B1612 – OBD-II DTC

OBD-II DTC B1612 – Wiper Rear Mode Select Switch Circuit Open

DTC B1612 meaning

DTC B1612 refers to a diagnostic trouble code indicating an open circuit in the rear wiper mode select switch. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components and systems for faults. The rear wiper mode select switch is responsible for controlling the operation of the rear wiper, and an open circuit suggests a failure in the electrical connection or the switch itself.

DTC B1612 symptoms

Common symptoms associated with DTC B1612 may include:

• Rear wiper not functioning
• Inability to change rear wiper modes (e.g., intermittent, continuous)
• Dashboard warning lights illuminated
• Possible issues with other electrical components related to the rear wiper system

DTC B1612 causes

Several factors can lead to the occurrence of DTC B1612, including:

• Faulty rear wiper mode select switch
• Damaged wiring or connectors in the circuit
• Corrosion or poor connections at the switch or related components
• Issues with the body control module (BCM) that processes the switch signals

DTC B1612 seriousness

The seriousness of DTC B1612 can vary depending on the vehicle’s use and the conditions in which it operates. While it may not affect the vehicle’s drivability, the inability to use the rear wiper can pose safety risks in adverse weather conditions. It is advisable to address this issue promptly to ensure proper visibility and safety while driving.

How to diagnose DTC B1612

To diagnose DTC B1612, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Inspect the rear wiper mode select switch for physical damage or wear.
3. Check the wiring and connectors for signs of corrosion, damage, or loose connections.
4. Test the continuity of the circuit using a multimeter.
5. Examine the body control module for any faults or issues.

How to fix DTC B1612 step-by-step instructions

To fix DTC B1612, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and replace the rear wiper mode select switch if it is found to be faulty.
3. Repair or replace any damaged wiring or connectors in the circuit.
4. Clean any corrosion from connectors and ensure all connections are secure.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the rear wiper operation to ensure the issue is resolved.

How to erase DTC B1612

To erase DTC B1612, 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 code does not reappear.

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