Toyota Corolla Repair Manual: Inspection procedure
1 Inspect ecm(+b voltage)
- Turn the ignition switch on.
- measure the voltage between the terminals of the e4 and e6 ecm connectors.
Standard:
2 Check harness and connector(ecm – body ground)
- Disconnect the e4 ecm connector.
- check the resistance between the wire harness side connectors.
Standard (check for open):
- Reconnect the ecm connector
3 Inspect ignition or starter switch assy
- Disconnect the i10 ignition switch connector.
- check for continuity between the connector terminals shown in the chart below.
- Reconnect the ignition switch connector.
4 Check fuse(efi fuse)
- Remove the efi fuse from the engine room r/b.
- check for continuity in the efi fuse.
Standard: continuity
- reinstall the efi fuse.
5 Inspect efi relay
- Remove the efi relay from the engine room r/b.
- check for continuity in the circuit efi relay.
Standard:
- Reinstall the efi fuse.
6 Check harness and connector(efi relay – ecm, efi relay – body ground)
- Check the harness and connector between the efi relay and ecm.
- Remove the efi relay from the engine room r/b.
- Disconnect the e6 ecm connector.
- Check the resistance between the wire harness side connectors.
Standard (check for open):
Standard (check for short):
- Reconnect the ecm connector.
- Reinstall the efi relay.
- check the harness and connector between the efi relay and body ground.
- Remove the efi relay from the engine room r/b.
- Check the resistance between the wire harness side connector and body ground.
Standard (check for open):
- Reinstall the efi relay.
Check and repair harness and connector (terminal +b of ecm – battery positive terminal)
Circuit description
When the ignition switch is turned on, battery positive voltage is applied to
the coilwhich closes the contacts
of the efi main relay (marked: efi) and supplies power to terminal +b of the ecm.
...
Other materials:
Circuit description
When driving uphill under cruise control, in order to reduce the number of
shifting due to on–off overdrive
operation and to provide smooth driving, when down shifting in the
electronically controlled transmission occurs,
a signal to prevent upshift until the end of the uphill slope is sent fr ...
Throttle body assy
Components
Removal & installation and disassembly & reassembly
1. Drain coolant
2. Remove cylinder head cover no.2
Remove 2 nuts, 2clips and the cylinder head cover no. 2.
3. Remove air cleaner cap sub–assy
Disconnect the maf connector.
disconnect the vsv conn ...
Circuit description
Refer to dtc p0130
Hint:
the ecm provides a pulse width modulated control circuit to adjust current
through the heater. The heated
oxygen sensor heater circuit uses a relay on the b+ side of the circuit.
Monitor description
The ecm uses the heated oxygen sensor information to regulate t ...