Scan Tool Data Definitions

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Scan Tool Data Definitions

Body Control Module (BCM)
Battery Voltage Signal
Display indicates battery voltage. Measured in volts.

BTSI Solenoid
Displays the status of the control circuit for the shift lock control solenoid. ON indicates the control circuit is grounded. OFF indicates that the control circuit is not grounded.

Engine Control Module (ECM) / Powertrain Control Module (PCM)
BPP Circuit Signal
Display Applied or Released status of the brake pedal position signal.

Ignition 1 Signal
Display indicates ON when the ignition 1 input circuit of the module receives a battery signal from the ignition switch.

Stoplamp Pedal Switch
Display Applied or Released status of the stoplamp pedal switch.

TCC Brake Switch
Displays ON or OFF status of the TCC Brake switch.

TR Sw.
Displays Park, Reverse, Neutral, Drive 5, Drive 4, Drive 3, Drive 2 or Drive 1.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.