Console Shift

The system consists of the following components:

• The park relay.
• The ignition 3 relay.
• The stoplamp switch.
• The A/T shift interlock solenoid.
• The A/T shift interlock control relay.
• The rear integration module (RIM).
• The powertrain control module (PCM).

With the ignition ON, battery voltage is supplied to the coil side feed circuit of the park relay. When the RIM receives a PARK signal though a class 2 serial data message from the PCM, the RIM grounds the control circuit of the park relay. This energizes the park relay coil and closes the switch contacts in the relay. Battery voltages flows through the switch side of the park relay to the stoplamp switch. The contacts in the stoplamp switch are normally closed allowing voltage to flow to the coil side of the shift lock relay. The coil side of the shift lock relay is permanently grounded. This energizes the shift lock relay, opening the normally closed switch side contacts. With the switch contacts open the A/T shift interlock solenoid de-energizes, locking the shift lever in the PARK position.

When the driver presses the brake pedal, the contacts in the stoplamp switch open, de-energizing the shift lock relay. The switch side contacts close and voltage form the ignition 3 relay flows through the shift lock relay contacts to the permanently ground A/T shift interlock solenoid. The solenoid energizes and unlocks the shift lever, allowing the driver to move the shift lever out of the PARK position. When the shift lever is moved out of the PARK position, the PCM sends a class 2 serial data message to the RIM. The RIM then opens the ground path of the park relay control circuit, de-energizing the park relay and the shift lock relay. Once the vehicle is out of PARK, the A/T shift interlock solenoid remains energized or unlocked until the RIM receives a PARK signal from the PCM.