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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Engine Controls - Self-Diagnostics - 2.5L) >> Diagnostic Tests >> DTC P0500: VSS Circuit Malfunction & DTC P1501: VSS Signal Out Of Self-Test Range >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure FREEZE FRAME DATA has been recorded. Check for related service bulletins. Repair as necessary and go to next step.
  2. Start engine. Using scan tool, check VSS PID data. Drive vehicle at speed more than 6.2 MPH. If VSS PID data does not change, go to next step. If VSS PID data changes, problem is intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
  3. Turn ignition off. Disconnect VSS connector. Check for loose, damaged or corroded connector terminals. Repair as necessary, and go to step  7 . If connector terminals are okay, go to next step.
  4. Inspect VSS operation. See SYSTEM & COMPONENT TESTING - MIATA, MILLENIA, MPV, PROTEGE, PROTEGE5 & 626 article. Replace VSS as necessary and go to step  7 . If VSS is okay, go to next step.
  5. Turn ignition off. Disconnect PCM connector. Check for loose, damaged or corroded connector terminals. Repair as necessary, and go to step  7 . If connector terminals are okay, go to next step.
  6. Check for open or short in Gray/Blue wire between PCM connector terminal No. 58 and VSS connector terminal "B", and in Red/Black wire between PCM connector terminal No. 33 and VSS connector terminal "A". See Figure . See WIRING DIAGRAMS article. Repair as necessary and go to next step. If wires are okay, go to next step.
  7. Reconnect all connections. Turn ignition on. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Drive vehicle at speeds more than 6.2 MPH. Check for DTCs during KOER or KOEO self-test. If DTC P0500 is present, replace PCM and go to next step. See REMOVAL, OVERHAUL & INSTALLATION article. On vehicles equipped with immobilizer system, reprogram ignition key identification numbers. See COMPUTER RELEARN PROCEDURES - IMPORT article in GENERAL INFORMATION. If DTC P0500 is not present, go to next step.
  8. Perform DTC confirmation procedure. See DTC CONFIRMATION PROCEDURE  under SELF-DIAGNOSTIC SYSTEM. Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If any other DTC is present, go to appropriate test.
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