B1829 – OBD-II DTC

OBD-II DTC B1829 – Wiper Rear High Limit Input Circuit Short To Ground

DTC B1829 meaning

DTC B1829 refers to a diagnostic trouble code indicating a problem with the rear wiper’s high limit input circuit. Specifically, it suggests that there is a short to ground in the circuit that monitors the rear wiper’s position or operation. This can prevent the rear wiper from functioning correctly, as the system is unable to receive accurate feedback about its status.

DTC B1829 symptoms

Common symptoms associated with DTC B1829 may include:

• Rear wiper not functioning at all
• Intermittent operation of the rear wiper
• Rear wiper operating continuously
• Dashboard warning lights illuminated

DTC B1829 causes

Several factors can lead to the occurrence of DTC B1829, including:

• Damaged wiring or connectors in the rear wiper circuit
• Faulty rear wiper motor
• Defective wiper control module
• Corrosion or poor connections in the circuit

DTC B1829 seriousness

The seriousness of DTC B1829 can vary based on the vehicle’s use and the specific symptoms present. While it may not pose an immediate safety risk, it can lead to reduced visibility in adverse weather conditions if the rear wiper is inoperative. Therefore, it is advisable to address this issue promptly to ensure proper vehicle functionality.

How to diagnose DTC B1829

To diagnose DTC B1829, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Inspect the wiring and connectors related to the rear wiper circuit for any visible damage or corrosion.
3. Check the rear wiper motor for proper operation by applying direct power to it.
4. Test the wiper control module for faults or malfunctions.
5. Perform continuity tests on the circuit to identify any shorts to ground.

How to fix DTC B1829 step-by-step instructions

To fix DTC B1829, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors found during diagnosis.
3. If the rear wiper motor is faulty, replace it with a new or refurbished unit.
4. Replace the wiper control module if it is determined to be defective.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the rear wiper to ensure it operates correctly and that the DTC does not reappear.

How to erase DTC B1829

To erase DTC B1829, 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 DTC menu on the scanner and select the option to clear or erase codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the DTC does not return.

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