Diagnostic Starting Point - Keyless Entry
Begin the system diagnosis with Diagnostic System Check - Remote Keyless Entry . The Diagnostic System Check will provide the following information
- The identification of the control module(s) which command the system
- The ability of the control module(s) to communicate through the serial data circuit
- The identification of any stored diagnostic trouble codes (DTCs) and their status
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.
Scan Tool Output Controls
| Scan Tool Output Control | Additional Menu Selection(s) | Description |
|---|---|---|
| Program Key Fobs | 1 Key Fobs | The BCM requests the Remote Control Door Lock Receiver to enter the Program Key Fobs mode. Refer to Transmitter Programming for additional information. |
| Program Key Fobs | 2 Key Fobs | The BCM requests the Remote Control Door Lock Receiver to enter the Program Key Fobs mode. Refer to Transmitter Programming for additional information. |
| Program Key Fobs | 3 Key Fobs | The BCM requests the Remote Control Door Lock Receiver to enter the Program Key Fobs mode. Refer to Transmitter Programming for additional information. |
| Program Key Fobs | 4 Key Fobs | The BCM requests the Remote Control Door Lock Receiver to enter the Program Key Fobs mode. Refer to Transmitter Programming for additional information. |
Scan Tool Output Controls
Scan Tool Data List
The Keyless Entry Scan Tool Data List contains all of the keyless entry related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The column, "Data List," indicates the location of the parameter within the scan tool menu selections. Use the Keyless Entry Scan Tool Data List as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with Diagnostic System Check - Remote Keyless Entry .
Use the Scan Tool Data List only after the following is determined
- There is no published DTC procedure nor published symptom procedure for the customer concern.
- The DTC or symptom diagnostic procedure indicated by the diagnostic system check does not resolve the customer concern.
The Typical Data Values are obtained from a properly operating vehicle under the conditions specified in the first row of the Scan Tool Data List table. Comparison of the parameter values from the suspect vehicle with the Typical Data Values may reveal the source of the customer concern.
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Ignition ON/Engine OFF | |||
| RFA Serial Data Link | Outputs | Active/Inactive | Inactive |
Scan Tool Data List
Diagnostic Trouble Code (DTC) List
| DTC | Diagnostic Procedure | Module(s) |
|---|---|---|
| B3102 | DTC B3102 | BCM |
Diagnostic Trouble Code (DTC) List
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.
Conditions for Running the DTC
- The ignition is ON.
- The system voltage is at least 9.0 volts and no more than 16.0 volts.
Conditions for Setting the DTC
- The keyless entry serial data circuit is shorted to ground.
- The above conditions must be met for approximately 300 milliseconds.
Action Taken When the DTC Sets
The keyless entry system will not operate.
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 DTC(s).
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the Keyless Entry System. Refer to «Checking Aftermarket Accessories»(ref-187796-S08905438042005090100000) in Wiring Systems.
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom
- «Panic Mode Inoperative»(ref-187809-S29997865362005090100000)
- «Keyless Entry System Inoperative»(ref-187809-S38376722602005090100000)