Pre-Collision System: Initialization

The seat belt control ECU operates the pre-collision system based on the stored data that informs that the vehicle is LHD or RHD model. LHD or RHD refers to the seating position of the driver, not which side of the road the vehicle is driven on.

Therefore, when replacing the seat belt control ECU, it is necessary to store the information about whether the vehicle is a LHD or RHD model. This can be performed by following the steps below:

1. Turn the engine switch on (IG).
2. The PCS warning light comes on for at least 3 seconds after turning the engine switch on (IG). Make sure that the warning light does not remain on.
3. At this time, the seat belt control ECU receives vehicle configuration (LHD/RHD) information from the gateway ECU and stores it in memory.
   1. Connect the intelligent tester (with CAN VIM) to the DLC3.
   2. Turn the engine switch on (IG).
   3. Following the display on the tester, select the "Active Test".
      Fig 1: Connecting Intelligent Tester To DLC3

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Seat Belt Control ECU: 

      SEAT BELT CONTROL ECU REFERENCE CHART
      
      

      Tester Display	Test Part	Control Range	Diagnostic Note
      D BELT MOTOR	Driver's seat belt motor	ON: Seat belt motor operate OFF: Seat belt motor does not operate	Seat belt (driver side) is fastened
      P BELT MOTOR	Passenger's seat belt motor	ON: Seat belt motor operate OFF: Seat belt motor does not operate	Seat belt (passenger side) is fastened