Toyota RAV4 Service Manual: Open in stop light switch circuit
Description
The skid control ecu detects the brake operating conditions through a signal
transmitted by the stop light
switch. The skid control ecu incorporates an open circuit detection circuit.
This dtc is set under either of
the following conditions:
- An open is detected in the stop light signal input line when the stop
light switch is off.
- An open is detected in the stop light circuit lead to the ground when
the stop light switch is off.

Wiring diagram

Inspection procedure
- Read value of intelligent tester (stop light switch)
- Check the data list for proper functioning of the stop
light switch.

Ok:
on (brake pedal is depressed) appears on the
screen.

- Check wire harness (stp voltage)

- Disconnect the a19 ecu connector.
- Measure the voltage of the wire harness side connector.
Standard voltage 

Replace abs and traction actuator assembly
- Inspect fuse (stop, ecu-ig1)
- Remove the stop fuse and ecu-ig1 fuse from the
instrument panel junction block.
- Measure the resistance of the fuse.
Standard resistance:
below 1 

- Inspect stop light control relay (marking: brk)

- Remove the stop light control relay from the engine room
no. 1 Relay block.
- Measure the resistance of the relay.


- Inspect stop light switch assembly

- Disconnect the stop light switch connector.
- Measure the resistance of the switch.
Standard resistance 

- Check wire harness (skid control ecu - stop light switch)
- Disconnect the a19 ecu connector.
- Disconnect the a3 switch connector.
- Measure the resistance of the wire harness side
connectors.

- Disconnect the a19 ecu connector.
- Disconnect the a3 switch connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance 

- Reconfirm dtc
- Clear the dtc (see page bc-47).
- Check if the same dtc is output (see page bc-47).
Result 

Replace abs and traction actuator assembly
Description
The master cylinder pressure sensor is connected to the skid control ecu in
the abs and traction
actuator.
Dtc c1281/81 can be detected when the master cylinder pressure sensor ...
Description
The motor relay drives the pump motor based on a signal from the skid control
ecu.
Wiring diagram
Refer to dtc c0273/13, c0274/14, c1361/91 (see page bc-79).
Inspection proce ...
Other materials:
Diagnostic trouble code chart
Hint:
If no abnormality is found when inspecting parts, check the
skid control ecu and check for poor contact at the ground
points.
If a dtc is displayed during the dtc check, check the
circuit for the dtc listed in the table below. For details of
each dtc, refer to the page indicated. ...
Installation
Install knock sensor
Install the sensor with the nut.
Torque: 20 n*m (205 kgf*cm, 15 ft.*Lbf)
Notice:
Make sure that the knock sensor is in the
correct position.
Connect the sensor connector.
Install intake manifold insulator
install the intake manifold insulat ...
Rear seat outer belt assembly
Components
...