Accessory relay

The accessory relay works in conjunction with the IPM's power accessory delay feature to control the operation of the radio, amplifier, EVIC, power windows, washer motors, wiper motors, power sunroof, and power outlet. The accessory relay is turned on through low side control internal to the IPM as soon as the IPM receives information from the BCM that the ignition is in the ACCY or RUN position. This circuit is electronically controlled and continuously monitored for malfunctions. Depending on the ignition switch position, the accessory relay will remain on or will time-out and turn off. The accessory relay remains on in the RUN and ACCY positions of the ignition switch. In the OFF position, the relay will remain energized for 45 seconds then turn off. During this time-out period, if the driver or passenger doors are opened, the relay will turn off immediately. While the ignition switch is in the START position, the relay will also drop-out, then resume operation. Accessory relay operation is most noticeable by observing the operation of the radio.