B1633 – OBD-II DTC

OBD-II DTC B1633 – Mirror Driver Left Circuit Short To Battery

DTC B1633 meaning

DTC B1633 refers to a diagnostic trouble code indicating a short circuit in the left driver mirror circuit to the battery. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components for faults. When the system detects an abnormal voltage or current flow in the left mirror circuit, it triggers this code, signaling a potential electrical issue that needs attention.

DTC B1633 symptoms

Common symptoms associated with DTC B1633 may include:

• Left side mirror not functioning or responding.
• Mirror adjustment controls may be unresponsive.
• Possible warning lights on the dashboard related to electrical issues.
• Intermittent or erratic operation of the left mirror.

DTC B1633 causes

Several factors can lead to the triggering of DTC B1633, including:

• Wiring issues such as frayed or damaged wires in the mirror circuit.
• Faulty mirror motor or internal components.
• Corrosion or poor connections at the mirror or control switch.
• Short circuits caused by moisture intrusion or foreign objects.
• Malfunctioning control module that manages the mirror functions.

DTC B1633 seriousness

The seriousness of DTC B1633 can vary based on the specific symptoms and the vehicle’s overall condition. While it may not pose an immediate safety risk, a malfunctioning mirror can hinder visibility and affect driving safety. It is advisable to address this issue promptly to ensure proper vehicle operation and safety.

How to diagnose DTC B1633

To diagnose DTC B1633, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1633 code.
2. Inspect the wiring and connectors related to the left driver mirror for any visible damage or corrosion.
3. Test the mirror motor for functionality using a multimeter.
4. Check for any additional codes that may indicate related issues.
5. Perform a continuity test on the mirror circuit to identify any shorts to battery.

How to fix DTC B1633 step-by-step instructions

To fix DTC B1633, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and repair any damaged wiring or connectors in the left mirror circuit.
3. Replace the mirror motor if it is found to be faulty during testing.
4. Clean any corroded connections to ensure proper electrical contact.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the left mirror functionality to ensure the issue is resolved.

How to erase DTC B1633

To erase DTC B1633, 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 trouble codes section on the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to indicate that the codes have been cleared.
6. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.