Dodge Viper SRT-10 (ZB). Manual — part 334
TEST
ACTION
APPLICABILITY
5
Start the engine.
Turn the blower control to the high speed position.
NOTE: The Mode 1 door must be at its physical end of travel in the panel
position to correctly direct airflow to the Mode 2 door.
NOTE: The Mode 2 door must be at its physical end of travel in the
floor-defrost position to correctly direct airflow to the Mode 1 door.
Turn the mode control to each door position for a minimum of 30 seconds and check
for airflow from the corresponding vents.
Does air flow from the correct vents for each door position?
All
Yes
→ Test Complete.
No
→ Remove door actuators from A/C-Heater Housing Assy. By hand,
attempt to rotate the door actuators in both directions. Also,
inspect for disconnected, missing, or broken door actuator link-
age. Repair as necessary in accordance with the Service Informa-
tion.
Perform BODY VERIFICATION TEST - VER 1.
6
Start the engine.
Turn the blower control to the high speed position.
Turn the mode control to the panel position.
Turn the blend control to the full hot position.
Turn the blend control to the full cold position, in 25% increments, while checking for
a change in airflow air temperature coming from the panel vents.
Does the airflow air temperature change with respect to the position of the blend
control?
All
Yes
→ Test Complete.
No
→ Remove door actuator from A/C-Heater Housing Assy. By hand,
attempt to rotate the door actuator in both directions. Also,
inspect for disconnected, missing, or broken door actuator link-
age. Repair as necessary in accordance with the Service Informa-
tion.
Perform BODY VERIFICATION TEST - VER 1.
7
Start the engine.
Turn the blower control to the high speed position.
Turn the mode control to the panel position.
Turn the mode control to the MAX panel position. The sound of the air flowing
through the ducts should get louder as the recirculation door opens to bring in recirc
air.
Does the sound of the airflow get louder after turning the control to the MAX panel
position?
All
Yes
→ Test Complete.
No
→ Remove door actuator from A/C-Heater Housing Assy. By hand,
attempt to rotate the door actuator in both directions. Also,
inspect for disconnected, missing, or broken door actuator link-
age. Repair as necessary in accordance with the Service Informa-
tion.
Perform BODY VERIFICATION TEST - VER 1.
229
HEATING & A/C
*BLEND/MODE/RECIRC DOOR OPERATION IMPROPER —
Continued
Symptom:
*BLOWER MOTOR INOPERATIVE
POSSIBLE CAUSES
POWER DISTRIBUTION CENTER FUSE #1
BLOWER MOTOR RELAY SHORTED TO GROUND
BLOWER MOTOR RELAY OUTPUT CIRCUIT SHORTED TO GROUND
BLOWER MOTOR SHORTED TO GROUND
BLOWER MOTOR HIGH DRIVER CIRCUIT OPEN
GROUND CIRCUIT OPEN
A/C - HEATER CONTROL MODULE OPEN
CHECKING BLOWER MOTOR RELAY AND RELAY CIRCUITS
BLOWER MOTOR HIGH DRIVER CIRCUIT OPEN
BLOWER MOTOR
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Remove and inspect Power Distribution Center Fuse #1.
Is the fuse open?
All
Yes
→ Go To 2
No
→ Go To 5
2
Turn the ignition off.
Replace the Power Distribution Center Fuse #1.
Turn the ignition on.
Turn the blower on and operate it in all speeds and modes.
Does the blower motor operate properly without blowing the fuse?
All
Yes
→ Check the Blower Motor Relay Output circuit for an intermittent
short to ground. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off.
Remove Blower Motor Relay from the Power Distribution Center.
Measure the resistance between the Blower Motor Relay terminal 29 and terminal
28.
Measure the resistance between the Blower Motor Relay terminal 29 and terminal
26.
Is the resistance below 10K ohms?
All
Yes
→ Replace the Blower Motor Relay and fuse in accordance with
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
230
HEATING & A/C
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the Blower Motor harness connector.
Measure the resistance between ground and the Blower Motor Relay Output circuit.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Blower Motor Relay Output circuit for a short to
ground and replace the fuse.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Blower Motor and fuse in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Ensure Power Distribution Center Fuse #1 is installed.
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 connect to ground, back probe the Blower Motor High
Driver circuit in the Blower Motor harness connector.
Does the test light illuminate brightly?
All
Yes
→ Go To 6
No
→ Go To 8
6
Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
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, back probe the Blower Motor High
Driver circuit in the A/C - Heater Control Module C1 harness connector.
Does the test light illuminate brightly?
All
Yes
→ Go To 7
No
→ Repair the Blower Motor High Driver circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
7
Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Measure the resistance between ground and the Ground circuit.
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.
8
Perform the Blower Motor Relay, Relay Test and Relay Circuit Test. Refer to
Diagnosis and Testing Under Heating and Air Conditioning in the Service Manual.
Do the relay and circuits test Ok?
All
Yes
→ Go To 9
No
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
231
HEATING & A/C
*BLOWER MOTOR INOPERATIVE —
Continued
TEST
ACTION
APPLICABILITY
9
Turn the ignition off.
Disconnect the Blower Motor harness connector.
Disconnect the A/C - Heater Control Module C1 harness connector.
Measure the resistance of the Blower Motor High Driver circuit between the Blower
Motor harness connector and the A/C - Heater Control Module C1 harness connector.
Is the resistance below 5 ohms?
All
Yes
→ Replace the Blower Motor in accordance with the Service Infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Blower Motor High Driver circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
232
HEATING & A/C
*BLOWER MOTOR INOPERATIVE —
Continued
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