AutoCodes – Generic – B1593

B1593 Code - Autolamp Delay Decrease Circuit Short To Battery

Quick Answer

The Body Control Module (BCM) monitors the Autolamp Delay. Common causes include Faulty Autolamp Delay, Autolamp Delay harness is open or shorted, Autolamp Delay 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: B1593 indicates Autolamp Delay Decrease Circuit Short To Battery.
Common causes: Common causes include Faulty Autolamp Delay, Autolamp Delay harness is open or shorted, Autolamp Delay 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 4,585

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1593 Description

The Body Control Module (BCM) monitors the Autolamp Delay. The BCM sets the OBDII code when the Autolamp Delay is not to factory specifications.

OBDII Code B1593 - Autolamp Delay Decrease Circuit Short To Battery - AutoCodes.com — B1593 Code - Autolamp Delay Decrease Circuit Short To Battery

What does this mean?

What are the Possible Causes of the DTC B1593?

Faulty Autolamp Delay
Autolamp Delay harness is open or shorted
Autolamp Delay circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1593?

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 B1593 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 B1593 code?

Need more information on how to fix the B1593 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1593 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1593 Lexus — No Response From Stereo Component Amplifier
B1593 Toyota — No Response From Stereo Component Amplifier

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 B1593 Code

1. What are the common symptoms of OBDII code B1593 (Autolamp Delay Decrease Circuit Short To Battery)?

- Common symptoms include the autolamp delay function not working, interior lights staying on, and draining of the vehicle's battery.

2. What are the possible causes of OBDII code B1593?

- The code B1593 can be caused by a short circuit in the autolamp delay decrease circuit, faulty wiring, or a malfunctioning autolamp delay module.

3. How can I diagnose OBDII code B1593?

- Diagnosis typically involves inspecting the wiring related to the autolamp delay system, checking for any visible damage or short circuits, and using a multimeter to test for continuity.

4. Can OBDII code B1593 be a safety concern?

- While the code itself does not pose an immediate safety risk, the malfunctioning autolamp delay system can lead to battery drainage and difficulties with interior lighting, affecting nighttime visibility.

5. How can I repair OBDII code B1593?

- Repair involves identifying and fixing the short circuit in the autolamp delay decrease circuit, repairing or replacing any damaged wiring, and resetting the fault code using an OBDII scanner.

6. Is it possible to prevent OBDII code B1593 from recurring?

- Regularly inspecting the autolamp delay system wiring for damage, ensuring proper installation of components, and avoiding water damage can help prevent the code from recurring.

7. Can I continue driving with OBDII code B1593 present?

- It is generally safe to drive with the code present, but it is recommended to address the issue promptly to avoid potential battery drainage or lighting problems.

8. Will resetting the OBDII code B1593 fix the issue permanently?

- Resetting the code may temporarily clear the fault, but if the underlying issue, such as a short circuit, is not addressed, the code is likely to reappear.

9. Can a DIY enthusiast repair OBDII code B1593, or is professional help recommended?

- Repairing OBDII code B1593 may be feasible for DIY enthusiasts with experience in automotive electrical systems, but professional help is recommended for those unfamiliar with troubleshooting wiring issues.

10. How long does it typically take to repair OBDII code B1593?

- The repair time for OBDII code B1593 can vary depending on the extent of the wiring damage and the complexity of the autolamp delay system, but it may take a few hours to half a day to complete the repair.