AutoCodes – Toyota – C1252 Toyota

C1252 Toyota Code - Brake Booster Pump Motor ON Time Abnormally Long

Quick Answer

The Skid Control ECU detects decreases in the accumulator pressure according to the data from the accumulator pressure sensor, and then starts and stops the pump motor by operating the motor relay. Common causes include Faulty Brake Actuator Assembly, Brake Actuator Assembly harness is open or shorted, Brake Actuator Assembly circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: C1252 Toyota indicates Brake Booster Pump Motor ON Time Abnormally Long.
Common causes: Common causes include Faulty Brake Actuator Assembly, Brake Actuator Assembly harness is open or shorted, Brake Actuator Assembly circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 41,221

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1252 Toyota Description

The Skid Control ECU detects decreases in the accumulator pressure according to the data from the accumulator pressure sensor, and then starts and stops the pump motor by operating the motor relay. The Skid Control ECU usually drives the motor relay 1 for ECB control, and the motor relay 2 for ABS control. If either is malfunctioning, the other substitutes.

OBDII Code C1252 Toyota - Brake Booster Pump Motor ON Time Abnormally Long - AutoCodes.com — C1252 Toyota Code - Brake Booster Pump Motor ON Time Abnormally Long

What does this mean?

What are the Possible Causes of the DTC C1252 Toyota?

Faulty Brake Actuator Assembly
Brake Actuator Assembly harness is open or shorted
Brake Actuator Assembly circuit poor electrical connection

How to Fix the DTC C1252 Toyota?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1252 Toyota code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C1252 Toyota code?

Need more information on how to fix the C1252 Toyota code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1252 Toyota Code

1. What are the common symptoms of OBDII code C1252 in a Toyota related to the Brake Booster Pump Motor ON Time Abnormally Long?

- Common symptoms include the brake pedal feeling hard or stiff, the brake booster pump running excessively, and the ABS warning light illuminating on the dashboard.

2. What are the possible causes of OBDII code C1252 in a Toyota indicating the Brake Booster Pump Motor ON Time Abnormally Long?

- Causes may include a faulty brake booster pump motor, a malfunctioning brake booster pump relay, or issues with the brake booster pump control module.

3. How can I diagnose OBDII code C1252 in a Toyota for the Brake Booster Pump Motor ON Time Abnormally Long?

- Diagnostic steps involve checking the brake booster pump motor for proper operation, inspecting the relay and control module, and verifying the wiring connections for any issues.

4. What are the recommended repair tips for resolving OBDII code C1252 in a Toyota related to the Brake Booster Pump Motor ON Time Abnormally Long?

- Repair tips may include replacing the faulty brake booster pump motor, testing and replacing the relay if needed, and ensuring all wiring connections are secure and free of damage.

5. Can OBDII code C1252 in a Toyota indicating the Brake Booster Pump Motor ON Time Abnormally Long affect vehicle safety?

- Yes, this code can impact safety as it may lead to reduced brake assist functionality, potentially affecting the vehicle's braking performance under certain conditions.

6. Is it safe to continue driving with OBDII code C1252 in a Toyota for the Brake Booster Pump Motor ON Time Abnormally Long present?

- It is not recommended to drive the vehicle with this code active, as it can compromise the effectiveness of the brake system and pose a safety risk. Immediate attention and repair are advised.

7. How long does it typically take to repair OBDII code C1252 in a Toyota related to the Brake Booster Pump Motor ON Time Abnormally Long?

- The repair time can vary depending on the exact cause of the issue, but it may take a few hours to a full day to diagnose, replace components, and ensure proper functionality of the brake system.

8. Are there any preventive measures to avoid encountering OBDII code C1252 in a Toyota for the Brake Booster Pump Motor ON Time Abnormally Long in the future?

- Regular maintenance, including checking the brake system components for wear and tear, can help prevent issues that may trigger this code. Promptly addressing any brake-related symptoms is also crucial.