LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Oldsmobile >> 1999 >> Cutlass GL, 3.1 M >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Modules >> Diagnostic Tests >> DTC U1016: Loss Of Communications With Powertrain Control Module (Pcm) >> Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC U1016: Loss Of Communications With Powertrain Control Module (Pcm): Testing

  1. Check for open, poor connections or short to ground in power circuits for PCM. See appropriate wiring diagram in POWER DISTRIBUTION article in WIRING DIAGRAMS. If faulty circuit is found and repaired, go to step  5 . If circuits are okay, go to next step.
  2. Turn ignition switch to LOCK position. Check for open or poor connections in ground circuits for PCM. See appropriate wiring diagram in GROUND DISTRIBUTION article in WIRING DIAGRAMS. If faulty circuit is found and repaired, go to step  5 . If circuits are okay, go to next step.
  3. Check for poor connections at power, ground and class 2 serial data circuits of PCM. See appropriate wiring diagram in DATA LINK CONNECTORS article in WIRING DIAGRAMS. If faulty circuit is found and repaired, go to step  5 . If circuit is okay, go to next step.
  4. Diagnose and repair problem in PCM. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. After repairs, go to next step.
  5. Connect scan tool to Data Link Connector (DLC). Using scan tool, display PCM DTCs. If scan tool displays any DTCs that do not begin with "U", go to appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If scan tool does not display additional DTCs, go to next step.
  6. Clear DTCs. Check for PCM DTCs. Continue to diagnose and repair PCM DTCs until all DTCs are repaired. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. After repairs, go to BODY FUNCTION CONTROLLER (BFC) DIAGNOSTIC SYSTEM CHECK  under SYSTEM TESTS.
scientia non olet · About LEMON Manuals