AutoCodes - Mazda - B1891 MAZDA

B1891 MAZDA Code - Air Bag Tone Warning Indicator Circuit Short to Battery

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|B1891 MAZDA code possible causes

  • Faulty Instrument Cluster Module
  • Instrument Cluster Module harness is open or shorted
  • Instrument Cluster Module circuit poor electrical connection
  • Faulty Restraints Control Module (RCM)

|How do I fix the B1891 MAZDA code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Cost of diagnosing the B1891 MAZDA code

Labor: 1.0

The cost of diagnosing the B1891 MAZDA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B1891 MAZDA code possible symptoms?

  • Air Bag Warning Light ON

|B1891 MAZDA code description

The connection between the Instrument Cluster Module and Restraints Control Module (RCM) is used to signal a chime if the primary air bag indicator is inoperative and another Supplemental Restraint System (SRS) fault exists. The RCM monitors this connection to the Instrument Cluster Module. If the RCM detects a circuit failure on the connection to the cluster, it will store diagnostic trouble code (DTC) B1891 in memory and flash lamp on the air bag indicator.
OBDII Code B1891 Mazda - Air Bag Tone Warning Indicator Circuit Short to Battery - AutoCodes.com

|Need more information with the B1891 MAZDA code?

Need more information on how to fix the B1891 MAZDA code? Get Access to Factory Service Manuals

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.

|Need help with a B1891 MAZDA code?

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|B1891 MAZDA code comments

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Repair Importance Level: 3
 
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