Engine Control Module (ECM)/Powertrain Control Module (PCM)
- Ignition 1 Signal
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Display indicates ON when the ignition 1 input circuit of the module receives a battery signal from the ignition switch.
- Stoplamp Pedal Switch
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Display Applied or Released status of the stoplamp pedal switch.
- TCC Brake Switch
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Displays ON or OFF status of the TCC Brake switch.
- TR Sw. A/B/C/P
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Displays LOW or HI for the state of each of the four inputs from the IMS. LOW displayed indicates a low voltage signal (0 volts) being monitored at the ECM/PCM. HI displayed indicates a high voltage signal (B+) being monitored at the ECM/PCM.