Engine Control Module (ECM)
- Ignition 1 Signal
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The scan tool displays 0 - 20 volts. The scan tool displays the voltage as received on the ignition 1 circuit to the ECM.
- TR Sw.
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The scan tool displays Park, Reverse, Neutral, Drive 5, Drive 4, Drive 3, Drive 2 and Drive 1. The scan tool displays the position of the transmission range switch.