Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Fuel pump control circuit / Inspection procedure
Toyota Corolla (E120): Inspection procedure
Hand–held tester:
1 Perform active test by hand–held tester(operation of circuit opening relay)
- Connect the hand–held tester to the dlc3.
- turn the ignition switch on and push the hand–held tester main switch on.
- select the item ”diagnosis / enhanced obd ii / active test / fuel pump / spd”.
- check the relay operation while operating it with the hand–held tester.
Standard: operating noise can be heard from the relay.
2 Inspect ecm power source circuit
3 Inspect circuit opening relay
- Remove the circuit opening relay from the instrument panel j/b.
- check for continuity in the circuit opening relay.
Standard:
- Reinstall the circuit opening relay.
4 Inspect ecm(fc voltage)
- Turn the ignition switch on.
- measure the voltage between the terminals of the e3 and e6 ecm connectors.
Standard:
5 Check harness and connector(efi relay – circuit opening relay)
- Remove the efi relay from the engine room r/b.
- remove the circuit opening relay from the instrument panel j/b.
- check the resistance between the wire harness side connectors.
Standard (check for open):
Standard (check for short):
- Reinstall the circuit opening relay.
- reinstall the efi relay.
Replace ecm
6 Inspect fuel pump
7 Check harness and connector(circuit opening relay – fuel pump, fuel pump – body ground)
- Remove the circuit opening relay from the instrument panel j/b.
- disconnect the f10 fuel pump connector.
- check the resistance between the wire harness side connectors.
Standard (check for open):
Standard (check for short):
- Reconnect the fuel pump connector.
- reinstall the circuit opening relay.
Replace ecm
Obd ii scan tool (excluding hand–held tester):
1 Check operation of fuel pump
- Turn the ignition switch on.
- connect between terminals fc and e01 of the ecm connector.
- check for fuel pressure in the fuel inlet hose when it is
pinched off.
Result: there is pressure in fuel inlet hose.
Hint
: at this time, you will hear the fuel flowing sound.
2 Inspect ecm power source circuit
3 Inspect circuit opening relay
- Remove the circuit opening relay from the instrument panel j/b.
- check for continuity in the circuit opening relay.
Standard:
- Reinstall the circuit opening relay.
4 Inspect ecm(fc voltage)
- Turn the ignition switch on.
- measure the voltage between the terminals of the e3 and e6 ecm connectors.
Standard:
5 Check harness and connector(efi relay – circuit opening relay)
- Remove the efi relay from the engine room r/b.
- remove the circuit opening relay from the instrument panel j/b.
- check the resistance between the wire harness side connectors.
Standard (check for open):
Standard (check for short):
- Reinstall the circuit opening relay.
- reinstall the efi relay.
Replace ecm
6 Inspect fuel pump
7 Check harness and connector(circuit opening relay – fuel pump,fuel pump – body ground)
- Remove the circuit opening relay from the instrument panel j/b.
- disconnect the f10 fuel pump connector.
- check the resistance between the wire harness side connectors.
Standard (check for open):
Standard (check for short):
- Reconnect the fuel pump connector.
- reinstall the circuit opening relay.
Replace ecm
Other materials:
Shifting the shift lever to R
Shift the shift lever to R while lifting up the ring section.
■Maximum allowable speeds
Observe the following maximum allowable speeds in each gear when maximum acceleration
is necessary.
mph (km/h)
NOTICE
■To prevent damage to the transmission
●Do not lift up the ring ...
Aluminum wheel precautions (if equipped)
● Use only Toyota wheel nuts and wrenches designed for use with your aluminum
wheels.
● When rotating, repairing or changing your tires, check that the wheel nuts are
still tight after driving 1000 miles (1600 km).
● Be careful not to damage the aluminum wheels when using tir ...
Ecu power source circuit
Circuit description
This circuit provides power to operate the tvip ecu.
Wiring diagram
Inspection procedure
1 Check fuse (ecu–b)
Remove the fuse from the instrument panel j/b.
check the continuity of the fuse.
Standard: continuity
2 Check tvip ecu
Disconnect ...