Chrysler Voyager. Manual — part 290

Symptom:

*REAR BLOWER REAR CONTROL SWITCH INOP IN ONE OR
MORE SPEEDS - MTC

POSSIBLE CAUSES

REAR BLOWER MOTOR DRIVER CIRCUIT(S) OPEN

REAR BLOWER REAR CONTROL SWITCH

REAR BLOWER MOTOR FRONT CONTROL FEED CIRCUIT OPEN

A/C - HEATER CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the Rear Blower Rear Control Switch C1 harness connector.
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 each of the Rear Blower
Motor Driver circuits (Low, Medium, and High).
Does the test light illuminate brightly on each circuit?

All

Yes

→ Go To 2

No

→ Repair all Rear Blower Motor Driver circuits that failed to

illuminate the test light brightly for an open.
Perform BODY VERIFICATION TEST - VER 1.

2

Turn the Power switch on the A/C - Heater Control Module off.
Turn the ignition off.
Make sure that the Rear Blower Rear Control C1 harness connector is connected to
the Rear Blower Rear Control Switch.
Using a jumper wire connected to ground, back probe the Rear Blower Motor Front
Control Feed circuit in the Rear Blower Rear Control Switch C1 harness connector.
Turn the ignition on.
Turn the Power switch on the A/C - Heater Control Module on.
Turn the Blower switch on the Rear Blower Rear Control Switch to each speed
position.
Does the rear blower run in all speeds?

All

Yes

→ Go To 3

No

→ Replace the Rear Blower Rear Control Switch in accordance with

the Service Information.
Perform BODY VERIFICATION TEST - VER 1.

587

HEATING & A/C

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Disconnect the Rear Blower Front Control Switch harness connector.
Disconnect the Rear Blower Rear Control Switch C1 harness connector.
Measure the resistance of the Rear Blower Motor Front Control Feed circuit between
the Rear Blower Front Control Switch harness connector and the Rear Blower Rear
Control Switch C1 harness connector.
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 Rear Blower Motor Front Control Feed circuit for an

open.
Perform BODY VERIFICATION TEST - VER 1.

588

HEATING & A/C

*REAR BLOWER REAR CONTROL SWITCH INOP IN ONE OR MORE
SPEEDS - MTC —

Continued

Symptom:

ACCESSORY POWER OUTPUT 1 OPEN

When Monitored and Set Condition:

ACCESSORY POWER OUTPUT #1 OPEN

When Monitored:

Continuously with the ignition on.

Set Condition:

The FCM has detected an open in the Accessory Relay control circuit.

POSSIBLE CAUSES

FRONT CONTROL MODULE

FUSE & RELAY CENTER INTERNAL MALFUNCTION

ACCESSORY RELAY

FRONT CONTROL MODULE

INTERMITTENT CONDITION

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, erase the current Front Control Module DTC’s.

Turn the ignition off, wait 10 seconds then turn the ignition on.
With the DRBIII

t, read the current Front Control Module DTC’s.

Does the DRBIII

t display both the ACCESSORY POWER OUTPUT OPEN trouble

codes?

All

Yes

→ Go To 2

No

→ Go To 3

2

Turn the ignition off.
Disconnect the Accessory Relay from the Fuse & Relay Center.
Connect a known good relay to the Accessory Relay location in the Fuse & Relay
Center.
Turn the ignition on.
With the DRBIII

t, erase the current Front Control Module DTC’s.

Turn the ignition off, wait 10 seconds then turn the ignition on.
With the DRBIII

t, read the current Front Control Module DTC’s.

Does the DRBIII

t display both the ACCESSORY POWER OUTPUT OPEN trouble

codes?

All

Yes

→ Replace the Fuse and Relay Center.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the original Accessory Relay.

Perform BODY VERIFICATION TEST - VER 1.

589

IGNITION, POWER, ACCESSORY

TEST

ACTION

APPLICABILITY

3

Turn the ignition on.
With the DRBIII

t, read the current Front Control Module DTC’s.

Does the DRBIII

t display the ACCESSORY POWER OUTPUT 1 OPEN trouble code?

All

Yes

→ Replace the Front Control Module.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 4

4

Turn the ignition on.
With the DRBIII

t, read the current Front Control Module DTC’s.

Does the DRBIII

t display the ACCESSORY POWER OUTPUT #2 OPEN trouble

code?

All

Yes

→ Replace the Front Control Module.

Perform BODY VERIFICATION TEST - VER 1.

No

→ This symptom represents an internal malfunction in the Front

Control Module. The condition that caused this symptom is
currently not present.
Perform BODY VERIFICATION TEST - VER 1.

590

IGNITION, POWER, ACCESSORY

ACCESSORY POWER OUTPUT 1 OPEN —

Continued