B3100

DTC B3100

CIRCUIT DESCRIPTION
When any keyless entry transmitter button is pressed, an RF signal is sent to the remote control door lock receiver (RCDLR) indicating the specific function desired (lock, unlock, rear compartment release, or panic). This information is transmitted by the RCDLR to the body control module (BCM) via the keyless entry serial data circuit. When this information is received, the BCM performs the specific requested keyless entry function.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B3100 Keyless Entry Data Link Circuit




This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description. DTC Symptom Description

CONDITIONS FOR RUNNING THE DTC
Remote function actuator (RFA) is enabled and the vehicle power mode is equal to Off, Acc, Run, or Crank.

CONDITIONS FOR SETTING THE DTC
All of the following conditions exist for more than 1 second.

B3100 01
The serial data input from the RCDLR is shorted to battery positive voltage while the BCM is grounding the serial data circuit during a transmission.

B3100 02
The serial data input from the RCDLR is open or shorted to ground when active.

B3100 73
The BCM receives a message from the RCDLR that has a parity error.

ACTION TAKEN WHEN THE DTC SETS
The RFA system is inoperative.

CONDITIONS FOR CLEARING THE MIL/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.

TEST DESCRIPTION

Step 1 - Step 8:

The number below refers to the step number on the diagnostic table.
2. This step checks the keyless entry serial data circuit for voltage supplied by the RCDLR.