Chrysler Concorde 2004 Service Manual page 871

Symptom:
P0508-IAC VALVE SENSE CIRCUIT LOW
When Monitored and Set Condition:
P0508-IAC VALVE SENSE CIRCUIT LOW
When Monitored: Engine running. Battery voltage greater than 10 volts.
Set Condition: The IAC sense circuit is less than 175 mA. One Trip Fault.
IAC MOTOR OPERATION
IAC MOTOR
(K39) IAC MOTOR CONTROL CIRCUIT SHORTED TO GROUND
(K60) IAC SIGNAL CIRCUIT OPEN
(K60) IAC SIGNAL CIRCUIT SHORTED TO GROUND
(K39) IAC MOTOR CONTROL CIRCUIT OPEN
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 below 146 mA?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION symptom in the
No
2 Turn the ignition off.
Disconnect the IAC Motor harness connector.
Remove the IAC Motor.
NOTE: Inspect the IAC air passages for restriction and damage to the IAC
valve.
Measure the resistance across the IAC Motor pin terminals (component).
Is the resistance 9.7 +/- 1.0 ohms?
Yes → Go To 3
→ Replace the IAC Motor.
No
POSSIBLE CAUSES
ACTION
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
DRIVEABILITY - NGC
213
APPLICABILITY
All
All