Toyota RAV4 Service Manual: Stop light switch circuit
Description
While driving with the cruise control, if the ecm detects that the brake pedal is depressed, the cruise control operation will be canceled. The stop light switch sends brake pedal status signals to the ecm.
When the brake pedal is not depressed, terminal st1- is equal to the positive (+) battery voltage and terminal stp is below 1 v. When the brake pedal is depressed, the ecm cancels cruise control operation.
The ecm outputs this dtc when the voltage of terminals st1- and stp are both below 1 v for 0.5 Seconds or more at the same time. The fail-safe function operates to enable normal driving even if there is a malfunction in the stop light signal circuit.
Hint:
*: W/ vehicle stability control system
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: display changes according to brake pedal operation described in above table.
- Inspect fuse (stop, ign, ig2)
- Remove the stop and ign fuses from the instrument panel junction block.
- Remove the ig2 fuse from the engine room no. 1 Relay block.
- Measure the resistance of the fuses.
Standard resistance:
below 1 
- Inspect ig2 relay
- Remove the ig2 relay from the instrument panel junction block.
- Measure the resistance of the relay.
Standard resistance 
- Inspect stop light switch
- Remove the stop light switch.
- Measure the resistance of the switch.
Standard resistance 
- Check wire harness (switch - battery)
- Disconnect the a3 switch connector.
- Measure the voltage of the wire harness side connector.
Standard voltage 
- Check wire harness (ecm - battery)
- Disconnect the a9 ecm connector.
- Turn the ignition switch on.
- Measure the voltage of the wire harness side connector.
Standard voltage 
Replace ecm
Vehicle speed sensor
Description
Refer to the sfi system (see page es-224).
Wiring diagram
Refer to the sfi system (see page es-224).
Inspection procedure
Refer to the sfi system (see page es-224). ...
Input signal circuit abnormal
Description
This dtc expresses the internal abnormalities of the ecm.
Inspection procedure
Check for dtc
Clear the dtc (see page cc-15).
Check for dtc (see page cc-15).
Ok:
dtc i ...
Other materials:
Disassembly
Hint:
When removing the ornament plate and emblem, heat the
radiator grille, ornament plate and emblem using a heat light.
Standard heating temperature
Notice:
Do not heat the radiator grille, ornament plate and
emblem excessively.
Remove hood to radiator grille seal
Remove th ...
Removal
Disconnect cable from negative battery
terminal
Caution:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner activation.
Disconnect cable from positive battery
terminal
Remove battery clamp
...
Horn relay
On-vehicle inspection
Remove engine room no. 1 Relay block cover
Inspect integration relay (unit a: horn relay)
Using a screwdriver, detach the 2 claws and
disconnect the integration relay from the engine
room junction block.
Hint:
Tape the screwdriver tip before use.
Mea ...