B1870 Lincoln Code - Lamp Air Bag Warning Indicator Circuit Short To Battery
Quick Answer
The air bag indicator is designed to illuminate for 6 (±2) seconds when the ignition switch is turned to the RUN position. Common causes include Blown Air Bag Warning Light bulb, Air Bag Warning Light bulb harness is open or shorted, Air Bag Warning Light bulb 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
- B1870 Lincoln indicates Lamp Air Bag Warning Indicator Circuit Short To Battery.
- Common causes
- Common causes include Blown Air Bag Warning Light bulb, Air Bag Warning Light bulb harness is open or shorted, Air Bag Warning Light bulb 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 B1870 Lincoln Description
The air bag Restrain Control Module (RCM) module monitors the air bag indicator for open and short to ground conditions. If the ECS detects an open or short to battery condition on the air bag indicator circuit, it will store a Diagnostic Trouble Code (DTC) B1870 in memory.
If the RCM detects an air bag indicator failure in addition to another SRS failure, the RCM will send a signal to the Generic Electronic Module (GEM) module to produce five sets of five tone bursts.
What are the Possible Causes of the DTC B1870 Lincoln?
- Blown Air Bag Warning Light bulb
- Air Bag Warning Light bulb harness is open or shorted
- Air Bag Warning Light bulb circuit poor electrical connection
- Faulty Restrain Control Module (RCM)
How to Fix the DTC B1870 Lincoln?
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 B1870 Lincoln 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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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
Frequently Asked Questions about B1870 Lincoln Code
1. What are the common symptoms of OBDII code B1870 in a Lincoln vehicle?
- The common symptoms include the airbag warning light staying illuminated on the dashboard and possible issues with the airbag system.
2. What can cause the OBDII code B1870 in a Lincoln vehicle?
- The code B1870 is typically triggered by a short circuit to the battery within the airbag warning indicator circuit.
3. How can I diagnose the cause of OBDII code B1870 in my Lincoln?
- You can use a diagnostic scanner to retrieve the specific fault codes and then inspect the wiring and connections in the airbag warning indicator circuit for any signs of damage or shorts.
4. Is it safe to drive my Lincoln with OBDII code B1870 present?
- It is not recommended to drive the vehicle with the airbag warning indicator circuit issue, as it may affect the proper functioning of the airbag system in case of an accident.
5. Can I reset the OBDII code B1870 in my Lincoln by disconnecting the battery?
- While disconnecting the battery may temporarily clear the code, it is important to address the root cause of the issue to prevent it from reoccurring.
6. How should I repair the Lamp Air Bag Warning Indicator Circuit Short To Battery issue in my Lincoln?
- The repair typically involves locating and fixing the short to the battery within the airbag warning indicator circuit, which may require repairing or replacing damaged wiring or connectors.
7. Are there any safety precautions I should take when working on the airbag system related to OBDII code B1870?
- It is crucial to disconnect the vehicle's battery and wait for a specified period before working on the airbag system to prevent accidental deployment.
8. Can a DIY enthusiast fix the OBDII code B1870 issue in a Lincoln, or is professional help recommended?
- While some DIY enthusiasts may be able to diagnose and repair the issue, dealing with the airbag system and electrical components can be complex and potentially dangerous, so professional help is often recommended.
9. Will fixing OBDII code B1870 in my Lincoln require specialized tools or equipment?
- Diagnosing and repairing the airbag warning indicator circuit issue may require specialized diagnostic tools and equipment to accurately locate and address the problem.
10. How can I prevent OBDII code B1870 from occurring again in my Lincoln in the future?
- Regularly inspecting the airbag warning indicator circuit for any signs of wear, damage, or shorts, and addressing any issues promptly can help prevent the recurrence of the B1870 fault code.
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