Fuel Pump Control Circuit

2GR-FE ENGINE CONTROL: 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

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE FUEL PUMP SPEED CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Active Test /Activate the Fuel Pump Speed Control.

(e) Check the operation of the relay while operating it using the Techstream.

OK:

Operating noise can be heard from the relay.

NG -- CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY VOLTAGE)
OK -- Continue to next step.

2. INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY (F/PMP RELAY)

(a) Remove the engine room junction block assembly from the engine room relay block.

(b) Disconnect the engine room junction block assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

Text in Illustration:

(d) Reconnect the engine room junction block assembly connector.

(e) Reinstall the engine room junction block assembly.

NG -- REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY Removal
OK -- Continue to next step.

3. INSPECT FUEL PUMP RESISTOR

(a) Disconnect the fuel pump resistor.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

Text in Illustration:

(c) Reconnect the fuel pump resistor.

NG -- REPLACE FUEL PUMP RESISTOR Removal
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - FUEL PUMP RESISTOR)

(a) Remove the engine room junction block assembly from the engine room relay block.

(b) Disconnect the engine room junction block assembly

(c) Disconnect the fuel pump resistor connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Standard Resistance (Check for Short):

(e) Reconnect the fuel pump resistor connector.

(f) Reconnect the engine room junction block assembly connector.

(g) Reinstall the engine room junction assembly block.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - FUEL PUMP RESISTOR)
OK -- Continue to next step.

5. INSPECT FUEL SUCTION WITH PUMP AND GAGE TUBE ASSEMBLY

(a) Inspect the fuel suction with pump and gage tube assembly Fuel Pump.

NG -- REPLACE FUEL SUCTION WITH PUMP AND GAGE TUBE ASSEMBLY Removal
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (FUEL PUMP ASSEMBLY - ENGINE ROOM JUNCTION BLOCK ASSEMBLY)

(a) Remove the engine room junction block assembly from the engine room relay block.

(b) Disconnect the engine room junction block assembly connector.

(c) Disconnect the fuel suction with pump and gage tube assembly connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Standard Resistance (Check for Short):

(e) Reconnect the engine room junction block assembly connector.

(f) Reinstall the engine room junction block assembly.

(g) Reconnect the fuel suction with pump and gage tube assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PUMP ASSEMBLY - ENGINE ROOM JUNCTION BLOCK ASSEMBLY)
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (FUEL SUCTION WITH PUMP AND GAGE TUBE ASSEMBLY - BODY GROUND)

(a) Disconnect the fuel suction with pump and gage tube assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

Text in Illustration:

(c) Reconnect the fuel suction with pump and gage tube assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL SUCTION WITH PUMP AND GAGE TUBE ASSEMBLY - BODY GROUND)
OK -- Continue to next step.

8. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - ECM)

(a) Remove the engine room junction block assembly from the engine room relay block.

(b) Disconnect the engine room junction block assembly connector.

(c) Disconnect the ECM connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Standard Resistance (Check for Short):

(e) Reconnect the ECM connector.

(f) Reconnect the engine room junction block assembly connector.

(g) Reinstall the engine room junction block assembly.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - ECM)
OK -- Continue to next step.

9. CHECK FUEL LINE

(a) Check the fuel lines for leaks or blockage.

OK:

No leaks or blockage.

NG -- REPAIR OR REPLACE FUEL LINE

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

10. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY VOLTAGE)

(a) Remove the engine room junction block assembly from the engine room relay block.

(b) Disconnect the engine room junction block assembly connector.

(c) Turn the ignition switch to ON.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(e) Reconnect the engine room junction block assembly connector.

(f) Reinstall the engine room junction block assembly.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGN FUSE - ENGINE ROOM JUNCTION BLOCK ASSEMBLY)
OK -- Continue to next step.

11. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - ECM)

(a) Remove the engine room junction block assembly from the engine room relay block.

(b) Disconnect the engine room junction block assembly connector.

(c) Disconnect the ECM connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Standard Resistance (Check for Short):

(b) Disconnect the engine room junction block assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration