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Test Procedure

  1. This step checks for intermittent operating conditions.
  2. This step checks to see if the open is in circuits 800F or 800D.
  3. If there is an open in circuits 800F or 800D, this step finds which side of the ALDL it is on.
  4. This step checks for an open in circuit 800E.
Fig 1: DTC B334: Loss Of ECM Data Flow Chart
G00103588Courtesy of GENERAL MOTORS CORP.
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