Chrysler Town, Dodge Caravan. Manual — part 748
Symptom:
FRONT MODE DOOR NOT RESPONDING (ACTIVE)
When Monitored and Set Condition:
FRONT MODE DOOR NOT RESPONDING (ACTIVE)
When Monitored:
With the ignition on and the IOD fuse installed.
Set Condition:
This DTC is set if the ATC does not receive feedback pulses within 5
seconds of the drive voltage being applied.
POSSIBLE CAUSES
MODE DOOR DRIVER CIRCUIT (A) SHORTED TO GROUND
MODE DOOR DRIVER CIRCUIT (B) SHORTED TO GROUND
MODE DOOR DRIVER CIRCUITS (A) AND (B) SHORTED TOGETHER
MODE DOOR DRIVER CIRCUIT (A) OPEN
MODE DOOR DRIVER CIRCUIT (B) OPEN
ATC
MODE DOOR ACTUATOR
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the Mode Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Mode Door Driver (A) circuit.
Is the resistance above 100k ohms?
All
Yes
→ Go To 2
No
→ Repair the Mode Door Driver (A) circuit for a short to ground.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Mode Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Mode Door Driver (B) circuit.
Is the resistance above 100k ohms?
All
Yes
→ Go To 3
No
→ Repair the Mode Door Driver (B) circuit for a short to ground.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
228
AUTOMATIC TEMPERATURE CONTROL
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Mode Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between the Mode Door Driver (B) circuit and the Mode Door
Driver (A) circuit.
Is the resistance above 100k ohms?
All
Yes
→ Go To 4
No
→ Repair the Mode Door Driver (A) and (B) circuits for a short
together.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the Mode Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance of the Mode Door Driver (A) circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the Mode Door Driver (A) circuit for an open.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Disconnect the Mode Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance of the Mode Door Driver (B) circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the Mode Door Driver (B) circuit for an open.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
6
Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between the Mode Door Driver (A) circuit and the Mode Door
Driver (B) circuit.
Is the resistance between 26.0 and 46.0 ohms?
All
Yes
→ Replace the ATC.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 7
7
If there are no possible causes remaining, view repair.
All
Repair
Replace the Mode Door Actuator.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
229
AUTOMATIC TEMPERATURE CONTROL
FRONT MODE DOOR NOT RESPONDING (ACTIVE) —
Continued
Symptom:
FRONT MODE DOOR TRAVEL TOO LARGE (ACTIVE)
When Monitored and Set Condition:
FRONT MODE DOOR TRAVEL TOO LARGE (ACTIVE)
When Monitored:
With the ignition on and the IOD fuse installed.
Set Condition:
This DTC is set when the ATC monitors the travel range during system
initialization and the measured range is greater than expected.
POSSIBLE CAUSES
CHECK THE ATC FOR DTCS
MODE DOOR ACTUATOR
MODE DOOR LINKAGE
ATC
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, read the active ATC DTCs.
Is the FRONT MODE DOOR NOT RESPONDING DTC set?
All
Yes
→ Return to the symptom list and choose the symptom.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition off.
Remove the Mode Door Actuator.
By hand, attempt to rotate the Mode Door Actuator in both directions.
Did the Mode Door Actuator turn in either direction?
All
Yes
→ Replace the Mode Door Actuator.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Remove the Mode Door Actuator. Rotate the mode doors (doors only). Note: These
should rotate approximately 45 degrees from stop to stop.
Inspect the mode door linkage for excessive wear or missing linkage.
Were any mechanical problems found?
All
Yes
→ Repair or replace the mode door/linkage as necessary.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the ATC.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
230
AUTOMATIC TEMPERATURE CONTROL
Symptom:
FRONT MODE DOOR TRAVEL TOO SMALL (ACTIVE)
When Monitored and Set Condition:
FRONT MODE DOOR TRAVEL TOO SMALL (ACTIVE)
When Monitored:
With the ignition on and the IOD fuse installed.
Set Condition:
This DTC is set when the ATC monitors the travel range during system
initialization and the measured range is less than expected.
POSSIBLE CAUSES
CHECK THE ATC FOR DTCS
ATC
OBSTRUCTED MODE DOOR
MODE DOOR ACTUATOR
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, read the active ATC DTCs.
Is the FRONT MODE DOOR NOT RESPONDING DTC set?
All
Yes
→ Return to the symptom list and choose the symptom.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition off.
Disconnect the Mode Door Actuator harness connector.
Connect a 12-volt Test Light between the Mode Door Actuator harness connector
cavities.
Turn the ignition on.
While monitoring the test light, turn the mode control knob to each position.
Note: Observe test light for approximately 30 seconds.
Does the test light start to flash and stay flashing?
All
Yes
→ Go To 3
No
→ Replace the ATC.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
3
Remove the Mode Door Actuator. Rotate the mode doors (doors only). Note: These
should rotate approximately 45 degrees from stop to stop.
Do the mode doors move smoothly in both directions?
All
Yes
→ Replace the Mode Door Actuator.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair or replace the mode door as necessary.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
231
AUTOMATIC TEMPERATURE CONTROL
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