Transmission Position Sensor/Switch: Testing and Inspection

Engine Management (DME/EML 1.3):

1. With the ignition switch OFF, disconnect the DME control unit harness connector (located in the E-Box).
2. Turn the ignition switch to the RUN position and place the transmission range selector in park or neutral. Make the following voltage measurements at the harness connector.

^ Brown/black wire (terminal 42) and ground = Battery voltage. If not, check fuse F17 at the front power distribution box

3. If OK, disconnect harness connector at the transmission range selector switch and make the following voltage/resistance measurements.

^ Brown/black wire (terminal 3) of range selector switch to terminal 42 of the DME control unit = 0 Ohms. If not, check for an open.
^ Terminal 1 of connector and ground = Battery voltage. If not, check wire from terminal 1 to fuse F17 for an open and repair or replace as necessary.

4. If OK, check for continuity at the transmission range selector switch terminals 1 and 3 = 0 Ohms. If not the transmission range selector switch is defective