LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2001 >> S10 Pickup 2D Pickup, 2.2 5, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 2.2L >> System Tests >> Mil Inoperative
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Mil Inoperative

NOTE: For circuit reference, see appropriate WIRING DIAGRAM article.
Fig 1: PCM Harness Connector Terminal Identification
G00057657Courtesy of GENERAL MOTORS CORP.
  1. Perform powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check, go to next step.
  2. Check GAUGES fuse that supplies voltage to MIL. Fuse is located in passenger compartment fuse/relay block. If fuse is open, go to step  10. If fuse is okay, go to next step.
  3. Turn ignition off. Disconnect PCM harness connector. Turn ignition on, with engine off. Connect fused jumper wire (3-amp) between ground and PCM harness connector C2 terminal No. 46 (Brown/White wire). See Fig 1. Observe MIL. If MIL illuminates, go to step  9. If MIL does not illuminate, go to next step.
  4. Check fuse in jumper wire. If fuse is open, go to step  11. If fuse is okay, go to next step.
  5. Remove Instrument Panel Cluster (IPC) harness connector. Check for open in Brown/White wire between IPC harness connector terminal A11 and PCM harness connector C2 terminal No. 46. See Fig 1. Repair as necessary. After repairs, go to step  14. If circuit is okay, go to next step.
  6. Using test light connected to ground, probe IPC harness connector terminal A7 (Pink wire). If test light illuminates, go to step  8. If test light does not illuminate, go to next step.
  7. Repair open Pink wire. After repairs, go to step  14.
  8. Check IPC harness connector for poor connections. Repair as necessary. After repairs, go to step  14. If connections are okay, go to step  12.
  9. Check PCM harness connector for poor connections. Repair as necessary. After repairs, go to step  14. If connections are okay, go to step  13.
  10. Repair short to ground in Pink wire between instrument panel fuse block and IPC harness connector terminal A7. See WIRING DIAGRAMS article. After repairs, go to step  14.
  11. Repair short to voltage in Brown/White wire. After repairs, go to step  14.
  12. Replace IPC assembly. See appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. After repairs, go to step  14.
  13. Replace PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. Perform PCM relearn procedure. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After repairs, go to next step.
  14. Operate system to verify repair.
scientia non olet · About LEMON Manuals