B2806

DTC B2806 RFA Link Parity Error:

DTC B2806 RFA Link Parity Error (Part 1 Of 2):

DTC B2806 RFA Link Parity Error (Part 2 Of 2):

CIRCUIT DESCRIPTION
The keyless entry system allows the driver to do the following functions from outside the vehicle by using a hand held radio transmitter:
^ Unlock door locks. The courtesy lights activate automatically when using this function.
^ Lock door locks.
^ Release the rear compartment lid.
^ Remote alarm.

The transmitter operates in the UHF band. The transmitter sends digitally coded signals to the Remote Control Door Lock Receiver (RCDLR) when pressing any of the transmitter buttons.

The RCDLR detects and decodes transmitter signals. For locking, unlocking, and remote alarm commands, the RCDLR sends command messages to the Body Control Module (BCM) to operate the door locks actuators courtesy lights, and remote alarm.

CONDITIONS FOR SETTING THE DTC
The BCM detects a message with a parity error not recognized from the RCDLR.

ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B2806 in memory.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC B2806 is cleared automatically at the end of conclusion of the message containing the parity error.
^ A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
^ Using a scan tool.

DIAGNOSTIC AIDS
^ The following conditions may cause an intermittent malfunction to occur:
- The RCDLR does not send a correct signal to the BCM.
- An intermittent open in circuit 917.
^ DTC P1626 will set in the Powertrain Control Module (PCM) when the ignition switch is in the RUN position with the Body Control Module (BCM) disconnected. When BCM diagnostics and repairs are completed, refer to the Engine Controls for additional information on PCM related DTCs. Powertrain Management

TEST DESCRIPTION
Numbers below refer to the step numbers on the diagnostic table.
2. Checks for keyless entry transmitter operation.
3. Checks if this DTC resets after operating the keyless entry transmitter.
4. Checks for an open in circuit 917.
5. Checks for an open in circuit 917.
6. Checks the ability of the BCM to operate the door locks.
7. If certain BCM current DTCs are present perform the diagnostic tables for these DTCs first.