Note. For circuit identification, see CONNECTOR IDENTIFICATION and/or WIRING DIAGRAMS .
Circuit Description
The Internal Mode Switch (IMS) is a sliding contact switch attached to the selector detent inside the transaxle side cover. The four inputs to the PCM indicate the position of the range selector. The input voltage level at the PCM is high (battery voltage) when the IMS is open, and low when the switch is closed to ground. The four input parameters represented are Signals "A", "B", "C" and "P" (Parity). See INTERNAL MODE SWITCH LOGIC table under DTC P1819.
If the PCM detects an invalid range with the engine running, then DTC P1825 sets. DTC P1825 is a type "C" DTC.