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HINT When any of these DTCs are stored, check the APP sensor voltage by entering the following menus APP SENSOR VOLTAGE REFERENCE HINT P2125 upper and lower malfunction ECM P2127 VPA2 1.2 V or less for 0.5 seconds APP sensor Open in VCP2 circuit Open or ground short in ECM P2128 Conditions (a) and (b) continue for a. VPA2 4.8 V or more b. VPA between 0.4 V and 3.45 V APP sensor Open in EPA2 circuit ECM P2138 Condition (a) or (b) continues for a. Difference between VPA and VPA2 0.02 V or less b. VPA 0.4 V or less and VPA2 1.2 V or less Short between VPA and APP sensor ECM Trouble Area Accel Sensor Out No. 1 When AP Released Accel Sensor Out No. 2 When AP Released Accel Sensor Out No. 1 When AP Depressed Accel Sensor Out No. 2 When AP Depressed VCP circuit open 0 to 0.2 V 0 to 0.2 V 0 to 0.2 V 0 to 0.2 V Open or ground short in VPA circuit 0 to 0.2 V 1.2 to 2.0 V 0 to 0.2 V 3.4 to 4.7 V Open or ground short in VPA2 circuit 0.5 to 1.1 V 0 to 0.2 V 2.6 to 4.5 V 0 to 0.2 V EPA circuit open 4.5 to 5.0 V 4.5 to 5.0 V 4.5 to 5.0 V 4.5 to 5.0 V Normal condition 0.5 to 1.1 V 1.2 to 2.0 V 2.6 to 4.5 V 3.4 to 4.7 V
2009 Toyota Tundra 2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
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