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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 idling (press the RIGHT or LEFT button to change the fuel injection volume). f. Monitor the output voltages of the A/F and HO2 sensors (AFS B1 S1 and O2S B1 S2 or AFS B2 S1 and O2S B2 S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or The sensors react in accordance with increases and decreases in the fuel injection volume. Standard FUEL INJECTION - VOLTAGE SPECIFICATION A/F SENSOR (SENSOR 1) OUTPUT VOLTAGE REFERENCE Tester Display (Sensor) Injection Volume Status Voltage AFS B1 S1 (A/F) +25% Rich Less than 3.0 -12.5% Lean Higher than 3.35 O2S B1 S2 (HO2) ?25% Rich Higher than 0.55 -12.5% Lean Less than 0.4 AFS B2 S1 (A/F) +25% Rich Less than 3.0 -12.5% Lean Higher than 3.35 O2S B2 S2 (HO2) +25% Rich Higher than 0.55 -12.5% Lean Less than 0.4 NOTE: The A/F sensor has an output delay of a few seconds and the HO2 sensor (for Case A/F Sensor (Sensor 1) Output Voltage HO2 Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 A/F sensor A/F sensor heater A/F sensor circuit
2008 Toyota Tundra 2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
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