Previa Van LE 4WD L4-2438cc 2.4L DOHC SC MFI (1997)
Brake Signal: Testing and Inspection
DTC P1520 Stop Light Switch Signal Malfunction
CIRCUIT DESCRIPTION
This signal is used to detect when the brakes have been applied. The STP signal voltage is the same as the voltage supplied to the stop lights.
The STP signal is used mainly to control the fuel cut-off engine speed. (The fuel cut-off engine speed is reduced slightly when the vehicle is
braking.)
DETECTING CONDITION
WIRING DIAGRAM
Step 1
