Fuel Pump Control Circuit
4GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump Control Circuit
- Fuel Pump Control Circuit
DESCRIPTION
Refer to DTC P0230 P0230.
WIRING DIAGRAM
Refer to DTC P0230 P0230.
INSPECTION PROCEDURE
PROCEDURE
1. CHECK FUEL PUMP (FUEL PUMP OPERATION)
(a) Check if there is pressure in the fuel inlet hose.
HINT
If there is fuel pressure, you will hear the sound of fuel flowing.
Result:
B -- INSPECT F/PMP RELAY
A -- Continue to next step.
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE C/OPN RELAY)
(a) Connect Techstream to the DLC3.
(b) Turn the engine switch on (IG) and turn the Techstream on.
(c) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.
(d) Check the operation of the relay while operating it using Techstream.
OK:
Operating noise can be heard from the C/OPN relay.
Result:
B -- INSPECT F/PMP RELAY
A -- Continue to next step.
3. CHECK ECM POWER SOURCE CIRCUIT
(a) Check ECM power source circuit ECM Power Source Circuit.
NG -- REPAIR OR REPLACE POWER SOURCE CIRCUIT
OK -- Continue to next step.
4. INSPECT FUSE (F/PMP FUSE)
(a) Remove the F/PMP fuse from the engine room R/B No. 2.
(b) Measure the resistance of the F/PMP fuse.
Standard resistance:
Below 1 Ohms
(c) Reinstall the F/PMP fuse.
NG -- REPLACE FUSE
OK -- Continue to next step.
5. INSPECT INTEGRATION RELAY (EFI NO. 2 RELAY)
(a) Remove the integration relay from the engine room R/B No. 2.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Reinstall the integration relay.
NG -- REPLACE INTEGRATION RELAY Removal
OK -- Continue to next step.
6. INSPECT INTEGRATION RELAY (C/OPN RELAY)
(a) Remove the integration relay from the engine room R/B No. 2.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Reinstall the integration relay.
NG -- REPLACE INTEGRATION RELAY Removal
OK -- Continue to next step.
7. INSPECT ECM (FC VOLTAGE)
(a) Turn the engine switch on (IG).
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - C/OPN RELAY)
OK -- REPLACE ECM Removal
8. INSPECT F/PMP RELAY
(a) Remove the F/PMP relay from the engine room R/B No. 2.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Reinstall the F/PMP relay.
NG -- REPLACE F/PMP RELAY
OK -- Continue to next step.
9. INSPECT FUEL PUMP
(a) Inspect fuel pump Inspection.
NG -- REPLACE FUEL PUMP Removal
OK -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR (FUEL PUMP - F/PMP RELAY AND BODY GROUND)
(a) Check the harness and the connectors between the fuel pump and the F/PMP relay.
(1) Disconnect the Q14 fuel pump connector.
(2) Remove the F/PMP relay from the engine room R/B No. 2.
(3) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
(4) Reinstall the F/PMP relay.
(b) Check the harness and the connectors between the fuel pump and body ground.
(1) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
(2) Reconnect the fuel pump connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
11. CHECK FUEL SYSTEM (C/OPN RELAY - F/PMP RELAY)
(a) Remove the integration relay from the engine room R/B No. 2.
(b) Remove the F/PMP relay from the engine room R/B No. 2.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
(d) Disconnect the fuel pump resistor connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short):
(f) Reinstall the relays.
(g) Reconnect the fuel pump resistor connector.
NG -- REPAIR OR REPLACE ENGINE ROOM RELAY BLOCK
OK -- REPAIR OR REPLACE FUEL SYSTEM
12. INSPECT F/PMP RELAY
(a) Remove the F/PMP relay from the engine room R/B No. 2.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Reinstall the F/PMP relay.
NG -- REPLACE F/PMP RELAY
OK -- Continue to next step.
13. INSPECT FUEL PUMP RESISTOR
(a) Inspect the fuel pump resistor Testing and Inspection.
NG -- REPLACE FUEL PUMP RESISTOR Removal
OK -- Continue to next step.
14. CHECK HARNESS AND CONNECTOR (F/PMP RELAY - FUEL PUMP RESISTOR)
(a) Check the harness and the connectors between the F/PMP relay and the fuel pump resistor.
(1) Remove the F/PMP relay from the engine room R/B No. 2.
(2) Disconnect the A40 fuel pump resistor connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
(4) Reconnect the fuel pump resistor connector.
(5) Reinstall the F/PMP relay.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures