Engine-Codes - Generic - B1794

B1794 Code - Open In Occupant Classification ECU Battery Positive Line

- Code Popularity: 6,313 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B1794?

  • Faulty Occupant Detection ECU
  • Occupant Detection ECU harness is open or shorted
  • Occupant Detection ECU circuit poor electrical connection

|How to Fix the B1794 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 B1794?

Labor: 1.0

The cost to diagnose the B1794 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 Car have Safety Recalls? → Check here

|What are Code B1794 Possible Symptoms?

  • Air Bag Warning Light ON

|What Does the B1794 Code Mean?

This circuit consists of the Occupant Classification ECU and the power source circuit (battery, fuse, wire harness). The Diagnostic Trouble Code (DTC) B1794 is recorded when a malfunction is detected in the Occupant Classification ECU or the power source circuit. When DTC B1794 is output after switching the ignition switch LOCK-ON-LOCK 50 times in a row when a malfunction occurs in the power circuit for the occupant classification system, the DTC is output again when a malfunction is detected even once after being cleared, unless the normal system code is input.

B1794 Code - Open In Occupant Classification ECU Battery Positive Line

|Need more Information on the B1794 Code?

Need more information on how to fix the B1794 code? Get Access to Factory Service Manuals

|Code B1794 Information for Specific Makes

  • B1794 Lexus Open In Occupant Classification ECU Battery Positive Line  📷
  • B1794 Scion Open In Occupant Classification ECU Battery Positive Line  📷
  • B1794 Toyota Open In Occupant Classification ECU Battery Positive Line  📷

|Need Help with the B1794 Code?

Get the B1794 code diagnosed by a professional: Find a repair shop in your area

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.