C1186 – OBD-II DTC

OBD-II DTC C1186 – ABS Power Relay Output Open Circuit

DTC C1186 meaning

DTC C1186 refers to an issue with the Anti-lock Braking System (ABS) related to the power relay output. Specifically, it indicates that there is an open circuit in the ABS power relay output circuit. This means that the relay responsible for supplying power to the ABS module is not functioning correctly, which can lead to a failure in the ABS system.

DTC C1186 symptoms

Common symptoms associated with DTC C1186 may include:

• Illumination of the ABS warning light on the dashboard
• Loss of ABS functionality during braking
• Increased stopping distances
• Potential activation of the traction control warning light

DTC C1186 causes

Several factors can lead to the occurrence of DTC C1186, including:

• Faulty ABS power relay
• Wiring issues such as frayed or broken wires
• Corrosion or poor connections in the relay circuit
• Defective ABS control module
• Blown fuses related to the ABS system

DTC C1186 seriousness

DTC C1186 is considered a serious issue as it directly affects the functionality of the ABS system. Without a functioning ABS, the vehicle may experience:

• Reduced braking effectiveness
• Increased risk of skidding during emergency braking
• Potential loss of vehicle control

It is crucial to address this code promptly to ensure safe vehicle operation.

How to diagnose DTC C1186

To diagnose DTC C1186, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1186 code.
2. Inspect the ABS power relay for any visible signs of damage or corrosion.
3. Check the wiring and connectors associated with the ABS power relay for continuity and integrity.
4. Test the ABS power relay using a multimeter to ensure it is functioning correctly.
5. Examine the ABS control module for any faults or issues.
6. Clear the DTC and perform a road test to see if the code returns.

How to fix DTC C1186 step-by-step instructions

To fix DTC C1186, follow these steps:

1. Identify and replace any faulty ABS power relay.
2. Repair or replace damaged wiring or connectors in the ABS power relay circuit.
3. Clean any corrosion found on connectors and ensure secure connections.
4. Replace the ABS control module if it is determined to be defective.
5. Check and replace any blown fuses related to the ABS system.
6. After repairs, clear the DTC using an OBD-II scanner.
7. Perform a road test to confirm that the ABS system is functioning properly and that the DTC does not return.

How to erase DTC C1186

To erase DTC C1186, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Access the diagnostic menu on the scanner and select the option to clear or erase trouble 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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