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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 198 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0120, DTC P0122, DTC P0123, DTC P0220, DTC P0222, DTC P0223 Or DTC P2135 >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. If different DTCs related to different systems are output together while ECM terminal E2 is used as a ground terminal, ECM terminal E2 may be open. Repair as necessary. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
  2. After confirming DTC, use scan tool to access CURRENT DATA to confirm throttle valve opening percentage with throttle open and closed. See THROTTLE POSITION SENSOR SPECIFICATION  table.
  3. Read freeze frame data using hand-held tester or OBD-II scan tool, as freeze frame data records engine conditions when a malfunction is detected. When troubleshooting, this is useful for determining whether vehicle was running or stopped, engine was warmed up or not, or air-fuel ratio was lean or rich at time of malfunction.
THROTTLE POSITION SENSOR SPECIFICATION

Tester Display Accelerator Pedal Released Accelerator Pedal Depressed
THROTTLE POS 10-24 Percent 64-96 Percent
THROTTLE POS NO. 2 2.1-3.1 Volts 4.5- 5.5 Volts
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