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Home >> Subaru >> 2019 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (3 Of 3) >> EFI System (FA20) >> DTC P0851: Neutral Switch Circuit Low; DTC P0852: Neutral Switch Circuit High >> Circuit description >> Typical Enabling Conditions
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Typical Enabling Conditions

Transmission M/T

VOLTAGE SPECIFICATION

Overlap prohibited DTC P0500 (Vehicle Speed Sensor (VSS))
Battery Voltage 10.9V or more
Number of the driving condition change from A to B described below: 1 time
A. All of the following conditions are met: (a), (b)
(a) Vehicle speed 0 km/h {0 MPH} or less
(b) Engine speed 550 to 880 r/min
B. All of the following conditions are met: (a), (b)
(a) Vehicle speed 64 km/h {40 MPH} or more
(b) Engine speed 1700 to 2700 r/min

Transmission A/T

VOLTAGE SPECIFICATION

Overlap prohibited DTC P0616, P0617, P0512 (starter switch circuit with push start system)
U0073, U0101, U0402 (CAN System)
Starter relay feedback voltage (Starter relay is not energized) Battery voltage xless than 0.35 V
Battery voltage 10.9V or more

P0851

ENGINE SPEED SPECIFICATION

Engine speed 500 RPM or more