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0.5 - 1.0V [Engine is running] ● Warm-up condition ● Idle speed MBIB0887E 29 L Fuel pump 0.5 - 1.0V [Engine is running] ● Warm-up condition ● Engine speed: 2,000 rpm MBIB0888E : Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.) On Board Diagnosis Logic EBS013G8 NOTE: If DTC P1273 is displayed with DTC P0652 or P0653, first perform the trouble diagnosis for DTC P0652 or P0653. Refer to EC-1206, "DTC P0652, P0653 SENSOR POWER SUPPLY" . DTC No. Trouble diagnosis name DTC detecting condition Possible cause ● Fuel pump ● Air mixed with fuel P1273 Fuel pump insufficient flow ECM detects the abnormal pulse of fuel pressure. ● Lack of fuel ● Fuel rail pressure sensor DTC Confirmation Procedure EBS013G9 NOTE: If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test. WITH CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Select “DATA MONITOR” mode with CONSULT-II. 3. Keep engine speed more than 2,000 rpm for at least 10 seconds. 4. If 1st trip DTC is detected, go to EC-1240, "Diagnostic Proce- dure" . SEF817Y WITH GST Follow the procedure “WITH CONSULT-II” above. EC-1238
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