ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT HOOD SUB-ASSEMBLY (a) Check that the clearance measurements of areas A to D are within the standard range. 
Standard Clearance:
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Toyota Tundra Service Manual > Sfi System: Throttle / Pedal Position Sensor / Switch "D" Circuit (P2120,P2122,P2123,P2125,P2127,P2128,P2138)
DESCRIPTION The accelerator pedal position sensor is mounted on the accelerator pedal bracket and has 2 sensor circuits: VPA (main) and VPA2 (sub). This sensor is a non-contact type and uses Hall-effect elements in order to yield accurate signals even in extreme driving conditions, such as at high s ...
