Engine-Codes - Lexus - B15C4 Lexus

B15C4 Lexus Code - Airbag Signal Malfunction/Not Input

- Code Popularity: 2,939 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

What are the Possible Causes of the Code B15C4 Lexus?

  • Faulty Center Airbag Sensor Assembly
  • Center Airbag Sensor Assembly harness is open or shorted
  • Center Airbag Sensor Assembly circuit poor electrical connection
  • Faulty Data Communication Module (DCM) (Telematics Transceiver)

How to Fix the B15C4 Lexus Code?

Start by checking 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.

What is the Cost to Diagnose the Code B15C4 Lexus?

Labor: 1.0

The cost to diagnose the B15C4 Lexus 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.

Does your Lexus have Safety Recalls? → Check here

What are Code B15C4 Lexus Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Air Bag Warning Light ON

What Does the B15C4 Lexus Code Mean?

If the Data Communication Module (DCM) (Telematics Transceiver) detects an error in communication between the DCM (Telematics Transceiver) and the Center Airbag Sensor Assembly as a result of the DCM (Telematics Transceiver) self check, this Diagnostic Trouble Code (DTC) will be set.

B15C4 Lexus Code - Airbag Signal Malfunction/Not Input

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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.