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HOMESERVICE MANUALSMERCURY1998MOUNTAINEER 5.0 P, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 51 (COMPUTER RELEARN PROCEDURES)COMPUTER RELEARN PROCEDURESMUSTANGMATCHING SECURITY IDENTIFICATION BETWEEN INSTRUMENT CLUSTER & PCM
1998 Mercury Mountaineer 5.0 P, AWD

Matching Security Identification Between Instrument Cluster & PCM

1998 Mercury Mountaineer 5.0 P, AWDSECTION Matching Security Identification Between Instrument Cluster & PCM
WARNING: This page does not describe the selected car, but rather 26 other vehicles, including the 1999 Mercury Villager, 1999 Mercury Tracer, 1999 Mercury Sable, 1999 Mercury Mystique, and 1999 Mercury Mountaineer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using NGS tester, perform instrument cluster self-test. If DTC B2139 is retrieved, go to next step. If DTC B2139 is not retrieved, system is okay at this time.
  2. Perform security access for instrument cluster. See KEY PROGRAMMING - SECURITY ACCESS PROCEDURE. Using NGS tester, select PARAMETER RESET command for instrument cluster. Using NGS tester, select PARAMETER RESET command for PCM. Turn ignition switch to RUN position for 3 seconds. Turn ignition switch to LOCK position. Using NGS tester, perform instrument cluster self-test. If DTC B2139 is not retrieved, system is okay at this time. If DTC B2139 is retrieved, verify PCM calibration is correct for vehicle. If calibration is okay, replace instrument cluster and repeat this test. If DTC B2139 still exists, replace PCM.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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