• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Short to Voltage | Parity | Signal Performance |
---|---|---|---|---|
Keyless Entry Data Link Circuit | B3102 | B3101, B3103 | B3106 | B3101 |
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, 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.
• | The system voltage is at least 9 volts and no more than 16 volts. |
• | The BCM must be receiving a message from the RCDLR while in the program mode. |
The BCM detects a short to voltage in the keyless entry serial data circuit.
The keyless entry system will not operate.
• | A current DTC will clear when the fault is no longer present and the ignition switch is cycled. |
• | The history DTC will clear after 100 consecutive ignition cycles without a fault present. |
• | A scan tool may be used to clear history and current DTCs. |
Remote Function Connector End Views
⇒ | If the test lamp does illuminate, test the keyless entry serial data circuit for a short to voltage. If the circuit tests normal, replace the BCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM or RCDLR replacement, setup, and programming