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Home >> Chevrolet >> 2006 >> Impala SS >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Shift Interlock System >> Diagnostic Information and Procedures >> Scan Tool Data Definitions >> Engine Control Module (ECM)

Engine Control Module (ECM)

Current Gear

Displays current gear position of the transmission

TCC Brake Switch

Displays ON or OFF status of the TCC Brake switch.

TR Sw. A/B/C/P

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. HI displayed indicates a high voltage signal (B+) being monitored at the ECM.