Page 283 of 4284

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
AT C
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
Ye s®Return to the symptom list and choose the symptom.
With the DRBIIIt, reset the ATC after repair/replacement 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
Ye s®Replace the Mode Door Actuator.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
254
AUTOMATIC TEMPERATURE CONTROL
Page 284 of 4284
TEST ACTION APPLICABILITY
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
Ye s®Repair or replace the mode door/linkage as necessary.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
255
AUTOMATIC TEMPERATURE CONTROL
FRONT MODE DOOR TRAVEL TOO LARGE (ACTIVE) ÐContinued
Page 285 of 4284

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
AT C
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
Ye s®Return to the symptom list and choose the symptom.
With the DRBIIIt, reset the ATC after repair/replacement 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 in each position.
Note: Observe test light for approximately 30 seconds.
Does the test light start to flash and stay flashing?All
Ye s®Go To 3
No®Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
256
AUTOMATIC TEMPERATURE CONTROL
Page 286 of 4284
TEST ACTION APPLICABILITY
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
Ye s®Replace the Mode Door Actuator.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair or replace the mode door as necessary.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
257
AUTOMATIC TEMPERATURE CONTROL
FRONT MODE DOOR TRAVEL TOO SMALL (ACTIVE) ÐContinued
Page 290 of 4284

Symptom:
PASS BLEND DOOR NOT RESPONDING (ACTIVE)
When Monitored and Set Condition:
PASS BLEND 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
PASSENGER BLEND DOOR DRIVER CIRCUIT (A) SHORTED TO GROUND
PASSENGER BLEND DOOR DRIVER CIRCUIT (B) SHORTED TO GROUND
PASSENGER BLEND DOOR DRIVER CIRCUITS (A) AND (B) SHORTED TOGETHER
PASSENGER BLEND DOOR DRIVER CIRCUIT (A) OPEN
PASSENGER BLEND DOOR DRIVER CIRCUIT (B) OPEN
AT C
PASSENGER BLEND DOOR ACTUATOR
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Passenger Blend Door Driver (A)
circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 2
No®Repair the Passenger Blend Door Driver (A) circuit for a short to
ground.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Passenger Blend Door Driver (B)
circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 3
No®Repair the Passenger Blend Door Driver (B) circuit for a short to
ground.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
261
AUTOMATIC TEMPERATURE CONTROL
Page 291 of 4284

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Passenger Blend Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between the Passenger Blend Door Driver (A) and (B)
circuits.
Is the resistance above 100k ohms?All
Ye s®Go To 4
No®Repair the Passenger Blend Door Driver (A) and (B) circuits for a
short together.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the Passenger Blend Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance of the Passenger Blend Door Driver (A) circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 5
No®Repair the Passenger Blend Door Driver (A) circuit for an open.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
5 Turn the ignition off.
Disconnect the Passenger Blend Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance of the Passenger Blend Door Driver (B) circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 6
No®Repair the Passenger Blend Door Driver (B) circuit for an open.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between the Passenger Blend Door Driver (A) and (B)
circuits.
Is the resistance between 26.0 and 46.0 ohms?All
Ye s®Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement 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 Passenger Blend Door Actuator.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
262
AUTOMATIC TEMPERATURE CONTROL
PASS BLEND DOOR NOT RESPONDING (ACTIVE) ÐContinued
Page 292 of 4284

Symptom:
PASS BLEND DOOR TRAVEL TOO LARGE (ACTIVE)
When Monitored and Set Condition:
PASS BLEND 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
PASSENGER BLEND DOOR ACTUATOR
PASSENGER BLEND DOOR LINKAGE
AT C
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, read the active ATC DTCs.
Is the PASSENGER BLEND DOOR NOT RESPONDING DTC set?All
Ye s®Return to the symptom list and choose the symptom.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Turn the ignition off.
Remove the Passenger Blend Door Actuator.
By hand, attempt to rotate the Passenger Blend Door Actuator in both directions.
Did the blend door actuator turn in either direction?All
Ye s®Replace the Passenger Blend Door Actuator.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
263
AUTOMATIC TEMPERATURE CONTROL
Page 293 of 4284
TEST ACTION APPLICABILITY
3 Remove the Passenger Blend Door Actuator. Rotate the blend door (door only). Note:
This should rotate approximately 45 degrees from stop to stop.
Inspect the blend door linkage for excessive wear or missing linkage.
Were any mechanical problems found?All
Ye s®Repair or replace the blend door/linkage as necessary.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
264
AUTOMATIC TEMPERATURE CONTROL
PASS BLEND DOOR TRAVEL TOO LARGE (ACTIVE) ÐContinued