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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 121 (Smart Access System (For Start) - Diagnostic Codes) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, Gasoline Model) >> DTC B2282-31: Vehicle Speed Signal Circuit Open; DTC B2282-62: Vehicle Speed Signal Compare Failure [10/2022 - ] >> Description

DTC B2282-31: Vehicle Speed Signal Circuit Open; DTC B2282-62: Vehicle Speed Signal Compare Failure [10/2022 - ]: Description

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DTC B2282-31 is stored when the vehicle speed signal sent by the skid control ECU via direct line and the vehicle speed signal sent via CAN communication do not match.

DTC B2282-62 is stored when a malfunction in the vehicle speed sensor is detected.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority Note
B2282-31 Vehicle Speed Signal Circuit Open Vehicle speed signal malfunction is detected (excessive deceleration is detected). (1-trip detection logic*)
  • Electronically controlled brake system
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
 Power Source Control A DTC Output Confirmation Operation: 
  1. Drive the vehicle at a vehicle speed of 25 km/h (16 mph) or more for 20 seconds, and then drive the vehicle at a vehicle speed of less than 5 km/h (3 mph) for 20 seconds.
B2282-62 Vehicle Speed Signal Compare Failure The vehicle speed signal sent by the skid control ECU via direct line and the vehicle speed signal sent via CAN communication do not match. (1-trip detection logic*)
  • Electronically controlled brake system
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
 Power Source Control A DTC Output Confirmation Operation: 
  1. Drive the vehicle at a vehicle speed of 50 km/h (31 mph) or more for 10 seconds, and then drive the vehicle at a vehicle speed of less than 50 km/h (31 mph).
  1. *: Only detected while a malfunction is present and the ignition switch is ON.
VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

DTC Code Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
B2282-31
  • The power source mode is changed to off (the engine is stopped) by pressing the engine switch while the vehicle is being driven.
  • With the electrical key transmitter sub-assembly in the cabin, even if an engine start operation is performed, the engine will not start.
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B2282-62
  • When the signal sent via either direct line or CAN communication is malfunctioning and indicates that the vehicle speed is 0 km/h (0 mph), there is no effect on vehicle behavior.
  • When the signal sent via either direct line or CAN communication is malfunctioning and indicates that the vehicle is moving, the ignition switch cannot be turned from ON to off.
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RELATED DATA LIST AND ACTIVE TEST ITEMS

DTC No. Data List and Active Test
B2282-31
B2282-62		 Power Source Control 
  • Vehicle Running Condition (Line)
  • Power Supply Condition

Brake/EPB 
  • Vehicle Speed
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