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OK : Go to next step 3. CHECK AIR INDUCTION SYSTEM a. Check the air induction system for vacuum leakage. OK: No leakage from air induction system. NG : REPAIR OR REPLACE AIR INDUCTION SYSTEM OK : Go to next step 4. PERFORM ACTIVE TEST USING TECHSTREAM (A/F CONTROL) a. Connect the Techstream to the DLC3. b. Start the engine and turn the Techstream ON. c. Warm up the engine at an engine speed of 2500 RPM for approximately 90 seconds. d. Enter the following menus: Powertrain/Engine and ECT/Active Test/Control the Injection Volume for A/F Sensor. e. Perform the Control the Injection Volume for A/F Sensor operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume). f. Monitor the voltage outputs of A/F and HO2 sensors (AFS B1S1 and O2S B1S2 or AFS B2S1 and O2S B2S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Standard VOLTAGE REFERENCE Result: RESULT CHART Tester Display (Sensor) Injection Volume Status Voltage AFS B1 S1 or AFS B2 S1 (A/F) +25% Rich Less than 3.0 AFS B1S1 or AFS B2S1 (A/F) -12.5% Lean More than 3.35 O2S B1 S2 or O2S B2 S2 (HO2) +25% Rich More than 0.55 O2S B1 S2 or O2S B2 S2 (HO2) -12.5% Lean Less than 0.4 Status AFS B1S1 or AFS B2S1 Status O2S B1S2 or O2S B2S2 A/F Condition and A/F Sensor Condition Misfire Suspected Trouble Area Proceed To Lean/Rich Lean/Rich Normal - - C
2008 Toyota Tundra 2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
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