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.
...
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