AutoCodes – Toyota – P1630 Toyota

P1630 Toyota Code - Communication Error from VSC to ECM

Quick Answer

The Skid Control Electronic Control Unit (ECU) sends signals such as cruise control cancel demand signals and brake operation demand from Engine Control Module (ECM) response signals to the ECM when the cruise control system is in operation. 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: P1630 Toyota indicates Communication Error from VSC to ECM.
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 9,753

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 Mar 28, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1630 Toyota Description

The Skid Control Electronic Control Unit (ECU) sends signals such as cruise control cancel demand signals and brake operation demand from Engine Control Module (ECM) response signals to the ECM when the cruise control system is in operation. While the vehicle speed is 40 km/h (25 mph) or more and the dynamic radar cruise control system is operating (vehicle-to-vehicle distance control mode) if communication data from the skid control ECU (brake actuator assembly) is logically inconsistent for approximately 0.5 seconds or more the Diagnostic Trouble Code (DTC) will be set.

OBDII Code P1630 Toyota - Communication Error from VSC to ECM - AutoCodes.com — P1630 Toyota Code - Communication Error from VSC to ECM

What does this mean?

What are the Possible Causes of the DTC P1630 Toyota?

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

How to Fix the DTC P1630 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 P1630 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 P1630 Toyota code?

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Information for Specific Toyota Models

P1630 2013 Toyota RAV4 — Communication Error from VSC to ECM
P1630 2014 Toyota RAV4 — Communication Error from VSC to ECM
P1630 2015 Toyota RAV4 — Communication Error from VSC to ECM
P1630 2016 Toyota RAV4 — Communication Error from VSC to ECM
P1630 2017 Toyota RAV4 — Communication Error from VSC to ECM
P1630 2018 Toyota RAV4 — Communication Error from VSC to ECM

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.