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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0412: Secondary Air Injection (Air) Solenoid Control Circuit >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Turn ignition on, with engine off. Using scan tool, command AIR solenoid relay on and off. If relay turns on and off as commanded, go to next step. If relay does not turn on or off when commanded, go to step  5.
  3. Turn ignition off. Disconnect PCM harness connector containing relay control circuit. Turn ignition on. Install DVOM. Set DVOM to 10-amp scale. Check current from relay control circuit in PCM harness connector to ground for 2 minutes. If current draw is less than 0.75 amp (but not zero), see DIAGNOSTIC AIDS . If current draw is not as specified, go to next step.
  4. Turn ignition off. Remove AIR solenoid relay. Check resistance from relay control circuit in PCM harness connector to ground. If resistance is infinite, go to step  12. If resistance is not infinite, go to step  10.
  5. Turn ignition off. Remove AIR solenoid relay. Connect test light between relay coil terminals in relay harness connector. Turn ignition on. Using scan tool, command relay on and off. If test light turns on and off with each command, go to step  8. If test light does not turn on and off with each command, go to next step.
  6. Connect test light to ground and probe ignition feed circuit in AIR solenoid relay harness connector. If test light illuminates, go to next step. If test light does not illuminate, go to step  11.
  7. Turn ignition off. Reinstall AIR solenoid relay. Disconnect PCM harness connector containing relay control circuit. Turn ignition on. Connect a fused jumper wire between ground and PCM connector (harness side) relay control circuit. If relay operates, go to step  9. If relay does not operate, go to step  10.
  8. Check connections at AIR solenoid relay. Repair as necessary. After repairs, go to step  14. If relay connection is okay, go to step  12.
  9. Check connections at PCM. Repair as necessary. After repairs, go to step  14. If connections are okay, go to step  13.
  10. Repair faulty AIR solenoid relay control circuit. After repairs, go to step  14.
  11. Repair faulty AIR solenoid relay ignition feed circuit. After repairs, go to step  14.
  12. Replace AIR solenoid relay. After replacing relay, go to step  14.
  13. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  14. Using scan tool, select DTC, CLEAR INFO function. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter this DTC. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step  2.
  15. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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