Chrysler RG Voyager. Manual — part 184
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Rotate the Panel Lamps Dimmer switch to the off position.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Turn the Headlamp switch 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
→ Go To 5
No
→ Go To 6
5
Turn the Headlamp switch off.
Turn the ignition off.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the resistance of the Ground circuit between the Rear Blower Rear Control
switch C2 harness connector and ground.
Is the resistance below 5 ohms?
All
Yes
→ Replace the Rear Blower Rear Control Switch in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
6
Turn the ignition off.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Disconnect the Body Control Module C3 harness connector.
Measure the resistance of the Panel Lamps Driver circuit between the Rear Blower
Rear Control Switch C2 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.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Panel Lamps Driver circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
705
HEATING & A/C
*REAR A/C - HEATER CONTROL ILLUMINATION INOPERATIVE - MTC
—
Continued
Symptom:
*REAR BLOWER MOTOR INOPERATIVE - MTC
POSSIBLE CAUSES
FRONT CONTROL MODULE (FCM) DTC(S) PRESENT
IPM FUSE #12
FUSED REAR BLOWER MOTOR RELAY OUTPUT CIRCUIT SHORTED TO GROUND
BLOWER MOTOR
GROUND CIRCUIT OPEN
A/C - HEATER CONTROL MODULE
CHECK FOR POWER TO REAR BLOWER MOTOR
BLOWER MOTOR
REAR BLOWER HIGH SPEED CIRCUIT OPEN
REAR BLOWER MOTOR HIGH CIRCUIT OPEN
REAR BLOWER MOTOR RESISTOR BLOCK
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 Front Control Module, 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.
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 5
706
HEATING & A/C
TEST
ACTION
APPLICABILITY
3
Replace IPM Fuse #12.
Turn the ignition on.
On RG vehicles, press the A/C - Heater Control power switch on.
Turn the rear blower on and operate it in all speeds and modes.
Does the blower motor operate properly without blowing the fuse?
All
Yes
→ Check the Fused Rear Blower Motor Relay Output circuit for an
intermittent short to ground. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the Rear Blower Motor 2-pin harness connector.
Measure the resistance between ground and the Fused Rear Blower Motor Relay
Output circuit.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Fused Rear Blower Motor Relay Output circuit for a
short to ground. Replace IPM Fuse #12.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Rear Blower Motor in accordance with the Service
Information. Replace IPM Fuse #12
Perform BODY VERIFICATION TEST - VER 1.
5
Ensure IPM Fuse #12 is installed.
Disconnect the Rear Blower Front Control Switch harness connector.
Turn the ignition on.
On RG vehicles, press the A/C - Heater Control power switch 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 Rear Blower Motor
High circuit in the Rear Blower Front Control Switch harness connector.
Does the test light illuminate brightly?
All
Yes
→ Go To 6
No
→ Go To 7
6
Turn the ignition off.
Disconnect the Rear Blower Front Control Switch harness connector.
Measure the resistance of the Ground circuit between the Rear Blower Front Control
Switch harness connector and ground.
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 Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
707
HEATING & A/C
*REAR BLOWER MOTOR INOPERATIVE - MTC —
Continued
TEST
ACTION
APPLICABILITY
7
Turn the ignition on.
On RG vehicles, press the A/C - Heater Control power switch 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 Rear Blower
Motor Relay Output circuit in the Rear Blower Motor 2-pin harness connector.
Does the test light illuminate brightly?
All
Yes
→ Go To 8
No
→ Go To 11
8
On RG vehicles, press the A/C - Heater Control power switch off.
Turn the ignition off.
Using a jumper wire connected to ground, back probe the DB/OR wire in the Rear
Blower Motor 2-pin harness connector.
Turn the ignition on.
On RG vehicles, press the A/C - Heater Control power switch on.
Does the blower motor run at high speed?
All
Yes
→ Go To 9
No
→ Replace the Rear Blower Motor in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
9
Turn the ignition off.
Disconnect the Rear Blower Motor 2-pin harness connector.
Disconnect the Rear Blower Motor Resistor Block harness connector.
Measure the resistance of the DB/OR wire between the Rear Blower Motor 2-pin
harness connector and the Rear Blower Motor Resistor Block harness connector.
Is the resistance below 5 ohms?
All
Yes
→ Go To 10
No
→ Repair the DB/OR wire between the Rear Blower Motor 2-pin
harness connector and the Rear Blower Motor Resistor Block
harness connector for an open.
Perform BODY VERIFICATION TEST - VER 1.
10
Turn the ignition off.
Disconnect the Rear Blower Motor Resistor Block harness connector.
Disconnect the Rear Blower Front Control Switch harness connector.
Measure the resistance of the Rear Blower Motor High circuit between the Rear
Blower Motor Resistor Block harness connector and the Rear Blower Front Control
Switch harness connector.
Is the resistance below 5 ohms?
All
Yes
→ Replace the Rear Blower Motor Resistor Block in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Rear Blower Motor High circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
708
HEATING & A/C
*REAR BLOWER MOTOR INOPERATIVE - MTC —
Continued
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