C1414-1: Identify Vehicle System

- Determine if the vehicle is equipped with anti-lock brakes (ABS) or anti-lock brakes with traction control (ABS/TC).

- Is vehicle traction control equipped?

YES -- Go to C1414-2. C1414-2: Check Circuit 91 (BK/BL)

NO -- Go to C1414-4. C1414-4: Check Circuit 91 (BK/BL) For Open