Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Power door lock control system / Key confinement prevention function does not work
properly (unlock warning switch circuit)
Toyota Corolla (E120): Key confinement prevention function does not work properly (unlock warning switch circuit)
Circuit description
The unlock warning switch turns on when the key is inserted in the ignition key cylinder and the door courtesy switch turns on when the driver’s door is opened, and the integration relay monitors both switches conditions.
According to these switches conditions, the integration relay controls the door locking operation not to lock the doors while both switches are on, in order to prevent the key from being confined.
Wiring diagram
Inspection procedure
1 Inspect un–lock warning switch assy
- Remove the un–lock warning switch assy.
- inspect the un–lock warning switch assy continuity, as shown in the illustration and table.
Standard:
2 Check wire harness (un–lock warning switch instrument panel j/b)
- Disconnect the un–lock warning switch assy and instrument panel j/b connectors.
- check the continuity between the terminals of the un–lock
warning switch assy and instrument panel j/b connectors,
as shown in the illustration and table.
Standard (check for open):
3 Inspect front door courtesy lamp switch assy (driver’s side)
- Remove the courtesy lamp switch.
- inspect the courtesy lamp switch continuity, as shown in the illustration and table.
Standard:
4 Check wire harness (front door courtesy lamp switch assy [driver’s side] instrument panel j/b)
- Disconnect the courtesy lamp switch and instrument panel j/b connectors.
- check the continuity between the terminals of the courtesy lamp switch and instrument panel j/b connectors, as shown in the illustration and table.
Standard (check for open):
Replace integration relay
Other materials:
Circuit description
The airbag sensor front lh circuit consists of the airbag sensor assy center
and airbag sensor front lh.
Dtc b1158/b1159/16 is recorded when malfunction is detected in the airbag sensor
front lh circuit.
Wiring diagram
...
Pressing power switch does not start system
Wiring diagram
Inspection procedure
1 Inspect radio receiver assy(+b, acc, gnd)
Check that the continuity between terminals at each
condition, as shown in the chart.
Standard:
Check that the voltage between terminals at each condition,
as shown in the chart.
Standard:
...
Inspection procedure
Hint:
when the throttle position is slightly opened (the accelerator pedal
is slightly depressed) because a
floor carpet is overlapped on the accelerator pedal, or if not fully
releasing the accelerator pedal, etc.,
Dtc p505 will possibly be detected.
Read freeze frame data using the ...