B2187 – OBD-II DTC

OBD-II DTC B2187 – Rear Wiper Select Switch “B” Short to Ground

DTC B2187 meaning

DTC B2187 refers to a diagnostic trouble code indicating a “Rear Wiper Select Switch ‘B’ Short to Ground.” This code is generated when the vehicle’s onboard diagnostic system detects that the rear wiper select switch circuit is shorted to ground, which can affect the operation of the rear wiper system.

DTC B2187 symptoms

Common symptoms associated with DTC B2187 may include:

• Rear wiper not functioning
• Intermittent operation of the rear wiper
• Inability to control rear wiper settings
• Dashboard warning lights illuminated

DTC B2187 causes

Several factors can lead to the occurrence of DTC B2187, including:

• Faulty rear wiper select switch
• Wiring issues, such as damaged or frayed wires
• Corrosion or poor connections in the electrical circuit
• Short circuits in the rear wiper control module

DTC B2187 seriousness

DTC B2187 is considered a moderate issue. While it may not affect the vehicle’s overall drivability, it can impair visibility during inclement weather if the rear wiper is inoperative. Addressing this code promptly is advisable to ensure safe driving conditions.

How to diagnose DTC B2187

To diagnose DTC B2187, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the rear wiper select switch for physical damage or wear.
3. Check the wiring and connectors for signs of corrosion or damage.
4. Test the continuity of the circuit from the switch to the control module.
5. Use a multimeter to check for shorts to ground in the wiring.
6. Replace any faulty components as necessary.

How to fix DTC B2187 step-by-step instructions

To fix DTC B2187, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety.
2. Remove the rear wiper select switch from the vehicle.
3. Inspect the switch for damage and replace it if necessary.
4. Examine the wiring harness for any signs of wear or damage.
5. Repair or replace any damaged wires or connectors.
6. Reconnect the rear wiper select switch and wiring harness.
7. Reconnect the vehicle’s battery.
8. Clear the DTC using an OBD-II scanner and test the rear wiper operation.

How to erase DTC B2187

To erase DTC B2187, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the vehicle to ensure the code does not return.

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