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Home >> Subaru >> 2015 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Electrical >> Starter >> Entry Start System Start System (Keyless Start) >> Entry & Start System (Start Function) >> DTC B2282: Vehicle Speed Signal Abnormal; DTC B2283 Vehicle Speed Sensor Fault Detection >> Circuit description
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Circuit description

DTC B2282 is output when a mismatch is detected between the vehicle speed signal via the direct line sent from the brake actuator assembly (skid control ECM) and the vehicle speed signal sent via the CAN communication.

DTC B2283 is output when a problem is detected in the speed sensor.

NOTE: If you remove and then reconnect the battery cable, the power returns to the mode it was before you removed the cable.
DTC DETECTION CONDITION

DTC No. DTC detection status Faulty part DTC Output Confirmation Operation
B2282 This is output when a mismatch is detected between the vehicle speed signal via the direct line sent from the brake actuator assembly (skid control ECM) and the vehicle speed signal sent via the CAN communication.
  • AM2 No. 2 fuse
  • Vehicle stability control system
  • Collation ECM (smart key ECM assembly)
  • Wiring harness or connector
Drive the vehicle at 25 km/h {16 MPH} or faster for 20 seconds, then drive the vehicle at 5 km/h {3 MPH} for 20 seconds.
B2283 Meet any of these conditions (a speed sensor problem is detected) (1-trip detection logic(1)):
  • Vehicle speed signal error detection 1: Major decrease of the vehicle speed is detected.
  • Vehicle speed signal error detection 2: A problem was detected through engine speed detection.
  • AM2 No. 2 fuse
  • Vehicle stability control system
  • Collation ECM (smart key ECM assembly)
  • Wiring harness or connector
In IG ON, any of the following conditions is established.
  • Direct connection vehicle speed pulse showing 50 km/h or more continues for 10 seconds, then the CAN and direct connection speed pulses both turn to 0 km/h within 1 second.
  • In an AT vehicle, CAN and the direct connection show 0 km/h, the engine speed (according to the direct connection) is 2000 r/min or more, the shift lever is not in P or N, and ACCR is not in LOW level for 300 seconds.
  • In an MT vehicle, CAN and the direct connection show 0 km/h, the engine speed (according to the direct connection) is 2000 r/min or more, the N position for the shift lever is OFF, the clutch switch is OFF, and ACCR is in the LOW level for 300 seconds.
(1) The code is output only when the problem is found and the engine switch is on (IG).

Vehicle status and failsafe function when a problem is detected

VEHICLE STATUS AND FAILSAFE FUNCTION PROBLEM DETECTED

DTC No. Vehicle status when a problem is detected Failsafe function when a problem is detected
B2282
  • If a problem is found in the signal via the direct line or the CAN communication, and if the vehicle speed is not displayed, there is no effect on vehicle operations.
  • If a problem is found in the signal from the direct line or the CAN communication, and if the vehicle running is displayed, the power mode cannot be switched from on (IG) to off.
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B2283
  • If you press the engine switch when the vehicle is running, the engine switch will turn off (the engine stops).
  • If the electrical key transmitter sub-assembly is in the vehicle interior, even if you perform engine start operations, the engine will not start.
Steering lock motor operations are prohibited.

Related [Current Data Display & Save] and [System Operation Check Mode] items

DTC DESCRIPTION

DTC No. [Current Data Display & Save] items [System Operation Check Mode] items
B2282
B2283
Power supply
  • [Vehicle speed signal]
  • [Engine Speed]
  • [Power supply status]

Engine
  • [Engine Speed]

ABS-VSC-TRC
  • [Wheel speed]
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