AutoCodes – Chevrolet – B370D Chevrolet

B370D Chevrolet Code - Rain Sensor Mode Control Circuit

Quick Answer

Ignition voltage is supplied to the windshield outside moisture sensor from the Body Control Module (BCM). Common causes include Faulty Windshield Outside Moisture Sensor (Rain Sensor), Windshield Outside Moisture Sensor harness is open or shorted, Windshield Outside Moisture Sensor 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
B370D Chevrolet indicates Rain Sensor Mode Control Circuit.
Common causes
Common causes include Faulty Windshield Outside Moisture Sensor (Rain Sensor), Windshield Outside Moisture Sensor harness is open or shorted, Windshield Outside Moisture Sensor 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 571
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 13, 2020
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Code B370D Chevrolet Description

Ignition voltage is supplied to the windshield outside moisture sensor from the Body Control Module (BCM). Whenever the ignition is in the run or accessory positions, the BCM sends the wiper/washer switch status using a Pulse Width Modulated (PWM) signal through the windshield outside moisture sensor signal 1 circuit to the outside moisture sensor. When a wipe cycle is needed, the moisture sensor sends a PWM voltage signal through the moisture sensor signal 2 circuit back to the BCM requesting the wiper operation.
The windshield outside moisture sensor uses the moisture sensor signal 2 circuit to command wiper motor wipe cycles and to confirm the moisture sensor signal 1 is being received. If at anytime communication between the windshield outside moisture sensor and BCM is lost, the BCM will use the inputs from the windshield wiper/washer switch in the delay positions to operate the wiper motor at continuous variable delay intervals.
The Diagnostic Trouble Code (DTC) sets if an open, short to ground or a short to voltage has been detected on the moisture Sensor Signal 1 circuit.
OBDII Code B370D Chevrolet - Rain Sensor Mode Control Circuit - AutoCodes.com
B370D Chevrolet Code - Rain Sensor Mode Control Circuit

What are the Possible Causes of the DTC B370D Chevrolet?

  • Faulty Windshield Outside Moisture Sensor (Rain Sensor)
  • Windshield Outside Moisture Sensor harness is open or shorted
  • Windshield Outside Moisture Sensor circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC B370D 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 B370D 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 B370D Chevrolet Code

1. What are the common symptoms of OBDII code B370D Chevrolet related to the Rain Sensor Mode Control Circuit?

- Common symptoms include malfunctioning automatic wipers, erratic wiper behavior, or complete failure of the rain sensor feature.

2. What are the possible causes of OBDII code B370D Chevrolet indicating an issue with the Rain Sensor Mode Control Circuit?

- The most common causes are a faulty rain sensor module, damaged wiring or connectors, or issues with the wiper control module.

3. How can I diagnose the OBDII code B370D Chevrolet for the Rain Sensor Mode Control Circuit issue?

- Diagnosis typically involves checking the rain sensor module, inspecting the wiring and connectors, and testing the wiper control module for proper functionality.

4. Can I still drive my vehicle with OBDII code B370D Chevrolet triggered by the Rain Sensor Mode Control Circuit problem?

- While it may be possible to drive the vehicle, it is not recommended as the rain sensor feature plays a crucial role in ensuring visibility during inclement weather.

5. How can I reset the OBDII code B370D Chevrolet related to the Rain Sensor Mode Control Circuit after making repairs?

- The code can be cleared using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to reset the system.

6. Are there any simple repair tips for fixing the OBDII code B370D Chevrolet associated with the Rain Sensor Mode Control Circuit?

- Check for loose or damaged wiring, ensure proper connections to the rain sensor module, and inspect the sensor itself for any signs of damage.

7. Do I need specialized tools to repair the OBDII code B370D Chevrolet for the Rain Sensor Mode Control Circuit issue?

- Basic tools such as a multimeter, wiring diagram, and possibly a trim removal tool may be needed to diagnose and repair the rain sensor circuit problem.

8. Will fixing the OBDII code B370D Chevrolet linked to the Rain Sensor Mode Control Circuit be costly?

- The cost of repair can vary depending on the underlying issue, but it is recommended to address the problem promptly to prevent further damage or safety concerns.

9. Can extreme weather conditions affect the triggering of OBDII code B370D Chevrolet for the Rain Sensor Mode Control Circuit?

- Yes, extreme weather conditions like heavy rain or snow may exacerbate issues with the rain sensor circuit, leading to the triggering of the diagnostic trouble code.

10. How important is it to address the OBDII code B370D Chevrolet for the Rain Sensor Mode Control Circuit problem promptly?

- Promptly addressing the issue is crucial to ensure the proper functioning of the rain sensor feature, which enhances driver visibility and safety during adverse weather conditions.

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