Circuit Description
This is a variable indicating the state of the RFA FOB. This information is transmitted by the RFA-X module to the body control module (BCM). The BCM shall generate GMLAN messages in response to received X-LINK messages only as required to support distributed functionality for Entry Control, Security Feedback, etc. within the vehicle.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B3001 X Link Programming/Diagnostic mode acknowledge message not received.
This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description in Vehicle DTC Information.
DTC Symptom | DTC Symptom Descriptor |
|---|---|
01 | Short to Battery |
02 | Short to Ground or Open |
73 | Parity Error |
Conditions for Running the DTC
The RFA Enabled and power mode are equal to Off, Acc, Run, or Crank.
Conditions for Setting the DTC
All of the following conditions exist for more than 1 second.
3100.01
The RFA input is inactive high, while the BCM is asserting the RFA Link output low during a transmission on the RFA Link output.
3100.02
The RFA Link input is active low for more than 1 second.
3100.73
The BCM receives a message 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
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Keyless Entry Schematics Connector End View Reference: Keyless Entry Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Is the DTC B3100 a current code? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
Does the DMM indicate battery voltage? | Go to Step 5 | Go to Step 4 | |
4 | Test the keyless entry serial data circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
5 | Inspect for poor connections at the harness connector of the RCDLR. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 8 |
7 |
Important: Perform the keyless entry transmitter programming procedure when replacing the RCDLR. Replace the RCDLR. Refer to Remote Control Door Lock Receiver Replacement . Did you complete the replacement? | Go to Step 9 | -- |
8 |
Important: Perform the BCM programming procedure when replacing the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration in Computer/Integrating Systems for replacement, setup, and programming. Replace the BCM. Refer to Body Control Module Replacement in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |
