DTC P1273 FUEL PUMP
[YD (WITH EURO-OBD)]
TERMI-
WIRE DATA
NAL ITEM CONDITION
COLOR (DC Voltage and Pulse Signal)
NO.
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 sec-
onds.
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