Toyota Sienna Service Manual: Fuel Pump Primary Circuit
DTC P0230 Fuel Pump Primary Circuit
DESCRIPTION
- This DTC is designed to detect a malfunction in the fuel pump (FUEL PUMP) relay circuit. When the system is normal, the battery voltage is applied to FPR terminal of the ECM while the FUEL PUMP relay is turned OFF. If the battery voltage is not applied to the FPR terminal while the FUEL PUMP relay is OFF, the ECM interprets this as a malfunction. The ECM then illuminates the MIL and sets a DTC.
- The FUEL PUMP relay switches the fuel pump speed according to the
engine conditions. The fuel
pump operates when the ECM receives the starter-operating signal (STA) and
crankshaft-rotating
signal (NE). The FUEL PUMP relay is turned ON while the engine is idling or
operating at low load.
This causes current to flow through the fuel pump resistor to the fuel pump. The fuel pump then operates at low speed. The FUEL PUMP relay is turned OFF while the engine is cranking or operating at high load. The fuel pump then operates at normal speed.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|
P0230 |
Open or short in FUEL PUMP relay circuit (1 trip detection logic) |
|
WIRING DIAGRAM
This troubleshooting procedure is based on the premise that the engine is started. If the engine is not started, proceed to the problem symptoms table.
INSPECTION PROCEDURE
1 PERFORM ACTIVE TEST BY INTELLIGENT TESTER
- Connect the intelligent tester to the DLC3.
- Turn the ignition switch to the ON position and turn the intelligent tester ON.
- Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP SP CTL.
- Check the operation of the relay while operating it using the intelligent tester.
OK: Operating noise can be heard from the relay.
2 INSPECT RELAY (FUEL PUMP RELAY)
- Remove the FUEL PUMP relay from the engine room junction block.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
- Reinstall the FUEL PUMP relay.
3 CHECK HARNESS AND CONNECTOR (FUEL PUMP RELAY - ECM)
- Remove the FUEL PUMP relay from the engine room junction block.
- Disconnect the E11 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
- Reconnect the ECM connector.
- Reinstall the FUEL PUMP relay
REPLACE ECM
System Too Lean/ System Too Rich
DTC P0171 System Too Lean (Bank 1)
DTC P0172 System Too Rich (Bank 1)
DTC P0174 System Too Lean (Bank 2)
DTC P0175 System Too Rich (Bank 2)
DESCRIPTION
The fuel trim is related to the feedback co ...
Random / Multiple Cylinder Misfire Detected/ Cylinder Misfire Detected
DTC P0300 Random / Multiple Cylinder Misfire Detected
DTC P0301 Cylinder 1 Misfire Detected
DTC P0302 Cylinder 2 Misfire Detected
DTC P0303 Cylinder 3 Misfire Detected
DTC P0304 Cylinder 4 Misfire ...
Other materials:
Rear view monitor
system
The rear view monitor system assists the driver by displaying an
image of the view behind the vehicle and guide lines while backing
up, for example while parking.
The screen illustrations used in this text are intended as examples,
and may differ from the image that is actually displayed on the
...
Removal
HINT:
Don't use the dropped or damaged yawrate sensor
Free from the foreign matters between yaerate sensor
bracket and body.
Make sure the sensor direction.
1. REMOVE FRONT SEAT ASSEMBLY RH
HINT:
See page SE-40.
2. REMOVE FRONT DOOR SCUFF PLATE RH
3. REMOVE COWL SIDE TRIM BOARD RH
...
Touch Panel Switch does not Function
INSPECTION PROCEDURE
1 CHECK TOUCH PANEL
Check for foreign matter on the display.
OK:
The display is clean
2 CHECK TOUCH SWITCH (DISPLAY CHECK MODE)
Enter the "Display Check" mode (Touch Switch Check).
Touch the display in the area where the switch
malfunction o ...
