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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 P0650: Malfunction Indicator Light (Mil) 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 MIL on and off. If MIL turns on and off as commanded, see DIAGNOSTIC AIDS . If MIL does not turn on or off when commanded, go to next step.
  3. Turn ignition off. Disconnect PCM harness connector containing MIL control circuit. Turn ignition on. If MIL is off, go to next step. If MIL is on, go to step  5.
  4. Connect a fused jumper wire between ground and MIL control circuit at PCM connector (harness side). If MIL is on, go to step  6. If MIL is not on, go to step  7.
  5. Repair short to ground in MIL control circuit. After repairs, go to step  9.
  6. Check connections at PCM. Repair as necessary. After repairs, go to step  9. If connections are okay, go to step  8.
  7. Check for faulty MIL bulb, open ignition feed circuit to bulb, or MIL control circuit open or shorted to battery voltage. Repair as necessary. After repairs, go to step  9.
  8. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  9. 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.
  10. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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