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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 59 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1624: Immobilizer System Communication Counter = 0 >> Diagnostic Procedures

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.
CAUTION: DO NOT crank engine before replacement PCM is programed to immobilizer system or PCM will be severely damaged. If test procedures require replacement of PCM on a vehicle equipped with immobilizer system, vehicle must be sent to authorized Mazda dealer to have replacement PCM programed.
  1. Check for service bulletins and on-line information. Repair as necessary. After repair, go to next step.
  2. Follow Other Detected DTC First -  Turn ignition off, then to START position. If DTC P1602 is not present, go to next step. If DTC P1602 is present, go to DTC P1602: IMMOBILIZER UNIT TO PCM COMMUNICATION ERROR .
  3. Inspect Poor Connection Of Immobilizer Unit Connector -  If DTC P1621 is not present, go to next step. If DTC P1621 is present, go to DTC P1621: CODE WORD DOES NOT MATCH AFTER ENGINE CRANKING .
  4. Verify Trouble Shooting Of DTC P1624 Completed -  Reconnect all components. 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.
  5. 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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