMPS DRIVER OPEN

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, read ATC DTCs.

Does the DRBIII

t display any ATC DTCs?

All

Yes

→ Return to the symptom list and choose the symptom(s).

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 on.
With the DRBIII

t, read the BCM DTCs.

Does DRBIII

t display Headlamp Switch: Mismatch; STG; Open; or Panel Dim

Output Short?

All

Yes

→ Refer to symptoms Headlamp Switch Mismatch, Headlamp

Switch Shorted To Ground, and Headlamp Switch Open in the
Exterior Lighting catagory. Refer to symptom Panel Dimming
Output Short in the Instrument Cluster catagory.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 3

3

Turn the ignition on.
Turn the ATC Power switch on.
Turn the Rear System switch on the ATC Head to the Rear Control position.
Turn the Fan switch on the Rear ATC Switch to the Auto position.
Set the Rear Temp to the HI setting.
NOTE: Compare with a known good Rear ATC Switch.
While looking at the display on the Rear ATC Switch, press and hold the Temp
Up/Down control in the Down position.
Are all segments of the LEDs operating properly as the temperature changes from HI
to LO?

All

Yes

→ Go To 4

No

→ Replace the Rear ATC Switch in accordance with the Service

Information.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

272

AUTOMATIC TEMPERATURE CONTROL

TEST

ACTION

APPLICABILITY

4

Turn the ignition off.
Rotate the Panel Lamps Dimmer switch to the off position.
Disconnect the Rear ATC Switch 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 Rear ATC Switch 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 Rear ATC Switch harness connector.
Disconnect the Body Control Module C3 harness connector.
Measure the resistance of the Panel Lamps Driver circuit between the Rear ATC
Switch harness connector and the Body Control Module C3 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.

273

AUTOMATIC TEMPERATURE CONTROL

*REAR ATC SWITCH LED(S)/BACK LIGHTING INOPERATIVE —

Continued

Symptom:

*REAR BLOWER MOTOR INOPERATIVE

POSSIBLE CAUSES

FRONT CONTROL MODULE (FCM) DTC(S) PRESENT

IPM FUSE #12

FUSED REAR BLOWER RELAY OUTPUT CIRCUIT SHORTED TO GROUND

BLOWER MOTOR SHORTED TO GROUND

REAR BLOWER MOTOR POWER MODULE SHORTRD TO GROUND

GROUND CIRCUIT OPEN

REAR BLOWER MOTOR CONTROL CIRCUIT SHORTED TO VOLTAGE

REAR BLOWER MOTOR CONTROL CIRCUIT OPEN

REAR BLOWER MOTOR POWER MODULE OPEN

AUTOMATIC TEMPERATURE CONTROL MODULE OPEN

CHECK BLOWER MOTOR OPERATION

REAR BLOWER MOTOR POWER MODULE OPEN

IPM - OPEN CIRCUIT

IPM - OPEN CIRCUIT

REAR BLOWER MOTOR RELAY

IPM - OPEN CIRCUIT

FUSED REAR 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 #12.
Is the fuse open?

All

Yes

→ Go To 3

No

→ Go To 6

274

AUTOMATIC TEMPERATURE CONTROL