N19613
22
1 2
4
3
10 16Cruise Control ECU
1B
I1 S11
S11G-W
B-W
Cruise Control Actuator R/B No.2
Battery
B 2A2
ALT
W-LJ/B No.1
STOP10
C16
L STP-
2 W-L
S11 S11
C16
POWERR-LR-LWStop Light Switch
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-687
915 Author: Date:
1997 SUPRA (RM502U)
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
When the brake is on, battery positive voltage normally applies through the STOP fuse and stop light switch
to terminal STP- of the ECU, and the ECU turns the cruise control off.
A fail-safe function is provided so that cancel functions normally, even if there is a malfunction in the stop
light signal circuit.
If the harness connected to terminal STP- has an open circuit, terminal STP- will have battery positive volt-
age and the cruise control will be turned off.
Also, when the brake is on, the magnetic clutch is cut mechanically by the stop light switch, turning the cruise
control off. (See page DI-675 for operation of the magnetic clutch)
WIRING DIAGRAM
DI4XX-01
8
B HOW TO USE THIS MANUAL
The Current Flow Chartº section, describes which parts each power source (fuses, fusible links, and circuit
breakers) transmits current to. In the Power Source circuit diagram, the conditions when battery power is
supplied to each system are explained. Since all System Circuit diagrams start from the power source, the power
source system must be fully understood.
* The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
H POWER SOURCE (CURRENT FLOW CHART)
The chart below shows the route by which current flows from the battery to each electrical source (Fusible Link, Circuit Breaker, Fuse,
etc.) and other parts.
The next page and following pages shown the parts to which each electrical source outputs current.
POWER SOURCE
