Toyota Corolla (E120): Circuit description
The door key lock and unlock switch is built in the door lock motor.
Wiring diagram

Inspection procedure
1 Check door lock


2 Check wire harness (tvip ecu door lock)

- Disconnect the tvip ecu and door lock connectors.
- check the continuity between the terminals of the tvip ecu and door lock connectors, as shown in the illustration and table.
Standard:



3 Check wire harness (door lock body ground)

- Disconnect the door lock connector.
- check the continuity between the terminal of the door lock connector and the body ground, as shown in the illustration and table.
Standard:



Proceed to next circuit inspection shown on problem symptoms table
Other materials:
Overhaul
1. Remove roof headlining assy
2. Remove sliding roof glass sub–assy
using a torx wrench (t25), remove the 4 screws the sliding roof
glass.
pull the glass upward to remove it.
3. Remove sliding roof weatherstrip
4. Remove sliding roof drive gear sub–assy
Notice:
...
Overhaul
1. Remove control shift lever bush
Remove the control shift lever bush from the selecting
bellcrank assy.
2. Remove selecting bellcrank dust cover no.1
Remove the selecting bellcrank dust cover no.1 From the
selecting bellcrank assy.
3. Remove selecting bell crank no.2
...
Inspection procedure
1 Check d squib circuit(airbag sensor assy center – horn button
assy)
Disconnect the negative (–) terminal cable from the battery,
and wait at least for 90 seconds.
disconnect the connectors between the airbag sensor
assy center and the horn button assy.
release the airbag ...


