LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0418: Secondary Air Injection (Air) Pump Relay Control Circuit >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different variant/trim than selected.
  1. If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM TESTS. After performing powertrain diagnostic system check, go to next step.
  2. Locate and inspect AIR PUMP fuse (30-amp) located in top underhood fuse block. See Figure and Figure . If fuse is blown, go to next step. If fuse is okay, go to step  4.
  3. Locate and disconnect AIR solenoid connector. See Figure. Using a test light connected to battery voltage, probe AIR solenoid connector terminal "A" (Orange wire). If test light illuminates, go to step  13. If test light does not illuminate, go to next step.
  4. Turn ignition on, with engine off. Using scan tool, command AIR pump relay on and off. If AIR pump relay turns on and off with each command, go to next step. If AIR pump relay does not turn on and off with each command, go to step  6.
  5. Using scan tool, review FREEZE FRAME and/or FAILURE RECORDS data for this DTC. Turn ignition on for at least 30 seconds. Start engine. Operate vehicle within conditions for setting this DTC. If this DTC resets, go to next step. If this DTC does not reset, see DIAGNOSTIC AIDS .
  6. Turn ignition off. Remove AIR pump relay from bottom underhood fuse block. Turn ignition on. Using a test light connected to ground, probe AIR pump relay connector terminal E6. See WIRING DIAGRAMS article. If test light illuminates, go to next step. If test light does not illuminate, go to step  13.
  7. Connect test light between AIR pump relay connector terminals E6 and F8. Using scan tool, command AIR pump relay on and off. If test light turns on and off with each command, go to step  11. If test light does not turn on and off with each command, go to next step.
  8. If test light remains illuminated with each command, go to step  10. If test light does not remain illuminated with each command, go to next step.
  9. Check for open or short to voltage in Brown wire between AIR solenoid and PCM connector C2 terminal No. 36. See Figure. Repair as necessary. After repairs, go to step  16. If circuits are okay, go to step  12.
  10. Check for short to ground in Brown wire between AIR solenoid and PCM connector C2 terminal No. 36. See Figure. Repair as necessary. After repairs, go to step  16. If circuits are okay, go to step  12.
  11. Check for poor connections at AIR pump relay. Repair as necessary. After repairs, go to step  16. If connections are okay, go to step  14.
  12. Check for poor connections at PCM. Repair as necessary. After repairs, go to step  16. If connections are okay, go to step  15.
  13. Repair open or short to ground in Orange wire between AIR PUMP relay and splice S177. S177 is located in headlight harness approximately 2" from harness breakout to bottom underhood fuse block. After repairs, go to step  16.
  14. Replace AIR pump relay. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After replacing relay, go to step  16.
  15. Replace PCM. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After replacing PCM, go to next step.
  16. Using scan tool, clear DTCs. Turn ignition off for at least 30 seconds. Start engine and allow it to reach normal operating temperature. 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, go to step  2.
  17. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no undiagnosed DTCs are displayed, system is okay.
scientia non olet · About LEMON Manuals