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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P0650: Malfunction Indicator Light (Mil) Control Circuit >> Diagnostic Procedures

Diagnostic Procedures

  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 CHECKS. After performing powertrain diagnostic system check, go to next step.
  2. Locate and check condition of GAUGES fuse No. 9 (10-amp) located in instrument panel fuse block. If fuse is blown, repair short to ground in Pink wire between GAUGES fuse and Instrument Panel Cluster (IPC) connector terminal A3. See Figure. If fuse is okay, go to next step.
  3. Turn ignition off. Locate PCM and disconnect connectors. See Figure. Connect a fused jumper wire between ground and PCM connector C2 terminal No. 5 (Brown/White wire). See Figure. Turn ignition on. If MIL is on, go to next step. If MIL is not on, go to step  5.
  4. With ignition on, remove fused jumper wire. If MIL remains on, go to step  7. If MIL turns off, go to step  9.
  5. Remove IPC. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. Check for open in Brown/White wire between PCM connector C2 terminal No. 5 and IPC connector terminal A3. Repair as necessary. After repairs, go to step  12. If circuit is okay go to next step.
  6. Check for open in Pink wire between IPC connector terminal A3 and GAUGES fuse located in instrument panel fuse block. Repair as necessary. After repairs, go to step  12. If circuit is okay go to step  8.
  7. Remove IPC. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. Check for short to ground in Brown/White wire between PCM connector C2 terminal No. 5 and IPC connector terminal A3. Repair as necessary. After repairs, go to step  12. If circuit is okay go to step  10.
  8. Check for poor connections at IPC connector. Repair as necessary. After repairs, go to step  12. If connections are okay, go to step  10.
  9. Check for poor connections at PCM connector. Repair as necessary. After repairs, go to step  12. If connections are okay, go to step  11.
  10. Replace IPC. After repairs, go to step  12.
  11. Replace PCM. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After repairs, go to next step.
  12. 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.
  13. 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.
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