AutoCodes – Saturn – B370B Saturn

B370B Saturn Code - Rear Wiper Function Control Circuit Short to Ground

Quick Answer

The Body Control Module (BCM) controls the single speed rear wiper motor by its active high output to the external rear wiper motor relay. Common causes include Faulty Rear Window Wiper Motor, Rear Window Wiper Motor harness is open or shorted, Rear Window Wiper Motor 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: B370B Saturn indicates Rear Wiper Function Control Circuit Short to Ground.
Common causes: Common causes include Faulty Rear Window Wiper Motor, Rear Window Wiper Motor harness is open or shorted, Rear Window Wiper Motor 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 512

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 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B370B Saturn Description

The Body Control Module (BCM) controls the single speed rear wiper motor by its active high output to the external rear wiper motor relay. When the BCM activates its output and applies battery to the coil of the relay, the relay energizes, allowing battery voltage from the fuse to be applied through the switched contacts of the rear wiper motor relay to the control input of the rear wiper motor. The motor then operates continuously at low speed. The Diagnostic Trouble Code (DTC) sets if a short to ground or an open/high resistance is detected in the rear window wiper control circuit.

OBDII Code B370B Saturn - Rear Wiper Function Control Circuit Short to Ground - AutoCodes.com — B370B Saturn Code - Rear Wiper Function Control Circuit Short to Ground

What does this mean?

What are the Possible Causes of the DTC B370B Saturn?

Faulty Rear Window Wiper Motor
Rear Window Wiper Motor harness is open or shorted
Rear Window Wiper Motor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B370B Saturn?

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 B370B Saturn 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 B370B Saturn code?

Need more information on how to fix the B370B Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B370B Saturn code diagnosed by a professional: Find a repair shop in your area

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 B370B Saturn Code

1. What are the common symptoms of OBDII code B370B Saturn (Rear Wiper Function Control Circuit Short to Ground)?

- Common symptoms include the rear wiper not working, the rear wiper working intermittently, or the rear wiper not turning off.

2. What are the possible causes of OBDII code B370B Saturn?

- Possible causes include a short to ground in the rear wiper circuit, a faulty rear wiper motor, damaged wiring, or a defective wiper control module.

3. How can I diagnose the cause of OBDII code B370B Saturn?

- You can use a multimeter to test for continuity in the rear wiper wiring, inspect the rear wiper motor for damage or corrosion, and check the wiper control module for any signs of malfunction.

4. Can I still drive my Saturn with OBDII code B370B?

- It is generally safe to drive your Saturn with this code, but it is recommended to address the issue promptly to ensure the proper functioning of the rear wiper.

5. How can I repair OBDII code B370B Saturn?

- Repair options include repairing or replacing damaged wiring, replacing the rear wiper motor if faulty, and potentially replacing the wiper control module if necessary.

6. Is it possible to reset OBDII code B370B Saturn without fixing the issue?

- Resetting the code without addressing the underlying issue may temporarily remove the warning light, but the problem will persist and likely trigger the code again.

7. Can extreme weather conditions cause OBDII code B370B Saturn to appear?

- Yes, extreme weather conditions like heavy rain or snow can potentially exacerbate issues with the rear wiper function control circuit, leading to the code being triggered.

8. How do I prevent OBDII code B370B Saturn from recurring in the future?

- Regularly inspecting and maintaining the rear wiper system, ensuring proper wiring connections, and addressing any issues promptly can help prevent the code from reappearing.

9. Are there any common mistakes to avoid when diagnosing OBDII code B370B Saturn?

- Avoid overlooking simple causes like loose wiring connections, neglecting to check the rear wiper motor for functionality, and assuming the issue is solely electronic without a thorough inspection.

10. Can a DIY enthusiast repair OBDII code B370B Saturn, or is professional assistance recommended?

- Depending on your skill level and access to tools, DIY repair of this code is possible for some individuals. However, professional assistance may be recommended for complex diagnoses or repairs.