B1003

CIRCUIT DESCRIPTION
The remote control door lock receiver (RCDLR) communicates with the body control module (BCM) through the keyless entry serial data circuit. When any button on the keyless entry transmitter is pressed, the transmitter sends a signal to the RCDLR. The RCDLR sends a lock, unlock, rear release, or panic alarm request to the BCM, depending on which button is pressed on the transmitter. The BCM receives the message and performs the appropriate function. The BCM also uses the keyless entry serial data circuit in order to communicate with the RCDLR when programming transmitters.

CONDITIONS FOR RUNNING THE DTC
^ The system voltage is at least 9.0 volts and no more than 16.0 volts.
^ This condition can only occur during transmitter programming.

CONDITIONS FOR SETTING THE DTC
The BCM does not receive an acknowledgment message from the RCDLR within 300 milliseconds of a second Programming Mode/Diagnostic Mode request.

ACTION TAKEN WHEN THE DTC SETS
The keyless entry system will not operate.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC will clear when the fault is no longer present and the ignition switch is cycled.
^ A history DTC will clear after 100 consecutive ignition cycles without a fault present.
^ A scan tool may be used to clear history and current DTC(s).

DIAGNOSTIC AIDS
^ Always begin diagnosis with the first DTC listed on the scan tool.
^ Perform a visual inspection for loose or poor connections at all related components.
^ If the DTC B1003 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.

TEST DESCRIPTION

Steps 1-8:

The number(s) below refer to the step number(s) on the diagnostic table.
3. This step checks for a short to voltage.