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DTC P1272 FUEL PUMP
EC-1417
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
On Board Diagnosis Logic EBS0123S
The MI will not light up for this self-diagnosis.
DTC Confirmation Procedure EBS0123T
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. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and keep engine speed more than 4,000 rpm for at
least 5 seconds, then release the accelerator pedal.
4. If 1st trip DTC is detected, go to EC-1419, "
Diagnostic Proce-
dure" .
29 L Fuel pump
[Engine is running]
● Warm-up condition
● Idle speed
0.5 - 1.0V
[Engine is running]
● Warm-up condition
● Engine speed is 2,000 rpm
0.5 - 1.0V
TERMI-
NAL
NO.
WIRE
COLOR
ITEM CONDITION
DATA
(DC Voltage and Pulse Signal)
MBIB0887E
MBIB0888E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1272
Fuel rail pressure relief
valve open
Fuel rail pressure relief valve is open
because of fuel pressure control system mal-
function.
● Harness or connectors
(Fuel pump circuit is open or shorted.)
● Fuel pump
● Fuel rail pressure sensor
● Air mixed with fuel
● Lack of fuel
● Fuel transport pump operation
SEF817Y
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