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C1924 Lexus Code - Short In Rear Motor Driver Circuit

Quick Answer

The C1924 diagnostic trouble code (DTC) for Lexus vehicles indicates a short in the rear motor driver circuit. Common causes include Damaged wiring or connectors in the rear motor driver circuit, Faulty rear motor or motor controller, Water intrusion into the rear motor driver circuit. 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
C1924 Lexus indicates Short In Rear Motor Driver Circuit.
Common causes
Common causes include Damaged wiring or connectors in the rear motor driver circuit, Faulty rear motor or motor controller, Water intrusion into the rear motor driver circuit.
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 14, 2024
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Code C1924 Lexus Description

The C1924 diagnostic trouble code (DTC) for Lexus vehicles indicates a short in the rear motor driver circuit. This code specifically relates to an issue with the circuit that controls the rear motor, which could be part of systems such as the power liftgate, rear window wiper, or rear window defroster. When this circuit experiences a short, it can lead to malfunctions in these components, affecting the vehicle's overall performance and functionality.

OBDII Code C1924 Lexus - Short In Rear Motor Driver Circuit
C1924 Lexus Code - Short In Rear Motor Driver Circuit

Common Causes of C1924 Lexus

  1. Damaged wiring or connectors in the rear motor driver circuit.
  2. Faulty rear motor or motor controller.
  3. Water intrusion into the rear motor driver circuit.
  4. Short circuit in the electrical system.
  5. Overloading the rear motor driver circuit with excessive current.

Symptoms of C1924 Lexus

  1. Power liftgate fails to open or close.
  2. Rear window wiper does not function.
  3. Rear window defroster does not clear fog or frost.
  4. Fuse for rear motor driver circuit keeps blowing.
  5. Electrical burning smell in the rear of the vehicle.

How to Fix C1924 Lexus

  1. Begin by conducting a thorough visual inspection of the rear motor driver circuit, checking for any obvious signs of damage such as frayed wires or corroded connectors.
  2. Use a multimeter to test the continuity of the wiring in the circuit and identify any shorts or open circuits.
  3. Inspect the rear motor and motor controller for proper operation, testing for voltage and current flow as needed.
  4. Replace any damaged wiring, connectors, or components in the rear motor driver circuit.
  5. Clear any fault codes stored in the vehicle's computer system and test the repaired circuit to ensure proper functionality.

Cost to Fix C1924 Lexus

The cost of repairing a short in the rear motor driver circuit can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the repair for this issue could range from $200 to $500, including parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can fluctuate based on factors such as location, vehicle make and model, and engine type. Rates typically range from $80 to $150 per hour, with higher rates in metropolitan areas or at dealerships and lower rates at independent shops. For a more accurate estimate, it's recommended to obtain quotes from local auto repair facilities.

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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 C1924 Lexus Code

1. What are the common symptoms of OBDII code C1924 (Lexus) Short In Rear Motor Driver Circuit?

- Common symptoms include issues with the electronic stability control system, traction control system malfunction, and potentially a disabled ABS system.

2. What are the possible causes of OBDII code C1924 (Lexus) Short In Rear Motor Driver Circuit?

- The code can be triggered by a short circuit in the wiring harness, a faulty rear motor driver circuit, or a malfunctioning electronic control unit (ECU).

3. How can I diagnose the OBDII code C1924 (Lexus) Short In Rear Motor Driver Circuit?

- Diagnosis typically involves using a professional OBDII scanner to read the error code, inspecting the wiring harness for visible damage, and conducting a thorough circuit test.

4. Can I drive my Lexus with the OBDII code C1924 (Short In Rear Motor Driver Circuit) active?

- It is not recommended to drive your vehicle with this code active, as it can affect the performance of critical safety systems like ABS and traction control.

5. How can I repair OBDII code C1924 (Lexus) Short In Rear Motor Driver Circuit?

- Repair options include fixing any damaged wiring, replacing the rear motor driver circuit if necessary, or reprogramming the ECU to clear the error code.

6. Will resetting the OBDII code C1924 (Lexus) Short In Rear Motor Driver Circuit make the problem go away?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the error code to appear.

7. Is it safe to continue driving my Lexus if the OBDII code C1924 (Lexus) Short In Rear Motor Driver Circuit keeps coming back after repairs?

- It is not safe to ignore recurring instances of this error code, as it indicates a persistent issue with the rear motor driver circuit that needs to be properly addressed.

8. Can extreme weather conditions trigger the OBDII code C1924 (Lexus) Short In Rear Motor Driver Circuit?

- Extreme weather conditions can potentially exacerbate existing wiring or circuit issues, leading to the activation of this error code.

9. How long does it typically take to repair OBDII code C1924 (Lexus) Short In Rear Motor Driver Circuit?

- The repair time can vary depending on the extent of the damage and the availability of replacement parts, but it is advisable to address the issue promptly.

10. Are there any preventative measures I can take to avoid OBDII code C1924 (Lexus) Short In Rear Motor Driver Circuit in the future?

- Regular maintenance checks, avoiding water damage to the vehicle's electrical components, and addressing any wiring issues promptly can help prevent the recurrence of this error code.

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