DTC P0505: IAC MOTOR CIRCUIT Jeep Cherokee II рестайлинг

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For circuit identification and wiring diagram, see CHEROKEE wiring diagram in WIRING DIAGRAMS article.

Note. DTC P0505: IAC MOTOR CIRCUIT is monitored immediately after ignition is turned on with battery voltage more than 11.5 volts. DTC may be stored in Powertrain Control Module (PCM) if PCM senses a short to ground or battery voltage on any of 4 IAC driver circuits for 2.75 seconds while IAC motor is active. Possible causes are: defective IAC motor, defective PCM, defective connector or defective wiring.

1. Turn ignition off for 10 seconds. Start engine and allow it to idle for 20 seconds. If engine will not idle, hold throttle open slightly to keep engine running. Using scan tool, actuate IAC motor to 1400 RPM. Release throttle. If engine speed is 1300-1500 RPM, go to next step. If engine speed is not 1300-1500 RPM, go to step 30).
2. Turn ignition off for 10 seconds. Start engine and allow it to idle for 20 seconds. If engine will not idle, hold throttle open slightly to keep engine running. Using scan tool, actuate IAC motor to 900 RPM. If engine speed is 800-1000 RPM, go to next step. If engine speed is not 800-1000 RPM, go to step 30).
3. Ensure engine is still idling. Using scan tool, go to SYSTEM TESTS and select IAC WIGGLE TEST. If idle speed does not raise and lower, go to step 6). If idle speed raises and lowers, go to next step.
4. Turn engine off. Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. Perform TEST VER-5A. If connectors and wiring harness are okay, go to next step.
5. Start engine and allow it to idle. Using scan tool, go to SYSTEM TESTS and select IAC WIGGLE TEST. While monitoring IAC motor operation, wiggle wiring harness from IAC motor to PCM. If IAC motor stops operating at any time while wiggling wiring harness, repair wiring harness where wiggling caused IAC motor to stop operating. Perform TEST VER-5A. If IAC motor does not stop operating at any time while wiggling wiring harness, test is complete.
6. Turn engine off. Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. Perform TEST VER-5A. If connectors and wiring harness are okay, go to next step.
7. Disconnect IAC motor connector. IAC motor is located on throttle body. Start engine and allow it to idle. Using a voltmeter, check voltage on IAC motor connector, driver No. 1 circuit (Gray/Red wire). If voltage goes to more than 5 volts at any time, go to next step. If voltage does not go to more than 5 volts at any time, go to step 27).
8. Turn ignition off. Ensure IAC motor connector is still disconnected. Disconnect PCM connectors. PCM is located in engine compartment. See PCM LOCATION table under SYSTEM DIAGNOSTICS. Clean and/or repair connectors as necessary. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 1 circuit (Gray/Red wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 1 circuit for short to ground. Perform TEST VER-5A.
9. Start engine and allow it to idle. Ensure IAC motor and PCM connectors are still disconnected. Using a voltmeter, check voltage on IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If voltage goes to more than 5 volts at any time, go to next step. If voltage does not go to more than 5 volts at any time, go to step 24).
10. Ensure engine is still idling. Ensure IAC motor and PCM connectors are still disconnected. Using voltmeter, check voltage on IAC motor connector, driver No. 3 circuit (Brown/White wire). If voltage goes to more than 5 volts at any time, go to next step. If voltage does not go to more than 5 volts at any time, go to step 21).
11. Turn engine off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 4 circuit (Violet/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 4 circuit for short to ground. Perform TEST VER-5A.
12. Start engine and allow it to idle. Ensure IAC motor and PCM connectors are still disconnected. Using a voltmeter, check voltage on IAC motor connector, driver No. 4 circuit (Violet/Black wire). If voltage goes to more than 5 volts at any time, go to next step. If voltage does not go to more than 5 volts at any time, go to step 18).
13. Turn engine off. Ensure IAC motor and PCM connectors are still disconnected. Visually inspect connectors for corroded, damaged, pushed-out or miswired terminals. Repair connectors as necessary. Perform TEST VER-5A. If connectors are okay, go to next step.
14. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 2 circuit for short to ground. Perform TEST VER-5A.
15. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between IAC motor connector, driver No. 1 circuit (Gray/Red wire) and each remaining driver circuit. If resistance is 5 ohms or more between all circuits, go to next step. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together. Perform TEST VER-5A.
16. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 3 circuit (Brown/White wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 3 circuit for short to ground. Perform TEST VER-5A.
17. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between IAC motor connector, driver No. 2 circuit (Yellow/Black wire), and driver No. 3 (Brown/White wire) and driver No. 4 (Violet/Black wire) circuits. If resistance is 5 ohms or more between all circuits, go to step 41). If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together. Perform TEST VER-5A.
18. Turn engine off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 2 circuit for short to ground. Perform TEST VER-5A.
19. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance of IAC motor connector, driver No. 4 circuit (Violet/Black wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open driver No. 4 circuit. Perform TEST VER-5A.
20. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Visually inspect connectors for corroded, damaged, pushed-out or miswired terminals. Repair connectors as necessary. Perform TEST VER-5A. If connectors are okay, go to step 47).
21. Turn engine off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 4 circuit (Violet/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 4 circuit for short to ground. Perform TEST VER-5A.
22. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 3 circuit (Brown/White wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 3 circuit for short to ground. Perform TEST VER-5A.
23. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Visually inspect connectors for corroded, damaged, pushed-out or miswired terminals. Repair connectors as necessary. Perform TEST VER-5A. If connectors are okay, go to step 53).
24. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 4 circuit (Violet/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 4 circuit for short to ground. Perform TEST VER-5A.
25. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance of IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open driver No. 2 circuit. Perform TEST VER-5A.
26. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Visually inspect connectors for corroded, damaged, pushed-out or miswired terminals. Repair connectors as necessary. Perform TEST VER-5A. If connectors are okay, go to step 60).
27. Turn engine off. Ensure IAC motor is still disconnected. Disconnect PCM connectors. PCM is located in engine compartment. See PCM LOCATION table under SYSTEM DIAGNOSTICS. Clean and/or repair connectors as necessary. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 1 circuit (Gray/Red wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 1 circuit for short to ground. Perform TEST VER-5A.
28. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance of IAC motor connector, driver No. 1 circuit (Gray/Red wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open driver No. 1 circuit. Perform TEST VER-5A.
29. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Visually inspect connectors for corroded, damaged, pushed-out or miswired terminals. Repair connectors as necessary. Perform TEST VER-5A. If connectors are okay, go to step 66).
30. Ensure engine is still idling. Disconnect IAC motor connector. IAC motor is located on throttle body. Clean and/or repair connector as necessary. Using a voltmeter, check voltage on IAC motor connector, driver No. 1 circuit (Gray/Red wire). If voltage goes to more than 5 volts at any time, go to next step. If voltage does not go to more than 5 volts at any time, go to step 63).
31. Ensure engine is still idling. Ensure IAC motor and PCM connectors are still disconnected. Using a voltmeter, check voltage on IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If voltage goes to more than 5 volts at any time, go to next step. If voltage does not go to more than 5 volts at any time, go to step 56).
32. Ensure engine is still idling. Ensure IAC motor and PCM connectors are still disconnected. Using voltmeter, check voltage on IAC motor connector, driver No. 3 circuit (Brown/White wire). If voltage goes to more than 5 volts at any time, go to next step. If voltage does not go to more than 5 volts at any time, go to step 49).
33. Turn engine off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 1 circuit (Gray/Red wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 1 circuit for short to ground. Perform TEST VER-5A.
34. Start engine and allow it to idle. Ensure IAC motor and PCM connectors are still disconnected. Using a voltmeter, check voltage on IAC motor connector, driver No. 4 circuit (Violet/Black wire). If voltage goes to more than 5 volts at any time, go to next step. If voltage does not go to more than 5 volts at any time, go to step 43).
35. Turn engine off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 4 circuit (Violet/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 4 circuit for short to ground. Perform TEST VER-5A.
36. Ensure ignition is off. Ensure PCM connectors are still disconnected. Visually inspect PCM connectors for corroded, damaged, pushed-out or miswired terminals. Repair connectors as necessary. Perform TEST VER-5A. If connectors are okay, go to next step.
37. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 2 circuit for short to ground. Perform TEST VER-5A.
38. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between IAC motor connector, driver No. 1 circuit (Gray/Red wire) and each remaining driver circuit. If resistance is 5 ohms or more between all circuits, go to next step. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together. Perform TEST VER-5A.
39. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between IAC motor connector, driver No. 2 circuit (Yellow/Black wire), and driver No. 3 (Brown/White wire) and driver No. 4 (Violet/Black wire) circuits. If resistance is 5 ohms or more between all circuits, go to next step. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together. Perform TEST VER-5A.
40. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 3 circuit (Brown/White wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 3 circuit for short to ground. Perform TEST VER-5A.
41. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between IAC motor connector, driver No. 3 circuit (Brown/White wire) and driver No. 4 circuit (Violet/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 3 circuit for short to driver No. 4 circuit. Perform TEST VER-5A.
42. At this time, IAC motor is assumed to be defective. Replace IAC motor. Perform TEST VER-5A.
43. Turn engine off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance of IAC motor connector, driver No. 4 circuit (Violet/Black wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open driver No. 4 circuit. Perform TEST VER-5A.
44. Ensure ignition is off. Ensure PCM connectors are still disconnected. Visually inspect PCM connectors for corroded, damaged, pushed-out or miswired terminals. Repair connectors as necessary. Perform TEST VER-5A. If connectors are okay, go to next step.
45. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 4 circuit (Violet/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 4 circuit for short to ground. Perform TEST VER-5A.
46. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 2 circuit for short to ground. Perform TEST VER-5A.
47. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 3 circuit (Brown/White wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 3 circuit for short to ground. Perform TEST VER-5A.
48. At this time, PCM is assumed to be defective. Replace PCM. Perform TEST VER-5A.
49. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 1 circuit (Gray/Red wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 1 circuit for short to ground. Perform TEST VER-5A.
50. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance of IAC motor connector, driver No. 3 circuit (Brown/White wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open driver No. 3 circuit. Perform TEST VER-5A.
51. Ensure ignition is off. Ensure PCM connectors are still disconnected. Visually inspect PCM connectors for corroded, damaged, pushed-out or miswired terminals. Repair connectors as necessary. Perform TEST VER-5A. If connectors are okay, go to next step.
52. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 4 circuit (Violet/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 4 circuit for short to ground. Perform TEST VER-5A.
53. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 2 circuit for short to ground. Perform TEST VER-5A.
54. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 3 circuit (Brown/White wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 3 circuit for short to ground. Perform TEST VER-5A.
55. At this time, PCM is assumed to be defective. Replace PCM. Perform TEST VER-5A.
56. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 1 circuit (Gray/Red wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 1 circuit for short to ground. Perform TEST VER-5A.
57. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance of IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open driver No. 2 circuit. Perform TEST VER-5A.
58. Ensure ignition is off. Ensure PCM connectors are still disconnected. Visually inspect PCM connectors for corroded, damaged, pushed-out or miswired terminals. Repair connectors as necessary. Perform TEST VER-5A. If connectors are okay, go to next step.
59. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 4 circuit (Violet/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 4 circuit for short to ground. Perform TEST VER-5A.
60. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 2 circuit for short to ground. Perform TEST VER-5A.
61. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 3 circuit (Brown/White wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 3 circuit for short to ground. Perform TEST VER-5A.
62. At this time, PCM is assumed to be defective. Replace PCM. Perform TEST VER-5A.
63. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance of IAC motor connector, driver No. 1 circuit (Gray/Red wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open driver No. 1 circuit. Perform TEST VER-5A.
64. Ensure ignition is off. Ensure PCM connectors are still disconnected. Visually inspect PCM connectors for corroded, damaged, pushed-out or miswired terminals. Repair connectors as necessary. Perform TEST VER-5A. If connectors are okay, go to next step.
65. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and IAC motor connector, driver No. 1 circuit (Gray/Red wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 1 circuit for short to ground. Perform TEST VER-5A.
66. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 4 circuit (Violet/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 4 circuit for short to ground. Perform TEST VER-5A.
67. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 2 circuit for short to ground. Perform TEST VER-5A.
68. Ensure ignition is off. Ensure IAC motor and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and IAC motor connector, driver No. 3 circuit (Brown/White wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair driver No. 3 circuit for short to ground. Perform TEST VER-5A.
69. At this time, PCM is assumed to be defective. Replace PCM. Perform TEST VER-5A.