B0770:01 Code - All Wheel Drive Indicator Circuit Short to Battery
Quick Answer
The All Wheel Drive (AWD/4WD Auto) indicator circuit consists of a Light Emitting Diode (LED) feed circuit, a LED, and a LED control circuit. Common causes include Faulty Transfer Case Select Switch, Transfer Case Select Switch harness is open or shorted, Transfer Case Select Switch circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- B0770:01 indicates All Wheel Drive Indicator Circuit Short to Battery.
- Common causes
- Common causes include Faulty Transfer Case Select Switch, Transfer Case Select Switch harness is open or shorted, Transfer Case Select Switch circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code B0770:01 Description
The TCCM tests the AWD indicator circuit for unexpected voltage by monitoring the B+ supplied by the BCM on the indicator dimming control circuit by grounding the AWD indicator control circuit for 2 seconds during the Bulb Test at key ON.
The Diagnostic Trouble Code (DTC) will be set when the TCCM detects 3.4 V or greater on the AWD indicator control circuit when the AWD indicator is commanded ON.
What are the Possible Causes of the DTC B0770:01?
- Faulty Transfer Case Select Switch
- Transfer Case Select Switch harness is open or shorted
- Transfer Case Select Switch circuit poor electrical connection
- Faulty Transfer Case Shift Control Module (TCCM)
How to Fix the DTC B0770:01?
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 B0770:01 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 B0770:01 Code
1. What are the common symptoms of OBDII code B0770:01 - All Wheel Drive Indicator Circuit Short to Battery?
The common symptoms include a malfunctioning all-wheel drive indicator light on the dashboard, difficulty engaging or disengaging the all-wheel drive system, and potential issues with the vehicle's traction control system.
2. What can cause the OBDII code B0770:01 to trigger?
The code B0770:01 is typically triggered by a short circuit in the wiring of the all-wheel drive indicator circuit, often caused by damaged wiring, a faulty indicator switch, or a defective control module.
3. How serious is the OBDII code B0770:01 - All Wheel Drive Indicator Circuit Short to Battery?
While this code may not directly affect the drivability of the vehicle, it is important to address it promptly to ensure the proper functioning of the all-wheel drive system and associated safety features.
4. Can I continue driving my vehicle with the OBDII code B0770:01 present?
It is generally safe to continue driving the vehicle with this code, but it is recommended to have the issue diagnosed and repaired as soon as possible to prevent potential issues with the all-wheel drive system.
5. How can I diagnose and repair the OBDII code B0770:01 myself?
Diagnosing and repairing this code may require advanced automotive knowledge and tools. It is recommended to consult a professional mechanic or dealership for an accurate diagnosis and repair.
6. Will resetting the OBDII code B0770:01 make it go away permanently?
Resetting the code may temporarily clear the error message, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the problem.
7. How much does it typically cost to repair the OBDII code B0770:01?
The cost of repairing this code can vary depending on the specific cause of the issue, labor rates in your area, and the cost of replacement parts. It is recommended to obtain quotes from different repair shops for an accurate estimate.
8. Can the OBDII code B0770:01 cause other problems in my vehicle?
While this code specifically relates to the all-wheel drive indicator circuit, unresolved electrical issues in the vehicle can potentially lead to other problems over time. It is best to address the issue promptly to avoid further complications.
9. Is it possible to prevent the OBDII code B0770:01 from occurring in the future?
Regular vehicle maintenance, including checking the wiring harness, indicator switch, and control module for any signs of damage, can help prevent the recurrence of this code. Additionally, addressing any electrical issues promptly can reduce the likelihood of future problems.
10. How long does it typically take to repair the OBDII code B0770:01?
The repair time for this code can vary depending on the complexity of the issue and the availability of parts. In some cases, the repair may be completed within a few hours, while more extensive wiring or module replacements may take longer.
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