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Home >> Mazda >> 2000 >> MPV DX >> Repair and Diagnosis >> External Pages >> Different car >> Section 69 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1623: Code Word Or Key Id Number Read/Write Error In Pcm >> Diagnostic Procedures
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Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Mazda MPV and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check for service bulletins and on-line information. Repair as necessary. After repair, go to next step.
  2. Verify DTC P1623 Detected Again -  Using scan tool, clear all DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Turn ignition off. Start engine. Recheck DTCs. If DTC P1623 is present, replace PCM. Perform reprogram procedure. See appropriate IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT. After repair, go to next step. If DTC P1623 is not present, go to next step.
  3. Verify After Repair Procedure -  Using scan tool, perform after repair procedure. See AFTER REPAIR PROCEDURE . If DTC is not present, testing is complete. If any DTC is present, go to appropriate test for diagnosis and repair.
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