Chrysler Concorde 2004 Service Manual page 311

IN CAR TEMP SENSOR FAILURE (ATC ASPIRATOR FAILURE) —
Continued
TEST
8 Turn the ignition off.
Disconnect the Body Control Module C1 & C2 harness connectors.
Disconnect the ATC Head harness connector.
Measure the resistance between the Sensor Ground circuit and the In-Car Temper-
ature Sensor Signal circuit in the ATC Head connector.
Is the resistance below 5.0 ohms?
Yes → Repair the In-Car Temperature Sensor Signal circuit for a short to
→ Go To 9
No
9 Turn the ignition off.
Disconnect the Body Control Module C2 harness connector.
Disconnect the ATC Head harness connector.
Backprobe one voltmeter lead to the In-Car Temperature Sensor Signal ckt in the
BCM C2 connector and the other lead to ground.
Reconnect the BCM harness connectors.
Turn the ignition on and observe the voltmeter.
Did the voltage go above 4.5 volts?
Yes → Repair the In-Car Temperature Sensor Signal circuit for an open.
→ Replace the Body Control Module.
No
10 Turn the ignition off.
Disconnect the ATC Head harness connector.
Close the driver door latch and ensure all lights are off.
Wait one minute to allow the BCM to go to sleep.
Measure the resistance between ground and the Sensor Ground circuit.
Is the resistance below 10.0 ohms?
Yes → Go To 11
→ Go To 12
No
11 Ensure the ATC Head is connected at this time.
With the DRBIII , erase Body Computer DTC's.
Turn the ignition on.
With the DRBIII , read Body Computer DTC's.
Does the DRBIII display In-Car Temp Sensor Failure DTC?
Yes → Replace the Automatic Temperature Control Head.
→ There is no problem found at this time. The aspirator and in-car
No
ACTION
the Sensor Ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
temp sensor should be fully operational. Refer to the wiring
diagrams located in the service information to help isolate a
possible intermittent wiring problem.
Perform BODY VERIFICATION TEST - VER 1.
295
HEATING & A/C
APPLICABILITY
All
All
All
All