Neutral Start

Switch Neutral Start Switch ect ECU

Switch Neutral Start Switch ect ECU

Shift Lever Position Indicator Lights

The ECT ECU only monitors positions "T' and "L." If either of these terminals provides a 12-volt signal to the ECU, it determines that the transmission is in neutral, second gear or first gear. If the ECU does not receive a 12-volt signal at terminals "T' or "1," the ECU determines that the transmission is in the "D" range.

Some neutral start switches have contacts for all gear ranges. Each contact is attached to the gear position indicator lights if the vehicle is so equipped.

In addition to sensing gear positions, the neutral switch prevents the starter from cranking the engine unless it is in the park or neutral position. In the park and neutral position, continuity is established between terminals "B" and "NB" of the neutral start switch illustrated below.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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