Test Description

Refer to HIGH FUEL PRESSURE SYSTEM section.

DTC P1248 - FUEL PUMP RELAY CONTROL CIRCUIT OPEN

Step	Action	Values	Yes	No
1	Refer to the Knock Sensing System Check . Was the "On-Board Diagnostic (OBDII) System Check" performed?	-	Go to Step 2	Go to On-Board Diagnostic (OBD-II) System Check
2	Ignition "OFF". Disconnect the Fuel pump relay. Disconnect the ECM. Check the Circuit between the Fuel pump relay and the ECM for the following condition: A short to ground. An open circuit. Was a problem found?	-	Go to Step 3	Go to Step 5
3	Check the harness between the fuel pump relay and battery. If a problem found, repair or replace as necessary. Was a problem found?	-	Verify repair	Go to Step 4
4	Replace the circuit as necessary. Is the action complete?	-	Verify repair	-
5	Check the fuel pump relay. Ignition "OFF". Check the fuel pump relay. If a problem is found, repair as necessary. Was the problem found?	-	Verify repair	Go to Step 6
6	Install the test ECM. Program the test ECM (Immobilizer system). Refer to IMMOBILIZER SYSTEM . Check the OBD-II test for following condition: When the ignition is "ON", turn on the MIL and RPL (RPL is put out after 3 seconds). When the engine is started. Did the DTC disappear?	-	Go to Step 7	Go to Step 2
7	Replace the original ECM. Check the poor connection between the ECM and ECM connector. Recheck the OBD -II test again. When the engine is started. Did the DTC disappear?	-	Verify repair	Go to Step 8
8	Disconnect the ABS control unit connector. Reprogramming the original ECM. (Engine control and Immobilizer control) Recheck the OBD -II. Did the DTC disappear?	-	Verify repair	Go to Step 9
9	Replace the ECM. Recheck the OBD -II test again. Did the DTC disappear?	-	Verify repair	Refer to Diagnostic Aids