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Excessive Speed Loss On Hills

  1. Perform On-Board Diagnostic (OBD) System Check. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If On-Board Diagnostic (OBD) System Check has been performed, go to next step.
  2. Turn ignition switch to OFF position. Disconnect cruise control servo harness connector. Disconnect Gray 35-pin PCM harness connector C1, located under right side of instrument panel. Check for open or short to ground in Gray wire between cruise control servo connector terminal No. 7 and Gray 35-pin PCM harness connector C1 terminal No. 4. See Figure . See CRUISE CONTROL SERVO CONNECTOR TERMINAL IDENTIFICATION  table. See WIRING DIAGRAMS  . Repair Gray wire as necessary and retest operation. If Gray wire is okay, go to next step.
  3. Ensure cruise control servo harness connector and Gray 35-pin PCM harness connector C1 are disconnected. Check for open or short to ground in Pink/Blue wire between cruise control servo harness connector terminal No. 3 and Gray 35-pin PCM harness connector terminal No. 35. See WIRING DIAGRAMS  . Repair as necessary and retest operation. If Pink/Blue wire is okay, go to next step.
  4. Replace cruise control servo. See CRUISE CONTROL SERVO  under REMOVAL & INSTALLATION. Retest operation.
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