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Home >> Chevrolet >> 2001 >> Impala Base, 3.8 K >> Repair and Diagnosis >> External Pages >> Different car >> Section 493 (Anti-Lock Brake System) >> Diagnostic Information And Procedures >> DTC U1651: Loss Of Class 2 Serial Data Communications >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. Tests the ignition circuit for an open.
  2. 3. Checks the ground circuit for an open.
  3. 4. Tests the CAN HI circuit for an open.
  4. 5. Tests the CAN LO circuit for an open.
  5. 6. Checks the steering angle sensor connector for poor connections.
    Fig 1: DTC U1651 (1 Of 2)
    G01757529Courtesy of GENERAL MOTORS CORP.
    Fig 2: DTC U1651 (2 Of 2)
    G01757530Courtesy of GENERAL MOTORS CORP.