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DTC P0131, P0151 A/F SENSOR 1 EC-251 C D E F G H I J K L M A EC Specification data are reference values and are measured between each terminal and ground. CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam- : Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.) Diagnostic Procedure NBS002XB 1. CHECK GROUND CONNECTIONS 1. Turn ignition switch OFF. 2. Loosen and retighten three ground screws on the body. OK or NG OK >> GO TO 2. NG >> Repair or replace ground connections. TER- MINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage) 24 SB A/F sensor 1 heater [Engine is running] ● Warm-up condition ● Idle speed Approximately 5V 57 G/Y A/F sensor 1 (bank 2) [Engine is running] ● Warm-up condition ● Idle speed Approximately 2.6V 58 G Approximately 2.3V 76 L/W Approximately 3.1V 77 GY Approximately 2.3V PBIB1584E PBIB2417E |