AutoCodes – Chevrolet – B3655 Chevrolet

B3655 Chevrolet Code - Electrical Power Take Off Control Switch Circuit Low

Quick Answer

The Auxiliary Power Outlet (APO) Switch controls the operation of the Hybrid Control Module (HCM) APO state manager. Common causes include Faulty Auxiliary Power Outlet (APO) Switch, Auxiliary Power Outlet (APO) Switch harness is open or shorted, Auxiliary Power Outlet (APO) 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: B3655 Chevrolet indicates Electrical Power Take Off Control Switch Circuit Low.
Common causes: Common causes include Faulty Auxiliary Power Outlet (APO) Switch, Auxiliary Power Outlet (APO) Switch harness is open or shorted, Auxiliary Power Outlet (APO) 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 495

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 Mar 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3655 Chevrolet Description

The Auxiliary Power Outlet (APO) Switch controls the operation of the Hybrid Control Module (HCM) APO state manager. The APO state manager commands one of three states from the Starter Generator Control Module (SGCM) (APO Off, APO Normal, APO Continuous). The APO switch is a momentary button, its output signal an input to an HCM analogue channel. Five volts are supplied to the switch and the returned voltage is measured relative to HCM signal ground to determine the switch state. A resistor network in the switch circuitry ensures that shorted high and low states can be diagnosed successfully. There are 2 valid voltage ranges of the return signal, one representing switch open, the other representing switch closed. If the voltage is lower than a threshold, a short low is indicated. Similarly, if the voltage is greater than the short high threshold, a short 'high' is indicated. The Diagnostic Trouble Code (DTC) sets if voltage is lower than a calibrated value, a short low is indicated or if the voltage is greater than a calibrated value the short high is indicated.

OBDII Code B3655 Chevrolet - Electrical Power Take Off Control Switch Circuit Low - AutoCodes.com — B3655 Chevrolet Code - Electrical Power Take Off Control Switch Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3655 Chevrolet?

Faulty Auxiliary Power Outlet (APO) Switch
Auxiliary Power Outlet (APO) Switch harness is open or shorted
Auxiliary Power Outlet (APO) Switch circuit poor electrical connection
Faulty Hybrid Control Module (HCM)

How to Fix the DTC B3655 Chevrolet?

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 B3655 Chevrolet 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 B3655 Chevrolet Code

1. What are the common symptoms of OBDII code B3655 in a Chevrolet related to the Electrical Power Take Off Control Switch Circuit Low?

- Common symptoms include the illumination of the Check Engine Light, difficulty engaging the power take-off (PTO) system, and potential loss of functionality in PTO-related systems.

2. What are the possible causes of the OBDII code B3655 in a Chevrolet?

- The code B3655 may be triggered by issues such as a faulty power take-off control switch, damaged wiring or connectors in the circuit, or a malfunctioning PTO module.

3. How can I diagnose the cause of the Electrical Power Take Off Control Switch Circuit Low code in my Chevrolet?

- To diagnose the issue, you can perform a visual inspection of the wiring and connectors, test the power take-off control switch for proper functionality, and use a diagnostic scanner to read the fault codes and monitor system parameters.

4. Can a DIY enthusiast repair the B3655 OBDII code in a Chevrolet?

- Depending on the cause, DIY repairs may be possible. Simple fixes like replacing a faulty switch or repairing damaged wiring can often be done at home with basic tools and some technical knowledge.

5. Is it safe to continue driving my Chevrolet with the B3655 code present?

- It's not recommended to drive with the B3655 code active, as it can lead to potential issues with the power take-off system and affect the vehicle's performance. It's best to address the underlying problem promptly.

6. How much does it typically cost to repair the Electrical Power Take Off Control Switch Circuit Low issue in a Chevrolet?

- Repair costs can vary depending on the exact cause of the problem and whether you opt for DIY repairs or professional assistance. Costs may range from a few dollars for simple fixes to a few hundred dollars for more complex repairs.

7. Can a low battery voltage trigger the B3655 code in a Chevrolet?

- Yes, low battery voltage can sometimes cause the B3655 code to appear. Ensure your vehicle's battery is in good condition and properly charged before diagnosing the issue further.

8. Are there any preventive maintenance tips to avoid the recurrence of the B3655 OBDII code in a Chevrolet?

- Regularly inspecting and maintaining the power take-off system, checking wiring connections, and ensuring the control switch is functioning properly can help prevent the reoccurrence of the B3655 code.

9. Does resetting the OBDII system clear the B3655 code in a Chevrolet?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause of the problem.

10. How long does it take to repair the Electrical Power Take Off Control Switch Circuit Low in a Chevrolet?

- The repair time can vary based on the specific cause of the issue and the complexity of the repair. Simple fixes may take a short amount of time, while more intricate repairs could require several hours or a day at a repair shop.