DIAGNOSIS SYSTEM 1. DESCRIPTION (a) When troubleshooting a vehicle with the diagnostic system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the multiplex tilt and telescopic ECU. The multiplex tilt and telescopic ECU stores DTCs when the ECU detects a malfunction in itself or in its circuits. To check the DTCs, connect the Techstream to the DLC3 on the vehicle. The Techstream enables the DTCs to be cleared, several actuators to be activated, and the freeze frame data and various forms of steering data to be checked. 2. CHECK DLC3 (a) Check the DLC3. Click here
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Toyota Tundra Service Manual > Sfi System: Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance (P2121)
DESCRIPTION HINT: Refer to DTC P2120 (See page ). DTC No. DTC Detection Condition Trouble Area P2121 Either conditions (1) or (2) met for 0.5 seconds (1 trip detection logic): (1) Difference between VPA and VPA2 is less than 0.4 V, or more than 1.2 V. (learned value of accelerator off position) (2) ...
