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Home >> Chrysler >> 1995 >> Sebring LXi >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.5L V6 >> Test TC-25A >> Idle Air Control Motor Circuits (DTC 25)

Idle Air Control Motor Circuits (DTC 25)

NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS - 2.5L V6 article in ENGINE PERFORMANCE.
  1. Turn ignition off for 10 seconds. Start engine. Allow engine to idle for 20 seconds. Using scan tool, set engine speed to 1400 RPM. If engine speed is 1300-1500 RPM, go to next step. If engine speed is not 1300-1500 RPM, go to step 6).
  2. Using scan tool, set engine speed to 900 RPM. If engine speed is not 800-1000 RPM, go to step 6). If engine speed is 800-1000 RPM, go to next step.
  3. At this time, condition required to set trouble code is not present. IDLE AIR CONTROL MOTOR CIRCUITS trouble code sets if any of 4 wires are shorted to ground or to 12 volts for 2.75 seconds while IAC motor is active. Possible causes are: any one or more of 4 driver circuits shorted to ground, any one or more of 4 driver circuits shorted to power, any one or more of 4 driver circuits shorted together, failed PCM, or shorted IAC motor. PCM cannot detect an open driver circuit or a stuck IAC motor. Go to next step.
  4. Inspect wiring and connectors. Repair as required. Perform TEST VER-2. If wiring and connectors are okay, start engine. With engine at operating temperature, using scan tool, actuate IAC wiggle test. Wiggle IAC motor wiring harness. Observe IAC motor operation.
  5. If IAC motor stopped operating at any time, repair harness or connectors as necessary. Perform TEST VER-2 . If IAC motor did not stop operating at any time, stop IAC wiggle test. See INACTIVE TROUBLE CODE CONDITION . Test is complete. Perform TEST VER-2.
    NOTE: For test steps 6-21), see IAC DRIVER IDENTIFICATION table for IAC motor wire color identification.
  6. Turn ignition off. Disconnect IAC motor connector. Inspect IAC motor connector for damaged or pushed out terminals. Repair as necessary. Perform TEST VER-2. If wiring and connectors are okay, go to next step.
  7. Put scan tool in ohmmeter mode. Using scan tool, check resistance of IAC motor connector driver No. 1 wire. If resistance is less than 5 ohms, repair short to ground in driver No. 1 wire. Perform TEST VER-2. If resistance is more than 5 ohms, go to next step.
  8. Using scan tool, check resistance of IAC motor connector driver No. 2 wire. If resistance is less than 5 ohms, repair short to ground in driver No. 2 wire. Perform TEST VER-2. If resistance is more than 5 ohms, go to next step.
  9. Using scan tool, check resistance of IAC motor connector driver No. 3 wire. If resistance is less than 5 ohms, repair short to ground in driver No. 3 wire. Perform TEST VER-2. If resistance is more than 5 ohms, go to next step.
  10. Using scan tool, check resistance of IAC motor connector driver No. 4 wire. If resistance is less than 5 ohms, repair short to ground in driver No. 4 wire. Perform TEST VER-2 . If resistance is more than 5 ohms, go to next step.
    IAC DRIVER IDENTIFICATION

    Application Wire Color
    FJ22 Body
    Driver No. 1 Gray/Dark Blue
    Driver No. 2 Orange
    Driver No. 3 Dark Green
    Driver No. 4 Yellow/Dark Blue
    JA Body
    Driver No. 1 Brown/Gray
    Driver No. 2 Yellow/Black
    Driver No. 3 Gray/Red
    Driver No. 4 Violet/Gray
    NOTE: Voltage may switch or remain constant during steps 11)-14).
  11. Turn ignition on. Using scan tool, actuate IAC motor. Put scan tool in voltmeter mode. Using scan tool, check voltage on IAC motor connector driver No. 1 wire. If voltage is more than 5 volts at any time, go to next step. If voltage is not more than 5 volts at any time, go to TEST TC-25B.
  12. Using scan tool, check voltage on IAC motor connector driver No. 2 wire. If voltage is more than 5 volts at any time, go to next step. If voltage is not more than 5 volts at any time, go to TEST TC-25C .
  13. Using scan tool, check voltage on IAC motor connector driver No. 3 wire. If voltage is more than 5 volts at any time, go to next step. If voltage is not more than 5 volts at any time, go to TEST TC-25D .
  14. Using scan tool, check voltage on IAC motor connector driver No. 4 wire. If voltage is more than 5 volts at any time, go to next step. If voltage is not more than 5 volts at any time, go to TEST TC-25E .
  15. Turn ignition off. Disconnect PCM connector. Inspect PCM connector for damaged or pushed out terminals. Repair as necessary. Perform TEST VER-2 . If connector is okay, go to next step.
  16. Using an external ohmmeter, check resistance between the following wires at IAC motor connector. Record resistance readings.
    • IAC motor connector driver No. 1 and driver No. 2
    • IAC motor connector driver No. 1 and driver No. 3
    • IAC motor connector driver No. 1 and driver No. 4
  17. If resistance between any 2 wires was less than 5 ohms, repair those wires for shorting together. Perform TEST VER-2. If resistance between all pairs of wires was more than 5 ohms, go to next step.
  18. Using an external ohmmeter, check resistance between the following wires at IAC motor connector. Record resistance readings.
    • IAC motor connector driver No. 2 and driver No. 3
    • IAC motor connector driver No. 2 and driver No. 4
  19. If resistance between any 2 wires was less than 5 ohms, repair those wires for shorting together. Perform TEST VER-2. If resistance between all pairs of wires was more than 5 ohms, go to next step.
  20. Using an external ohmmeter, check resistance between the following wires at IAC motor connector. Record resistance readings.
    • IAC motor connector driver No. 3 and driver No. 4
  21. If resistance between wires was less than 5 ohms, repair wires for shorting together. Perform TEST VER-2 . If resistance between wires was more than 5 ohms, replace IAC motor. Perform TEST VER-2.
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