Dtc P0230 Fuel Pump Primary Circuit
Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK TERMINAL VOLTAGE (F/PMP RELAY POWER SOURCE)
INSPECT RELAY (Marking: F/PMP)
CHECK HARNESS AND CONNECTOR (F/PMP RELAY - ECM)
DTC P0230 Fuel Pump Primary Circuit |
DESCRIPTION
When the engine is cranked, a signal is sent from the ignition control ECU's STSW terminal to the ECM's STSW terminal. Then voltage travels from the ECM's STAR terminal through the park/neutral position switch to the STARTER relay coil. The STAR terminal also sends a signal to the STA terminal. When the STA signal and NE signal are input to the ECM, the ECM interior's Tr1 turns on, which causes power to be supplied to the C/OPN relay coil (C/OPN on). As a result, the F/PMP relay actuates, which causes the fuel pump to operate. If the engine is operating and NE signals are being output, the ECM interior's Tr1 is on (C/OPN on), and the fuel pump will continue operating. The fuel pump's has a high and low speed setting. When the engine is starting or operating with a heavy load, the ECM interior's Tr2 turns on to actuate the F/PMP relay so that the fuel pump operates at the high speed setting. When the engine is idling or operating with a light load, the Tr2 turns off, and current flows through the fuel pump resister to the fuel pump so that the fuel pump operates at the low speed setting.
DTC No.
| DTC Detection Condition
| Trouble Area
|
P0230
| Open or short in F/PMP relay circuit (1 trip detection logic)
| - Open or short in F/PMP relay circuit
- F/PMP relay
- ECM
|
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 (RAV4_ACA30 RM000002205011X.html).
INSPECTION PROCEDURE
| 1.CHECK TERMINAL VOLTAGE (F/PMP RELAY POWER SOURCE) |
Remove the F/PMP relay from the engine room No. 1 relay block.
Measure the voltage of the engine room No. 1 relay block terminal.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
F/PMP relay holder terminal (2) - Body ground
| STA signal ON
| 9 to 14 V
|
F/PMP relay holder terminal (2) - Body ground
| STA signal OFF
| 0 to 3 V
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (F/PMP RELAY - EFI MAIN RELAY) |
|
|
| 2.INSPECT RELAY (Marking: F/PMP) |
Remove the F/PMP relay from the engine room No. 1 relay block.
Measure the resistance of the F/PMP relay.
- Standard resistance:
Tester Connection
| Specified Condition
|
3 - 4
| Below 1 Ω
|
3 - 4
| 10 kΩ or higher
(when battery voltage applied to terminals 1 and 2)
|
3 - 5
| 10 kΩ or higher
|
3 - 5
| Below 1 Ω
(when battery voltage applied to terminals 1 and 2)
|
| 3.CHECK HARNESS AND CONNECTOR (F/PMP RELAY - ECM) |
Remove the F/PMP relay from the engine room No. 1 relay block.
Disconnect the ECM connector.
Measure the resistance of the wire harness side connector.
- Standard resistance:
Tester Connection
| Specified Condition
|
F/PMP relay holder terminal (1) - B96-59 (FPR)
| Below 1 Ω
|
F/PMP relay holder terminal (1) or B96-59 (FPR) - Body Ground
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
