Chrysler Voyager. Manual — part 286

TEST

ACTION

APPLICABILITY

11

Turn the ignition off.
Disconnect the A/C - Heater Control Module C2 harness connector.
Disconnect the Front Blower Motor Resistor Block C1 harness connector.
Measure the resistance of the Blower Motor High Driver circuit between the A/C -
Heater Control Module C2 harness connector and the Front Blower Motor Resistor
Block C1 harness connector.
Is the resistance below 5 ohms?

All

Yes

→ Replace the Front Blower Motor Resistor Block in accordance

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

No

→ Repair the Blower Motor High Driver circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

12

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 Fused Front Blower
Motor Relay Output circuit in the Front Blower Motor Resistor Block C1 harness
connector.
Does the test light illuminate brightly?

All

Yes

→ Replace the Front Blower Motor Resistor Block in accordance

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

No

→ Go To 13

13

Turn the ignition off.
Remove the Front Blower Motor Relay from the IPM.
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, probe cavity 30 of the Front Blower
Motor Relay connector.
Does the test light illuminate brightly?

All

Yes

→ Go To 14

No

→ Replace the IPM in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1.

14

Turn the ignition off.
Remove the Front Blower Motor Relay from the IPM.
Remove IPM Fuse #10.
Measure the resistance between cavity 87 of the Front Blower Motor Relay connector
and IPM Fuse #10 (power input cavity).
Is the resistance below 5 ohms?

All

Yes

→ Go To 15

No

→ Replace the IPM in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1.

571

HEATING & A/C

*FRONT BLOWER MOTOR INOPERATIVE - MTC —

Continued

TEST

ACTION

APPLICABILITY

15

Turn the ignition off.
Make sure that the Front Blower Motor Relay is installed.
Remove IPM Fuse #10.
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, probe IPM Fuse #10 (power input
cavity).
Does the test light illuminate brightly?

All

Yes

→ Go To 16

No

→ Replace the Front Blower Motor Relay in accordance with the

Service Information.
Perform BODY VERIFICATION TEST - VER 1.

16

Turn the ignition off.
Remove IPM Fuse #10.
Disconnect the IPM C6 harness connector.
Measure the resistance between IPM Fuse #10 (power output cavity) and cavity 7 of
the IPM C6 connector (IPM side).
Is the resistance below 5 ohms?

All

Yes

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

open.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the IPM in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1.

572

HEATING & A/C

*FRONT BLOWER MOTOR INOPERATIVE - MTC —

Continued

Symptom:

*FRONT BLOWER MOTOR SPEEDS INCORRECT - MTC

POSSIBLE CAUSES

BLOWER MOTOR DRIVER CIRCUIT(S) SHORTED TO GROUND

BLOWER MOTOR DRIVER CIRCUIT(S) SHORTED TO VOLTAGE

BLOWER MOTOR DRIVER CIRCUITS SHORTED TOGETHER

A/C - HEATER CONTROL MODULE - SPEEDS INCORRECT

BLOWER MOTOR DRIVER CIRCUIT(S) OPEN

BLOWER MOTOR RESISTOR BLOCK - OPEN SPEED

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the A/C - Heater Control Module C2 harness connector.
Disconnect the Front Blower Motor Resistor Block C1 harness connector.
Measure the resistance between ground and each of the Blower Motor Driver circuits.
Is the resistance below 10K ohms on any of the circuits?

All

Yes

→ Repair all Blower Motor Driver circuits with a resistance below

10K ohms for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 2

2

Turn the ignition off.
Ensure that the Front Blower Motor Resistor Block C1 harness connector is
connected to the Front Blower Motor Resistor Block.
Disconnect 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.
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 Blower Motor
Driver circuits (cavities 2, 3, 5, 9, and 10).
Does the test light illuminate brightly on each circuit?

All

Yes

→ Go To 3

No

→ Go To 5

3

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.
Disconnect the Front Blower Motor Resistor Block C1 harness connector.
Turn the ignition on.
Measure the voltage of each of the Blower Motor Driver circuits (cavities 2, 3, 5, 9,
and 10) in the A/C - Heater Control Module C2 harness connector.
Is there any voltage present?

All

Yes

→ Repair all Blower Motor Driver circuits with voltage present for a

short to voltage.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 4

573

HEATING & A/C

TEST

ACTION

APPLICABILITY

4

Turn the ignition off.
Disconnect the A/C - Heater Control Module C2 harness connector.
Disconnect the Front Blower Motor Resistor Block C1 harness connector.
Measure the resistance between the Blower Motor Low Driver circuit and the M1,
M2, M3 and Blower Motor High Driver circuits.
Measure the resistance between the Blower Motor M1 Driver circuit and the M2, M3,
and Blower Motor High Driver circuits.
Measure the resistance between the Blower Motor M2 Driver circuit and the M3 and
Blower Motor High Driver circuit.
Measure the resistance between the Blower Motor M3 Driver circuit and the Blower
Motor High Driver circuit.
Is the resistance below 10K ohms between any of the circuits?

All

Yes

→ Repair the shorted Blower Motor Driver circuits.

Perform BODY VERIFICATION TEST - VER 1.

No

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

Service Information.
Perform BODY VERIFICATION TEST - VER 1.

5

Turn the ignition off.
Disconnect the A/C - Heater Control Module C2 harness connector.
Disconnect the Front Blower Motor Resistor Block C1 harness connector.
Measure the resistance of each Blower Motor Driver circuit between the Front
Blower Motor Resistor Block C1 harness connector and the A/C - Heater Control
Module C2 harness connector.
Is the resistance below 5.0 ohms on each of the circuits?

All

Yes

→ Replace the Front Blower Motor Resistor Block in accordance

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

No

→ Repair all Blower Motor Driver circuits with a resistance above 5

ohms for an open.
Perform BODY VERIFICATION TEST - VER 1.

574

HEATING & A/C

*FRONT BLOWER MOTOR SPEEDS INCORRECT - MTC —

Continued