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DTC P0500: Vehicle Speed Sensor (VSS) Malfunction

  1. Perform basic diagnostic procedure. See BASIC DIAGNOSTIC PROCEDURE . If DTC P0720 exists, diagnose and repair that DTC. If only DTC P0500 exists, go to next step.
  2. Check speedometer operation. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. If speedometer operation is abnormal, check power supply and ground circuit to instrument cluster. See WIRING DIAGRAMS article. Check wiring and connections between instrument cluster and vehicle speed sensor (VSS). Repair or replace parts as necessary. If speedometer operation is normal, go to next step.
  3. Turn ignition off. Disconnect 18-pin (30-pin on Legacy and Outback 2.5L) instrument cluster connector. Using an ohmmeter, backprobe between ECM connector B135 (28-pin connector) terminal No. 24 and instrument cluster connector terminal No. 13 (No. 10 on Impreza and Outback Sport; No. 7 on Forester). See Figure, Figure and Fig 1 . If resistance is less than 10 ohms, repair poor terminal contact in ECM connector. If resistance is not less than 10 ohms, locate and repair open circuit in wiring and check for poor terminal contact in connectors between ECM and instrument cluster. Clear memory and perform verification procedure. See CLEARING DIAGNOSTIC TROUBLE CODES  and VERIFICATION PROCEDURE  .
    Fig 1: Instrument Panel 18-Pin Harness Connector Terminal Identification (Forester, Impreza & Outback Sport)
    G00013023Courtesy of SUBARU OF AMERICA, INC.
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