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MODE DOOR FEEDBACK FAILURE - ATC & MTC —
TEST
3
Turn the ignition off.
Disconnect the Mode Door Actuator harness connector.
Turn the ignition on.
Measure the voltage of the 5 Volt Supply circuit between the Sensor Ground circuit
and the 5 Volt Supply circuit.
Is the voltage above 4.5 volts?
Yes → Go To 4
→ Go To 8
No
4
Turn the ignition off.
Disconnect the Body Control Module C2 harness connector.
Measure the resistance between the Mode Door Feedback Signal circuit and each of
the Door Driver circuits (Blend, Mode, Recirc, & Common).
Is the resistance below 10K ohms on any of the circuits?
Yes → Repair all door driver circuits with a resistance below 10K ohms
→ Go To 5
No
5
Turn the ignition off.
Reconnect the BCM C2 harness connector.
Disconnect the Mode Door Actuator harness connector.
While back probing, connect a test light between the Mode Door Driver circuit and
the Common Door Driver circuit in the Mode Door Actuator harness connector.
Start the engine.
With the DRBIII , select Body, Body Computer, System Tests, Actuate Mode Doors.
Select Mode Door.
While observing the test light, press and hold the DRB right arrow key for several
seconds.
While observing the test light, press and hold the DRB left arrow key for several
seconds.
Is the test light on while the right and left arrow keys are pressed?
Yes → Inspect for missing & broken actuator linkage. Check door for
→ Go To 6
No
ACTION
for a short to the Mode Door Feedback Signal circuit.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
binding & loss of full range. Inspect housing for missing or broken
stops. Repair as necessary. If linkage and door are okay, replace
Mode Door Actuator in accordance with Service Information.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
317
HEATING & A/C
Continued
APPLICABILITY
All
All
All
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