Chrysler 300M 2002 Service Manual page 2013

HEATING & A/C
IN CAR TEMP SENSOR FAILURE (ATC ASPIRATOR FAILURE) —
Continued
TEST
4 Turn the ignition off.
Disconnect the ATC Head harness connector.
Disconnect the Body Control Module C2 harness connector.
Measure the resistance of the Aspirator Motor Driver circuit between the BCM C2
connector and the ATC Head connector.
Is the resistance below 5.0 ohms?
Yes → Go To 5
→ Repair the Aspirator Motor Driver circuit for an open.
No
5 Ensure the ATC Head is connected at this time.
Disconnect the Body Control Module C2 harness connector.
Connect a jumper wire between the Aspirator Motor Driver circuit and ground.
Check the operation of the aspirator motor fan.
Is the aspirator motor running?
Yes → Replace the Body Control Module.
→ Replace the Automatic Temperature Control Head.
No
6 Note: Ensure the courtesy lamps operate properly from the drivers door
before proceeding. If not, refer to the Interior Lighting category for the
related symptom(s).
Note: This path is for the aspirator continuing to run with the key off and
the doors closed.
Disconnect the Body Control Module C2 harness connector.
Did the aspirator motor stop running?
Yes → Replace the Body Control Module (aspirator motor driver ground-
→ Repair the Aspirator Motor Driver circuit for a short to ground.
No
7 Turn the ignition off.
Disconnect the Body Control Module C2 harness connector.
Disconnect the ATC Head harness connector.
Measure the resistance between ground and the In-Car Temperature Sensor Signal
circuit.
Is the resistance below 5.0 ohms?
Yes → Repair the In-Car Temperature Sensor Signal circuit for a short to
→ Go To 8
No
ACTION
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
ed).
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
ground.
Perform BODY VERIFICATION TEST - VER 1.
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APPLICABILITY
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