B1483

CIRCUIT DESCRIPTION
This DTC sets based upon the state of the inadvertent power relay control circuit in relation to the state expected by the BCM. The BCM controls the inadvertent power relay as part of the electrical power management system for this vehicle.

In order to minimize any battery rundown, the BCM can detect if certain electrical loads have been left on. When the BCM detects that the ignition is cycled to the OFF position, the BCM immediately checks the status of the courtesy lamp request circuit. If the BCM detects that a load is present, the BCM continues to keep the inadvertent power relay ON for 10 minutes by grounding the inadvertent power relay control circuit. If after 10 minutes the BCM still recognizes that a load is present, the BCM will turn OFF the inadvertent power relay, removing the battery voltage from the loads. The BCM continues to monitor the load monitor input circuit for a switch transition. The BCM will again turn the relay ON for 10 minutes after a switch transition.

CONDITIONS FOR RUNNING THE DTC
^ Battery Rundown Protection/Inadvertent Power must be enabled.
^ The BCM must not be commanding the inadvertent power relay INACTIVE.

CONDITIONS FOR SETTING THE DTC
^ The BCM is not commanding the inadvertent power relay INACTIVE.
^ The BCM detects a short to voltage in the inadvertent power relay control circuit.
^ The above conditions last for more than 300 milliseconds.

ACTION TAKEN WHEN THE DTC SETS
^ The interior courtesy lamps do not operate.
^ The BCM stores DTC B1483 in memory.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC B1483 will clear if the short to voltage in the inadvertent power relay control circuit is no longer detected by the BCM.
^ A history DTC B1483 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

TEST DESCRIPTION

Steps 1-13:

The number(s) below refer to the step number(s) on the diagnostic table.
2. Listen for an audible click when the inadvertent power relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
3. Tests for voltage at the coil side of the inadvertent power relay. The DIC/RKE fuse supplies power to the coil side of the inadvertent power relay.
4. Verifies that the Body Control Module (BCM) is providing ground to the inadvertent power relay.
5. Tests if ground is constantly being applied to the inadvertent power relay.