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Home >> Toyota >> 2017 >> 86 Base, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (4 Of 6) >> SFI System >> DTC P0851: Park / Neutral Switch Input Circuit Low; DTC P0852: Park / Neutral Switch Input Circuit High [06/2016 - 12/2017] >> Typical Enabling Conditions
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Typical Enabling Conditions

FOR MANUAL TRANSMISSION

Monitor runs whenever following DTCs not stored P2158 (Vehicle Speed Sensor "B" Circuit)
U0416 (Invalid Data Received From Vehicle Dynamics Control Module)
U0122 (Lost Communication With Vehicle Dynamics Control Module)
U0073 (Control Module Communication Bus "A" Off)
P0512 (Starter Request Circuit)
P0616 (Starter Relay "A" Circuit Low)
P0617 (Starter Relay "A" Circuit High)
Battery voltage 10.9 V or more
Driving condition change from the following condition A to B: 3 counts
A. Both of the following conditions are met: (a) and (b)
(a) Vehicle speed 0 km/h (0 mph) or less
(b) Engine speed 550 to 880 RPM
B. Both of the following conditions are met: (a) and (b)
(a) Vehicle speed 64 km/h (39.8 mph) or more
(b) Engine speed 1700 to 2700 RPM
ALL (FOR AUTOMATIC TRANSMISSION)

Monitor runs whenever following DTCs not stored U0402 (Invalid Data Received From TCM)
U0101 (Lost Communication with TCM)
U0073 (Control Module Communication Bus "A" Off)
P0512 (Starter Request Circuit)
P0616 (Starter Relay "A" Circuit Low)
P0617 (Starter Relay "A" Circuit High)
Battery voltage 10.9 V or more
Starter relay feedback voltage Less than (battery voltage X 0.35)
P0851 (FOR AUTOMATIC TRANSMISSION)

Transmission range from TCM Not park/neutral
P0852 (FOR AUTOMATIC TRANSMISSION)

Transmission range from TCM Park/neutral