Chrysler 300M 2002 Service Manual page 2012

IN CAR TEMP SENSOR FAILURE (ATC ASPIRATOR FAILURE) —
Continued
TEST
1 Turn the ignition on.
Completely cover the aspirator inlet (below blower switch) with a piece of tissue
paper.
Note: The tissue paper should hold in place because of the air drawn in from
the aspirator.
Turn the ignition off.
Stay in the vehicle, close all doors and ensure courtesy lamps are off.
Wait three minutes. Open and close the driver door and observe the aspirator motor.
The motor should run for approximately 30 seconds after the courtesy lamps have
faded out and then stop.
Disconnect the ATC Head harness connector.
Turn the ignition on.
Measure the voltage of the In-Car Temperature Sensor Signal circuit. The voltage
should be between 4.5 volts and 5.2 volts.
Select the appropriate findings.
Aspirator never ran.
Aspirator timer inop when door opened.
In-Car Temp Sense above 5.3 volts.
In-Car Temp Sense below 4.5 volts.
None of the above.
2 Turn the ignition off.
Disconnect the ATC Head harness connector.
Turn the ignition on.
Measure the voltage of the Fused B(+) circuit.
Is the voltage above 10.0 volts?
Yes → Go To 3
→ Repair the Fused B(+) circuit for an open.
No
3 Turn the ignition off.
Disconnect the ATC Head harness connector.
Turn the ignition on.
Measure the voltage of the Aspirator Motor Driver circuit.
Is the voltage above 10.0 volts?
Yes → Repair the Aspirator Motor Driver circuit for a short to voltage. If
→ Go To 4
No
ACTION
Go To 2
Go To 6
Repair the In-Car Temperature Sensor Signal circuit for a short to
voltage. If the circuit is okay, replace the BCM.
Perform BODY VERIFICATION TEST - VER 1.
Go To 7
Go To 10
Perform BODY VERIFICATION TEST - VER 1.
the circuit is okay, replace the BCM.
Perform BODY VERIFICATION TEST - VER 1.
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HEATING & A/C
APPLICABILITY
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All
All