Circuit Description
The Body Control Module (BCM) is connected to the Remote Control Door Lock Receiver by the keyless entry serial data circuit. This circuit is the link for communication between the two modules.
Conditions for Running the DTC
The BCM is in the transmitter program mode.
Conditions for Setting the DTC
The BCM does not receive an acknowledgment message from the remote control door lock receiver after sending a Programming Mode/Diagnostic Mode request.
Action Taken When the DTC Sets
The BCM stores DTC B2805 in memory.
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present and the scan tool Clear DTCs function is used. |
| • | The BCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
| • | Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with a reappearance of the malfunction. |
| • | If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Remote Keyless Entry Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the voltage measure within the specified range? | 4-5V | Go to Step 6 | Go to Step 3 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 4 | |
4 | Test the Keyless Entry Serial Data circuit for an open, high resistance, or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 7 |
5 | Test the Keyless Entry Serial Data circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the Remote Control Door Lock Receiver. 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 10 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the Body Control Module. 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 10 | Go to Step 9 |
8 |
Important: All transmitters which are to be recognized by the Remote Control Door Lock receiver must be programmed in a single programming sequence. If the system is placed in program mode it will erase all previously programmed transmitters upon the receipt of the programming signal from the first transmitter Replace the Remote Control Door Lock Receiver. Refer to Receiver Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
9 |
Did you complete the replacement? | -- | Go to Step 10 | -- |
10 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
