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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 C0161: Abs/TCS Brake Switch Circuit Malfunction >> 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. 3. This DTC detects an open stop lamp switch signal circuit from the stop lamp side of the splice to the EBCM.
  2. 4. The EBCM sources 5 volts on the stop lamp switch signal circuit. This small voltage has a ground path through the stop lamp bulbs. This DTC sets if the path to ground is open.
  3. 7. With the scan tool, Test for the current state of the brake lamp switch parameter.
  4. 10. Test the stop lamp signal circuit for a short to voltage.
    Fig 1: DTC C0161 (1 Of 2)
    G01757501Courtesy of GENERAL MOTORS CORP.
    Fig 2: DTC C0161 (2 Of 2)
    G01757502Courtesy of GENERAL MOTORS CORP.
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