F17538
Brake Actuator with ECU
A22 STP
10
R6
Stop Light LH
3F
3F
3F
3F
3F
3F
3F
10
5
9
8
6
4
7
J/B No.3
R7
Stop Light RH
4
3
21
W–B
IG
W–B
W–B
1A
1J
2
1
1
IG1
H8
High Mount
Stop Light
S5
Stop Light Switch
1
2
1F
2
J/B
No.1
J/B No.1
W–B
4
3
6
To Shift Lock
Control Relay
To Cruise
Control ECU
From
Battery
1K
2
B–R
BN7
To Engine
ECM
BN7
2
8
8
G–W
G–W
G–W
G–W
G–W
G–W
(A/T)
G–W
G–W
G–W
W–B
G–W
W–B
STOPDI–572
–
DIAGNOSTICS
ANTI–LOCK BRAKE SYSTEM
834
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
DTC
C1249 / 49
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
DTC No.
Detection Item
Trouble Area
C1249 / 49
This stop light switch senses whether the brake pedal is de-
pressed or released, and sends the signal to the ECU.
Stop light switch
Skid control ECU
Wire harness
WIRING DIAGRAM
INSPECTION PROCEDURE
1
Check operation of stop light.
CHECK:
Check that stop light lights up when brake pedal is depressed and lights off when brake pedal is released.
NG
Repair stop light circuit (See page BE–2).
OK
DIB1B–01
F17531
STP
(+)
(–)
–
DIAGNOSTICS
ANTI–LOCK BRAKE SYSTEM
DI–573
835
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
2
Check voltage between terminal STP of skid control ECU and body ground.
PREPARATION:
Disconnect skid control ECU connector.
CHECK:
Measure voltage between terminal STP (10) of skid control
ECU harness side connector and body ground when brake
pedal is depressed.
OK:
Voltage: 8 – 14 V
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page DI–545).
NG
3
Check for open in harness and connector between skid control ECU and stop
light switch (See page IN–28).
NG
Repair or replace harness or connector.
OK
Check and replace brake actuator ASSY.