Chrysler 300M 2002 Service Manual page 2000

BLEND DOOR STALL TEST FAILURE —
TEST
16 Turn the ignition off.
Disconnect the C202 (manual A/C) or C203 (ATC) in-line connector (HVAC) located in
the center of the instrument panel above the accelerator pedal.
Disconnect the Body Control Module C2 harness connector.
Measure the resistance of the Blend Door Feedback Signal circuit between the BCM
C2 connector and the Inline connector (cavity #10).
Is the resistance below 5.0 ohms?
Yes → Go To 17
No
17 Turn the ignition off.
Disconnect the C202 (manual A/C) or C203 (ATC) in-line connector (HVAC) located in
the center of the instrument panel above the accelerator pedal.
Disconnect the Body Control Module C2 harness connector.
Disconnect the Body Control Module C1 harness connector.
Measure the resistance between the Sensor Ground circuit in the BCM C1 connector
and the Blend Door Feedback Signal circuit in the BCM C2 connector.
Is the resistance below 1000.0 ohms?
Yes → Repair the Blend Door Feedback Signal circuit for a short to the
No
18 Turn the ignition off.
Disconnect the C202 (manual A/C) or C203 (ATC) in-line connector (HVAC) located in
the center of the instrument panel above the accelerator pedal.
Reconnect the Body Control Module C1 & C2 harness connectors.
Turn the ignition on.
With the DRBIII , read the Temp Air Door voltage.
Connect a jumper wire between the Blend Door Feedback Signal circuit (cavity #10)
and the 5 volt supply circuit (cavity #6) at the in-line connector C202/3 (I/P harness
side).
Does the DRBIII display voltage at approximately 5.0 volts?
Yes → Ensure the wiring to the actuator is okay. If the wiring is okay,
No
ACTION
→ Repair the Blend Door Feedback Signal circuit for an open.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
Sensor Ground circuit.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
→ Go To 18
replace the Blend Door Actuator.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
→ Replace the Body Control Module.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
Continued
277
HEATING & A/C
APPLICABILITY
All
All
All