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Home >> Toyota >> 2008 >> Highlander Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Control System (Hybrid)) >> SFI System >> DTC P0121 Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem >> Inspection Procedure
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Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

HINT:

Read freeze frame data using the Techstream. The ECM (included in the hybrid vehicle control ECU) records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0121) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    5. Read the DTCs.

Result 

RESULT CHART

Display (DTC output) Proceed to
P0121 A
P0121 and other DTCs B

HINT:

If any DTCs other than P0121 are output, troubleshoot those DTCs first.

B: GO TO DIAGNOSTIC TROUBLE CODE CHART 

A: REPLACE THROTTLE BODY ASSEMBLY  (See THROTTLE BODY )