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EC-1336
[YD (WITH EURO-OBD)]
DTC P1272 FUEL PUMP
2. PERFORM FUEL PUMP LEARNING VALUE CLEARING
NOTE:
If the DTC is detected because of air mixed with fuel (i.e.: caused by lack of fuel), it may become normal by
performing following procedure.
With CONSULT-II
1. Turn ignition switch ON.
2. Perform Fuel Pump Learning value clearing. Refer to EC-994, "
Fuel Pump Learning Value Clearing" .
3. Start engine and let it idle for at least 60 seconds.
4. Select “SELF-DIAG RESULT” mode with CONSULT-II.
5. Touch “ERASE”.
6. Perform EC-1332, "
DTC Confirmation Procedure" , again.
7. Is 1st trip DTC detected again?
With GST
1. Turn ignition switch ON.
2. Perform Fuel Pump Learning value clearing. Refer to EC-994, "
Fuel Pump Learning Value Clearing" .
3. Start engine and let it idle for at least 60 seconds.
4. Select Service $04 with GST.
5. Perform EC-1332, "
DTC Confirmation Procedure" , again.
6. Is 1st trip DTC detected again?
Yes or No
Yes >> GO TO 3.
No >> INSPECTION END
3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector and fuel pump (2) harness
connector.
– Fuel pump temperature sensor (1)
3. Check harness continuity between ECM terminal 10 and fuel
pump terminal 2.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 29 and fuel pump terminal 1.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
Continuity should exist.
MBIB1389E
Continuity should exist.
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