Chrysler 300M 2002 Service Manual page 2641

DRIVEABILITY - NGC
Symptom:
P0509-IAC VALVE SENSE CIRCUIT HIGH
When Monitored and Set Condition:
P0509-IAC VALVE SENSE CIRCUIT HIGH
When Monitored: Engine running. Battery voltage greater than 10 volts.
Set Condition: The IAC sense circuit is greater than 980 mA. One Trip Fault.
INTERMITTENT CONDITION
IAC MOTOR
IAC MOTOR SENSE CIRCUIT SHORTED TO VOLTAGE
IAC MOTOR DRIVER CIRCUIT SHORTED TO VOLTAGE
IAC MOTOR SENSE CIRCUIT SHORTED TO IAC MOTOR DRIVER CIRCUIT
PCM
TEST
1 NOTE: If the engine will not idle, maintain an engine speed between 800 and
1500 RPM.
Start the engine.
Allow the engine to idle.
With the DRBIII , read the IAC Current.
Is the IAC Current above 999 mA?
Yes → Go To 2
No
2 Turn the ignition off.
Disconnect the IAC Motor harness connector.
With the DRBIII , monitor the IAC Current.
Turn the ignition on.
Does the DRBIII display IAC Current at 0mA?
Yes → Replace the IAC Motor.
No
3 Turn the ignition off.
Disconnect the IAC Motor harness connector.
Turn the ignition on.
With the DRBIII , actuate the ASD Relay.
Measure the voltage of the IAC Motor Sense circuit in the IAC Motor harness
connector.
Is the voltage above 0.5 of a volt?
Yes → Repair the short to voltage in the IAC Motor Sense circuit.
No
POSSIBLE CAUSES
ACTION
→ Go To 7
Perform POWERTRAIN VERIFICATION TEST VER - 5.
→ Go To 3
Perform POWERTRAIN VERIFICATION TEST VER - 5.
→ Go To 4
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APPLICABILITY
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All
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