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C1917 Lexus Code - Rear Active Stabilizer Control ECU CAN Communication Stop

Quick Answer

The C1917 diagnostic trouble code (DTC) for Lexus vehicles indicates a communication error between the Rear Active Stabilizer Control Electronic Control Unit (ECU) and the Controller Area Network (CAN) bus system. Common causes include Damaged or corroded wiring harness connecting the ECU to the CAN bus, Faulty Rear Active Stabilizer Control ECU, Issues with the CAN bus communication network. 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
C1917 Lexus indicates Rear Active Stabilizer Control ECU CAN Communication Stop.
Common causes
Common causes include Damaged or corroded wiring harness connecting the ECU to the CAN bus, Faulty Rear Active Stabilizer Control ECU, Issues with the CAN bus communication network.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code C1917 Lexus Description

The C1917 diagnostic trouble code (DTC) for Lexus vehicles indicates a communication error between the Rear Active Stabilizer Control Electronic Control Unit (ECU) and the Controller Area Network (CAN) bus system. The Rear Active Stabilizer System is responsible for enhancing vehicle stability and handling by adjusting the suspension settings based on driving conditions. When communication between the ECU and the CAN bus is interrupted, it can lead to a loss of control over the rear stabilizer system, potentially compromising the vehicle's handling and ride comfort.

OBDII Code C1917 Lexus - Rear Active Stabilizer Control ECU CAN Communication Stop
C1917 Lexus Code - Rear Active Stabilizer Control ECU CAN Communication Stop

Common Causes of C1917 Lexus

  1. Damaged or corroded wiring harness connecting the ECU to the CAN bus.
  2. Faulty Rear Active Stabilizer Control ECU.
  3. Issues with the CAN bus communication network.
  4. Water intrusion or moisture affecting the ECU connections.
  5. Electrical system malfunctions or short circuits.

Symptoms of C1917 Lexus

  1. Illumination of the stability control warning light on the dashboard.
  2. Unusual noises coming from the rear suspension.
  3. Uneven handling or a feeling of instability while driving.
  4. Inability to adjust the rear stabilizer settings using the vehicle's controls.
  5. Harsh ride quality or excessive body roll during cornering.

How to Fix C1917 Lexus

  1. Begin by conducting a thorough inspection of the wiring harness connecting the Rear Active Stabilizer Control ECU to the CAN bus. Look for any signs of damage, corrosion, or loose connections. Repair or replace any faulty wiring as needed.
  2. Check the Rear Active Stabilizer Control ECU for proper functionality. If the ECU is found to be faulty, replace it with a new unit and reprogram it to the vehicle's specifications.
  3. Verify the integrity of the CAN bus communication network by checking for any loose connections or damaged components. Repair or replace any faulty CAN bus components.
  4. Clear the DTC from the vehicle's memory using a diagnostic scan tool and perform a test drive to ensure that the issue has been resolved.
  5. If the problem persists, consult a professional technician or dealership for further diagnosis and repair.

Cost to Fix C1917 Lexus

The typical repair costs for addressing the C1917 code on a Lexus vehicle can vary depending on the specific cause of the issue and the parts/labour involved. In general, repairing wiring harnesses or replacing the Rear Active Stabilizer Control ECU can range from $300 to $800, including parts and labour. However, additional diagnostic time and labour rates at auto repair shops can influence the final cost. It's recommended to consult with local repair shops or dealerships for a more accurate estimate based on your vehicle's make and model.

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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 C1917 Lexus Code

1. What does the OBDII code C1917 mean for a Lexus?

C1917 indicates that the Rear Active Stabilizer Control ECU has stopped communicating via the Controller Area Network (CAN).

2. What are common symptoms of the C1917 code in a Lexus?

Symptoms include a malfunction indicator light (MIL), reduced vehicle stability, poor handling, or suspension warnings on the dashboard.

3. What causes the C1917 code to appear in a Lexus?

Common causes include a faulty Rear Active Stabilizer Control ECU, damaged wiring or connectors, or a failure in the CAN communication network.

4. Can a loose connection trigger the C1917 code?

Yes, loose or corroded connections in the wiring harness or ECU connectors can interrupt communication and trigger the code.

5. How do you diagnose the C1917 code in a Lexus?

Diagnosis involves scanning the vehicle with an OBDII tool, inspecting the CAN network wiring, and testing the Rear Active Stabilizer Control ECU for proper operation.

6. Can driving with the C1917 code cause further damage?

Driving may not cause immediate damage but could compromise vehicle stability and safety, especially in sharp turns or emergency maneuvers.

7. Is replacing the Rear Active Stabilizer Control ECU always necessary for the C1917 code?

Not always; the issue could be due to wiring faults or poor connections. Proper diagnosis is necessary before replacing the ECU.

8. How much does it cost to fix the C1917 code in a Lexus?

Repair costs vary depending on the issue, ranging from $100-200 for wiring repairs to $500-1000+ if the ECU needs replacement.

9. Can updating the ECU software resolve the C1917 code?

In some cases, a software update may fix communication issues if the ECU is functional but has outdated programming.

10. What tools are needed to troubleshoot the C1917 code?

You’ll need an OBDII scanner that can read Lexus-specific codes, a multimeter for wiring checks, and possibly an oscilloscope to test the CAN network.

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