DTC P0748
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P0748: Pressure Control Solenoid “A” Electrical Any of the following conditions is met.
•Fuel flow actuator power supply circuit is open. (1 D/C detection logic)•Fuel flow actuator power supply circuit is short to power supply. •Fuel flow actuator power supply circuit is short to ground. •Temperature of fuel flow actuator power supply circuit is out of specified range. |
•Fuel flow actuator and/or its circuit
•ECM |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | A2: | Fuel flow actuator drive circuit | 2. | Fuel flow actuator |
| A1: | Fuel flow actuator power supply circuit | 1. | ECM |
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
Fuel flow actuator power supply circuit and drive circuit check
1)Check “A1” and “A2” circuits according to Step 1 of Fuel Flow Actuator Operation Check:D16AA.
Is check result OK?
|
Go to Step 3.
|
Repair defective wire harness.
|
| 3 |
Fuel flow actuator check
1)When ignition is “OFF”, connect “D01” connector to ECM and fuel flow actuator connector.
2)Check fuel flow actuator.
Is check result OK?
|
Check low-pressure fuel supply circuit and high-pressure fuel supply circuit.
•Low-pressure fuel supply circuit:
•High-pressure fuel supply circuit: |
Replace high pressure pump.
|