C1A73 Toyota Code - Driving Support ECU Receive Data Malfunction
Quick Answer
If a communication error between the Driving Support ECU Assembly and another ECU is detected, Diagnostic Trouble Code (DTC) C1A73 is stored. Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Forward Recognition Camera, Faulty Driving Support ECU Assembly. 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
- C1A73 Toyota indicates Driving Support ECU Receive Data Malfunction.
- Common causes
- Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Forward Recognition Camera, Faulty Driving Support ECU Assembly.
- 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.
Code C1A73 Toyota Description
What are the Possible Causes of the DTC C1A73 Toyota?
- Faulty Controller Area Network (CAN) Communication System
- Faulty Forward Recognition Camera
- Faulty Driving Support ECU Assembly
How to Fix the DTC C1A73 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.
Code Tech Notes
If the Forward Recognition Camera has been replaced with a new one, be sure to perform Forward Recognition Camera learning.
When replacing the Driving Support ECU Assembly, always replace it with a new one. If a Driving Support ECU Assembly which was installed in another vehicle is used, the information stored in the Driving Support ECU Assembly will not match the information from the vehicle. As a result, a DTC may be stored.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1A73 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.
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Information for Specific Toyota Models
- C1A73 2013 Toyota RAV4 — Driving Support ECU Receive Data Malfunction
- C1A73 2014 Toyota RAV4 — Driving Support ECU Receive Data Malfunction
- C1A73 2015 Toyota RAV4 — Driving Support ECU Receive Data Malfunction
- C1A73 2016 Toyota RAV4 — Driving Support ECU Receive Data Malfunction
- C1A73 2017 Toyota RAV4 — Driving Support ECU Receive Data Malfunction
- C1A73 2018 Toyota RAV4 — Driving Support ECU Receive Data Malfunction
Frequently Asked Questions about C1A73 Toyota Code
What does OBDII code C1A73 mean in a Toyota?
Code C1A73 indicates a "Driving Support ECU Receive Data Malfunction," which means there is an issue with the communication between the Driving Support ECU and other systems in the vehicle.
What are the common symptoms of code C1A73 in a Toyota?
Symptoms may include malfunctioning driver assistance features like adaptive cruise control, lane-keeping assist, or pre-collision systems, as well as warning lights on the dashboard.
What causes code C1A73 in Toyota vehicles?
Typical causes include wiring or connector issues, a faulty Driving Support ECU, software glitches, or communication errors between related ECUs.
How can I diagnose code C1A73 in my Toyota?
Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting wiring and connectors for damage, and testing the Driving Support ECU for proper functionality.
Can a weak battery cause code C1A73 in a Toyota?
Yes, a weak or failing battery can disrupt communication between ECUs, potentially triggering this code.
Is it safe to drive with code C1A73 in a Toyota?
Driving may be safe, but driver assistance features may not function correctly, which could increase the risk of accidents in certain conditions.
How do I fix code C1A73 in a Toyota?
Repairs might include fixing damaged wiring, replacing faulty connectors, updating ECU software, or replacing the Driving Support ECU if necessary.
Does code C1A73 require ECU replacement in all cases?
Not necessarily. Many issues can be resolved by repairing wiring or updating the software without replacing the ECU.
Can code C1A73 be cleared without fixing the underlying issue?
Clearing the code without addressing the problem may result in the code returning or continued malfunction of driver assistance features.
What tools are needed to troubleshoot code C1A73 in a Toyota?
You’ll need an OBDII scanner, a multimeter for electrical testing, and possibly Toyota-specific diagnostic tools for ECU communication tests.
Discuss the causes and fixes for C1A73 Toyota OBDII Code
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