Chrysler Voyager. Manual — part 270

TEST

ACTION

APPLICABILITY

4

Turn the ignition off.
Disconnect the Body Control Module C5 harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance between the Multifunction Switch MUX Return circuit and
the Turn Signal Switch MUX circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the Turn Signal Switch MUX circuit for a short to the

Multifunction Switch MUX Return circuit.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the Body Control Module C5 harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance between the Multifunction Switch MUX Return circuit and
ground.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the Multifunction Switch MUX Return circuit for a short

to ground.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Body Control Module.

Perform BODY VERIFICATION TEST - VER 1.

507

EXTERIOR LIGHTING

TURN SIGNAL SWITCH INPUT SHORT —

Continued

Symptom List:

A/C SWITCH FAULT (ACTIVE) - MTC
CHECKSUM FAILURE (ACTIVE) - MTC
DEFOG SWITCH FAULT (ACTIVE) - MTC
POWER SWITCH FAULT (ACTIVE) - MTC
RECIRC SWITCH FAULT (ACTIVE) - MTC

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be A/C SWITCH FAULT (ACTIVE) -
MTC.

When Monitored and Set Condition:

A/C SWITCH FAULT (ACTIVE) - MTC

When Monitored:

With the ignition on.

Set Condition:

This DTC will set if the A/C switch stays closed for 10 minutes.

CHECKSUM FAILURE (ACTIVE) - MTC

When Monitored:

With the ignition on.

Set Condition:

This DTC will set if the calculated check sum does not match the stored

value.

DEFOG SWITCH FAULT (ACTIVE) - MTC

When Monitored:

With the ignition on.

Set Condition:

This DTC will set if the EBL switch stays closed for 10 minutes.

POWER SWITCH FAULT (ACTIVE) - MTC

When Monitored:

With the ignition on.

Set Condition:

This DTC will set if the Power switch stays closed for 10 minutes.

RECIRC SWITCH FAULT (ACTIVE) - MTC

When Monitored:

With the ignition on.

Set Condition:

This DTC will set if the Recirc switch stays closed for 10 minutes.

POSSIBLE CAUSES

A/C - HEATER CONTROL MODULE

508

HEATING & A/C

TEST

ACTION

APPLICABILITY

1

View repair

All

Repair

Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.

509

HEATING & A/C

A/C SWITCH FAULT (ACTIVE) - MTC —

Continued

Symptom List:

A/C SWITCH FAULT (STORED) - MTC
BACKLIGHT DIMMING RX FAILURE (STORED) - MTC
BLEND OVERCURRENT (STORED) - MTC
CHECKSUM FAILURE (STORED) - MTC
DEFOG SWITCH FAULT (STORED) - MTC
EVAPORATOR

TEMPERATURE

SENSOR

CIRCUIT

OPEN

(STORED) - MTC
EVAPORATOR

TEMPERATURE

SENSOR

CIRCUIT

SHORT

(STORED) - MTC
LOOPBACK TEST FAILURE (STORED) - MTC
MODE OVERCURRENT (STORED) - MTC
NO FUEL LEVEL MESSAGE RECEIVED (STORED) - MTC
PCM COMMUNICATION FAILURE (STORED) - MTC
POWER SWITCH FAULT (STORED) - MTC
REAR BLEND OVERCURRENT (STORED) - MTC
REAR BLEND POT CIRCUIT OPEN (STORED) - MTC
REAR BLEND POT CIRCUIT SHORT (STORED) - MTC
REAR MODE OVERCURRENT (STORED) - MTC
RECIRC OVERCURRENT (STORED) - MTC
RECIRC SWITCH FAULT (STORED) - MTC
TX FAILURE (STORED) - MTC
VEHICLE ODOMETER FAILURE (STORED) - MTC
ZONE OVERCURRENT (STORED) - MTC

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be A/C SWITCH FAULT (STORED) -
MTC.

When Monitored and Set Condition:

A/C SWITCH FAULT (STORED) - MTC

When Monitored:

With the ignition on.

Set Condition:

This DTC will set if the A/C switch stays closed for 10 minutes.

BACKLIGHT DIMMING RX FAILURE (STORED) - MTC

When Monitored:

With the ignition on.

Set Condition:

If the A/C - Heater Control Module does not receive the dimming function

message from the BCM for more than 5 seconds, then the A/C - Heater Control Module
LEDs will default to full brightness and the DTC will set.

510

HEATING & A/C