Description:

Error code BIF 002865.02 is triggered when the control unit detects several implausible input signals from the wiper switch (S128), which controls both the windshield and rear window wipers. This fault typically indicates either a malfunction in the wiper switch itself or an issue within the wiring circuit, specifically affecting the rear window wiper operations.

Reaction:

This signal fault can lead to erratic or non-functional rear window wiper operations, potentially compromising rear visibility during inclement weather conditions.

Recommendations:

• Inspect and Test Wiper Switch (S128): Check the wiper switch for signs of physical damage, wear, or electrical issues. Test the switch to verify its functionality, focusing on outputs related to the rear window wiper.
• Check Wiring and Connections: Investigate any loose, corroded, or damaged wires connected to the wiper switch. Ensure all connections are secure and replace any compromised wiring to ensure accurate signal transmission.
• Monitor Control Unit Inputs: Use diagnostic equipment to observe the inputs received by the control unit from the wiper switch, helping to identify if the problem is localized to the switch or involves additional electrical system concerns.
• Replace Faulty Switch: If diagnostics confirm the wiper switch is defective, replace it to restore proper control and functionality to the rear window wipers.
• System Reset and Operational Test: After conducting repairs or component replacements, reset the electrical system to clear the diagnostic trouble code and perform a comprehensive test to confirm that the rear window wipers are fully operational.

Note:

Regular maintenance of wiper system components is essential for safe vehicle operation. Ensuring that the wiper switches and related electrical circuits are in good working condition helps maintain visibility and safety for all vehicle operations, particularly in adverse weather conditions.