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.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B3106 Keyless Entry Data Link Parity Error
Conditions for Setting the DTC
The BCM detects an invalid message from the RCDLR, a message with a parity error.
Action Taken When the DTC Sets
The BCM stores DTC B3106 in memory.
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 DTCs. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Keyless Entry Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Does the scan tool display DTC B1003, B3102 or B3103? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | Go to Step 3 |
3 | Replace the remote control door lock receiver (RCDLR). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | System OK | -- |
