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:
Problem symptoms table
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "suspected area"
column of the table. Check each symptom by checking the
suspected areas in the order they are listed. Re ...
Axle system
Problem symptoms table
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms are
listed in order of probability in the "suspected area" column of
the table. Check each symptom by checking the suspected
areas in the order th ...
Evaporator temperature sensor circuit
Description
The no. 1 Cooler thermistor (evaporator temperature sensor) is installed on
the evaporator in the air
conditioning unit to detect the temperature of the cooled air that has passed
through the evaporator and to
control the air conditioner. It sends signals to the air conditioni ...