B370C GMC Code - Rain Sensor Intensity Signal 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
- B370C GMC indicates Rain Sensor Intensity Signal 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.
Code B370C GMC Description
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 moisture sensor signal 2 circuit.
What are the Possible Causes of the DTC B370C GMC?
- 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 B370C GMC?
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 B370C GMC 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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Frequently Asked Questions about B370C GMC Code
1. What are the common symptoms of OBDII code B370C GMC (Rain Sensor Intensity Signal Circuit)?
- The common symptoms include erratic or non-functional operation of the rain-sensing wipers, intermittent wiper speed, or complete wiper failure.
2. What are the possible causes of OBDII code B370C GMC?
- The code can be triggered by issues such as a faulty rain sensor, damaged wiring or connectors in the rain sensor circuit, or a malfunctioning control module.
3. How can I diagnose the Rain Sensor Intensity Signal Circuit issue?
- Diagnose the problem by visually inspecting the rain sensor and its wiring for any visible damage. Use a multimeter to test the sensor's resistance and check for voltage at different points in the circuit.
4. What are some repair tips for fixing OBDII code B370C GMC?
- Repair tips may include replacing the faulty rain sensor, repairing damaged wiring or connectors, resetting the control module, or performing a software update if necessary.
5. Can I drive my vehicle with OBDII code B370C GMC?
- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure the proper functioning of the wipers, especially in rainy conditions.
6. Is OBDII code B370C GMC a common issue in GMC vehicles?
- This code is not as common as other OBDII codes, but it can occur in GMC vehicles equipped with rain-sensing wipers and related systems.
7. How much does it typically cost to repair OBDII code B370C GMC?
- The cost of repair can vary depending on the underlying cause of the issue, but it may range from $100 to $300 for parts and labor.
8. Can I reset OBDII code B370C GMC without fixing the underlying problem?
- While clearing the code may temporarily turn off the warning light, it is not recommended as the issue will persist and potentially lead to further wiper system malfunctions.
9. Are there any preventative measures to avoid OBDII code B370C GMC?
- Regularly inspecting and maintaining the rain sensor system, keeping the windshield clean, and addressing any wiper system issues promptly can help prevent this code from occurring.
10. How long does it take to repair OBDII code B370C GMC?
- The repair time can vary based on the specific cause of the issue and the complexity of the repair, but it typically takes a few hours to complete the necessary diagnostics and repairs.
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