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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. POSSIBLE CAUSES IAC MOTOR OPERATION IAC MOTOR (K61) IAC MOTOR CONTROL CIRCUIT SHORTED TO GROUND (K961) IAC RETURN CIRCUIT OPEN (K961) IAC RETURN CIRCUIT SHORTED TO GROUND (K61) IAC MOTOR CONTROL CIRCUIT OPEN PCM TEST ACTION APPLICABILITY 1 NOTE: If the engine will not idle, maintain an engine speed between 800 and t, read the IAC Current. Is the IAC Current below 146 mA? All Yes → Go To 2 No → Refer to the INTERMITTENT CONDITION symptom in the Driveability category. 2 Turn the ignition off. All Yes → Go To 3 No → Replace the IAC Motor. Perform POWERTRAIN VERIFICATION TEST VER - 5. 2005 CS POWERTRAIN 201 DRIVEABILITY - NGC |