B1973
CIRCUIT DESCRIPTIONThe systems under controlled power are supplied voltage through the controlled power relay. The CONTROLLED POWER Relay Coil Control circuit is grounded whenever the body control module (BCM) is awake, and for 15 minutes after the ignition switch is turned to the LOCK position. After 15 minutes elapse, the battery positive voltage output circuit turns ON. The battery positive voltage output can supply up to 2 amps for up to 3 days. If the BCM detects that more than 2 amps are needed, the BCM wakes up and grounds the CONTROLLED POWER Relay Coil Control circuit.
CONDITIONS FOR SETTING THE DTC
The BCM determines that a short to battery positive voltage is present on the CONTROLLED POWER Relay Coil Control circuit.
ACTION TAKEN WHEN THE DTC SETS
The BCM turns off the battery positive voltage output if the ignition is in one of the following positions:
^ LOCK
^ OFF
^ ACC
CONDITIONS FOR CLEARING THE DTC
^ A current DTC clears when the malfunction is no longer present.
^ A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.
TEST
