TEST
ACTION
APPLICA-
BILITY
6
Turn the ignition on.
With the DRBIII
t in Sensor Display, read the Blend Door voltage.
What voltage is present?
All
Btwn 0.07 to 4.7 volts
Go To
7
Less than 0.07 volts
Go To
13
Above 4.7 volts
Go To
21
7
Turn the ignition off.
Disconnect the Blend 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?
All
Yes
→ Go To 8
No
→ Go To 12
8
Turn the ignition off.
Disconnect the Body Control Module C2 harness connector.
Measure the resistance between the Blend 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?
All
Yes
→ Repair all door driver circuits with a resistance below 10K ohms for a
short to the Blend Door Feedback Signal circuit.
Calibration must be performed after repair/replacement is completed.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 9
9
Turn the ignition off.
Reconnect the BCM C2 harness connector.
Disconnect the Blend Door Actuator harness connector.
While back probing, connect a test light between the Blend Door Driver circuit and the
Common Door Driver circuit in the Blend Door Actuator harness connector.
Start the engine.
With the DRBIII
t, select Body, Body Computer, System Tests, Actuate Mode Doors.
Select Blend 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?
All
Yes
→ Inspect for missing & broken actuator linkage. Check door for binding
& loss of full range. Inspect housing for missing or broken stops.
Repair as necessary. If linkage and door are okay, replace Blend Door
Actuator in accordance with Service Information.
Calibration must be performed after repair/replacement is completed.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 10
2005 JR BODY
Publication No. 81-270-05112
September, 2004
281
HEATING & A/C
BLEND DOOR FEEDBACK FAILURE - ATC & MTC —
Continued