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Test NTC-8: Checking IAC Motor

NOTE: Possible causes are: Idle Air Control (IAC) motor connector defective, IAC defective or engine vacuum leaks.
  1. Start engine and idle. Using scan tool, actuate Idle Air Control (IAC) motor to 1400 RPM. Engine speed should be 1300-1500 RPM. If engine speed is within specification, stop actuation. Test is complete. If engine speed is not within specification, go to next step.
  2. Turn ignition off. Inspect engine for vacuum leaks. If vacuum leaks are not present, go to next step. If vacuum leaks are present, repair as necessary. Perform TEST VER-2A: ROAD TEST FOR NON-OBD II  .
  3. Disconnect IAC motor connector. Inspect electrical connector and clean/repair as necessary. Inspect wiring and connectors for damage. If wiring and connectors are okay, test is complete. If wiring and connectors are not okay, repair or replace as necessary. Perform TEST VER-2A: ROAD TEST FOR NON-OBD II  .
  4. If no other potential causes are remaining, IAC motor is assumed to be defective. Replace IAC motor. Perform TEST VER-2A: ROAD TEST FOR NON-OBD II  .
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