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EC-1300
[YD (WITH EURO-OBD)]
DTC P0628, P0629 FUEL PUMP
DTC P0628, P0629 FUEL PUMP PFP:16700
Description BBS0022V
To control the amount of the fuel inhalation of the fuel pump, a plunger is built into the fuel pump. When the
amount of the fuel inhalation of fuel increases, the fuel pump raises the fuel exhalation pressure. As a result,
the fuel injection pressure is raised. When the load of the engine increases, the ECM sends a signal to the fuel
pump to raise the injection pressure.
CONSULT-II Reference Value in Data Monitor Mode BBS0022W
Specification data are reference values.
On Board Diagnosis Logic BBS0022X
DTC Confirmation Procedure BBS0022Y
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. Let engine idle for at least 5 seconds.
4. If 1st trip DTC is detected, go to EC-1303, "
Diagnostic Proce-
dure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
MONITOR ITEM CONDITION SPECIFICATION
PUMP CURRENT
● Engine: After warming up
● Air conditioner switch: OFF
● Shift lever: Neutral position
● No load
Idle 1,700 - 1,900 mA
2,000 rpm 1,600 - 1,800 mA
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0628
0628
Fuel pump control circuit
low input
ECM detects a control circuit for the fuel pump is
open or short to ground.
● Harness or connectors
(The fuel pump circuit is open or
shorted.)
● Fuel pump
P0629
0629
Fuel pump control circuit
high output
ECM detects a control circuit for the fuel pump is
short to power.
SEF817Y
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