AutoCodes – Buick – B3604 Buick

B3604 Buick Code - Adjustable Pedal Forward Switch Circuit Protection Time-Out

Quick Answer

Ground is supplied at all times to the adjustable pedal switch. Common causes include Faulty Adjustable Pedal Forward Switch, Adjustable Pedal Forward Switch harness is open or shorted, Adjustable Pedal Forward Switch 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: B3604 Buick indicates Adjustable Pedal Forward Switch Circuit Protection Time-Out.
Common causes: Common causes include Faulty Adjustable Pedal Forward Switch, Adjustable Pedal Forward Switch harness is open or shorted, Adjustable Pedal Forward Switch 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 521

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 Jun 14, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3604 Buick Description

Ground is supplied at all times to the adjustable pedal switch. The adjustable pedal forward and rearward switches are inputs to the seat memory control module. When the switch is operated to the forward or rearward direction, it supplies a ground path for the signal inputs from the seat memory control module. The seat memory control module then commands the adjustable pedals motor to move in response to the switch signal. The Diagnostic Trouble Code (DTC) will be set when the seat memory control module detects short to ground in the forward signal circuit for greater than 60 s.

OBDII Code B3604 Buick - Adjustable Pedal Forward Switch Circuit Protection Time-Out - AutoCodes.com — B3604 Buick Code - Adjustable Pedal Forward Switch Circuit Protection Time-Out

What does this mean?

What are the Possible Causes of the DTC B3604 Buick?

Faulty Adjustable Pedal Forward Switch
Adjustable Pedal Forward Switch harness is open or shorted
Adjustable Pedal Forward Switch circuit poor electrical connection
Faulty Driver Seat Memory Control Module

How to Fix the DTC B3604 Buick?

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 B3604 Buick 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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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 B3604 Buick Code

1. What does the OBDII code B3604 mean on a Buick?

The code B3604 indicates an issue with the Adjustable Pedal Forward Switch Circuit Protection Time-Out, meaning the system detected a fault in the adjustable pedal forward switch's operation.

2. What are common symptoms of the B3604 code?

Symptoms may include the adjustable pedals not moving forward, a malfunction indicator light on the dashboard, or no response when using the pedal adjustment switch.

3. What causes the B3604 code in a Buick?

Common causes include a faulty pedal adjustment switch, damaged wiring or connectors, or a malfunction in the pedal adjustment motor.

4. Can I still drive my Buick with the B3604 code active?

Yes, you can still drive the vehicle, but the adjustable pedal feature may not work properly, which could affect driving comfort or safety in some cases.

5. How do I diagnose the B3604 code on my Buick?

Diagnosis involves inspecting the pedal adjustment switch, testing the circuit for continuity or shorts, and checking the motor and related wiring for damage.

6. What are some possible repairs for the B3604 code?

Repairs may include replacing the pedal adjustment switch, repairing or replacing damaged wiring, or replacing the adjustable pedal motor if it's malfunctioning.

7. How much does it cost to fix the B3604 code on a Buick?

Costs vary depending on the exact issue; replacing a switch or repairing wiring typically costs less than replacing the adjustable pedal motor, which can be more expensive.

8. Can I fix the B3604 code myself?

If you're comfortable with basic electrical troubleshooting and have the necessary tools, you may be able to repair wiring or replace the switch yourself. For more complex issues, professional help is recommended.

9. What tools are needed to troubleshoot the B3604 code?

Tools may include a multimeter for electrical testing, a scan tool for reading and clearing codes, and basic hand tools for accessing components.

10. Will clearing the B3604 code solve the problem?

Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return. Proper diagnosis and repair are necessary.