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Home >> GMC >> 1996 >> Forward Control 4.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (Engine Controls - System/Component Tests - 2.2L) >> Miscellaneous ECM/Pcm/VCM Controls >> Transmission (C-8) >> Converter Lock-Up Signal At Transmission
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Converter Lock-Up Signal At Transmission

WARNING: This page is about a different car, the 1995 GMC Sonoma and 1995 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. Warm engine to operating temperature. Raise vehicle and support drive wheels. Support suspension where necessary to prevent damage to drive axles.
  2. Disconnect converter clutch connector at transmission. Connect a test light across converter clutch harness terminals. See Figure . Start engine and place transmission in Drive. Accelerate vehicle to 45 MPH and note test light.
  3. If test light is not on, check solenoid power supply wire of harness for open or short to ground. Check ground circuit for open between harness connector and ECM/PCM/VCM. If harness is okay, see CONVERTER LOCK-UP SIGNAL FROM ECM/PCM/VCM below.
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