AutoCodes – Scion – C1428 Scion

C1428 Scion Code - Actuator Pump Motor Circuit Malfunction

Quick Answer

The Motor Relay and motor fail-safe relay are built into the Brake Actuator Assembly. Common causes include Faulty Skid Control ECU (Brake Actuator Assembly), Skid Control ECU harness is open or shorted, Skid Control ECU 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: C1428 Scion indicates Actuator Pump Motor Circuit Malfunction.
Common causes: Common causes include Faulty Skid Control ECU (Brake Actuator Assembly), Skid Control ECU harness is open or shorted, Skid Control ECU 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 1,003

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jan 29, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1428 Scion Description

The Motor Relay and motor fail-safe relay are built into the Brake Actuator Assembly. During ABS, TRAC, VSC, brake hold, or brake assist operation, the Skid Control ECU (Brake Actuator Assembly) turns on the motor relay to run the pump motor in the Brake Actuator Assembly. When a motor system Diagnostic Trouble Code (DTC) is stored, the motor fail-safe relay cuts the power source supply to the motor relay for fail-safe operation.
This DTC may be stored when the voltage to the motor relay power source is lower than the DTC detection condition due to low output from the battery or alternator.

OBDII Code C1428 Scion - Actuator Pump Motor Circuit Malfunction - AutoCodes.com — C1428 Scion Code - Actuator Pump Motor Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC C1428 Scion?

Faulty Skid Control ECU (Brake Actuator Assembly)
Skid Control ECU harness is open or shorted
Skid Control ECU circuit poor electrical connection

How to Fix the DTC C1428 Scion?

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 C1428 Scion 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.

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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 C1428 Scion Code

What does the OBDII code C1428 mean for a Scion?

The OBDII code C1428 indicates a malfunction in the actuator pump motor circuit, which is part of the vehicle's anti-lock braking system (ABS).

What are the common symptoms associated with the C1428 code?

Common symptoms include the ABS warning light illuminating on the dashboard, reduced braking performance, and possible erratic ABS operation.

What could cause the C1428 code to trigger?

Causes may include a faulty actuator pump motor, damaged wiring or connectors in the circuit, or issues with the ABS control module.

How can I diagnose the C1428 code?

To diagnose the C1428 code, use an OBDII scanner to confirm the code, visually inspect the wiring and connectors, and test the actuator pump motor for proper operation.

What repairs are typically needed for the C1428 code?

Repairs may involve replacing the actuator pump motor, repairing or replacing damaged wiring, or addressing issues with the ABS control module.

Can I drive my Scion with the C1428 code active?

While it may be possible to drive the vehicle, it is not recommended, as it could lead to compromised braking performance and safety concerns.

How much does it typically cost to fix the C1428 code?

Repair costs can vary widely depending on the cause, but replacing the actuator pump motor can range from $300 to $800, including parts and labor.

Is the C1428 code a common issue in Scion vehicles?

While not the most common OBDII code, the C1428 code can occur in Scion vehicles, particularly in older models or those with high mileage.

Will clearing the C1428 code fix the problem?

Clearing the code may temporarily turn off the warning light, but it will not resolve the underlying issue. The code will likely reappear if the problem is not fixed.