Neon L4-2.0L VIN C (1997)
Idle Speed/Throttle Actuator - Electronic: Description and Operation
THEORY OF OPERATION:
The idle air control (IAC) motor is used by the Powertrain Control Module (PCM) to help regulate idle speed. The motor controls the amount of
air allowed to bypass the throttle blade. The PCM controls the motor using four driver circuits to position the stepper motor.
CIRCUIT OPERATION
The Powertrain Control Module (PCM) operates the Idle Air Control (IAC) motor through 4 circuits K39, K40, K59, and K60. Each circuit
connects to separate cavities in the PCM connector.
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Circuit K39 connects to cavity 57 of the PCM connector.
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Circuit K40 connects to cavity 48 of the PCM connector.
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Circuit K59 connects to cavity 58 of the PCM connector.
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Circuit K60 connects to cavity 49 of the PCM connector.
