Toyota FJ Cruiser (GSJ 10, 15 series). Instruction - part 81

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–279

ES

NOTICE:
If P0630 is set, the VIN must be input to the ECM 
using an intelligent tester. However, all DTCs are 
cleared automatically by the tester when inputting 
the VIN. If DTCs other than P0630 are set, check 
them first.

B

A

Refer to REGISTRATION (See page 

ES-15

).

NEXT

GO TO DTC CHART (See page 

ES-57

)

2

INPUT VIN WITH INTELLIGENT TESTER

END

ES–280

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

DESCRIPTION

The purpose of this circuit is to prevent the engine from stalling, while driving in lock-up condition, when 
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signals to the ECM. Then the ECM cancels the 
operation of the lock-up clutch while braking is in progress.

MONITOR DESCRIPTION

This DTC indicates that the stop light switch remains ON. When the stop light switch remains ON during 
"stop and go" driving, the ECM interprets this as a fault in the stop light switch and the MIL comes on and 
the ECM stores the DTC. The vehicle must stop (less than 1.86 mph (3 km/h)) and go (18.65 mph (30 km/
h) or more) 5 times during 2 driving cycles, in order to detect a malfunction.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

The stop light switch remains ON during GO and STOP 5 times.
GO and STOP are defined as follows;

TYPICAL MALFUNCTION THRESHOLDS

DTC

P0724

Brake Switch "B" Circuit High

DTC No.

DTC Detection Conditions

Trouble Areas

P0724

The stop light switch remains ON even when the vehicle 
repeats 5 cycles of STOP (less than 1.86 mph (3 km/h)) and 
GO (18.65 mph (30 km/h) or more) (2 trip detection logic)

•

Short in stop light switch signal circuit

•

Stop light switch

•

ECM

Related DTCs

P0724: Stop light switch/Range check/Rationality

Required sensors/Components (Main)

Stop light switch

Required sensors/Components (Related)

Speed sensor

Frequency of Operation

Continuous

Duration

5 times

MIL Operation

2 driving cycles

Sequence of Operation

None

Monitor will run whenever following DTCs not present

None

GO: Vehicle speed

18.65 mph (30 km/h) or more

STOP: Vehicle speed

Less than 1.86 mph (3 km/h)

Stop light switch status

Stuck ON

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–281

ES

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:
Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when 
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was 
moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other 
data, from the time the malfunction occurred.

1

2

High Mounted 
Stop Light

Stop

Stop

STOP

ALT

Battery

IGN

IG1

Stop Light Switch

Skid Control ECU

STOP LP CTRL

ECM

ST1-

STP

Rear Combination  
Light (RH)

Rear Combination  
Light (LH)

1

2

1

3

1

3

T1

L14

L11

15

E47

16

E47

STP0 A4

5

1

3

2

4

3

2

4

1

A3

16

A133421E01

ES–282

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON and turn the tester ON.
(c) Select the following menu items: DIAGNOSIS / 

ENHANCED OBD II / DATA LIST / PRIMARY / STOP 
LIGHT SW.

(d) Read the values displayed on the tester.

OK

OK

NG

NG

OK

NG

OK

1

READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SW)

Item

Measurement Item: Range (display)

Normal Condition

STOP LIGHT SW

Stop light switch status:

ON or OFF

•

ON: Brake pedal is depressed

•

OFF: Brake pedal is released

CHECK FOR INTERMITTENT PROBLEMS

2 

INSPECT STOP LIGHT SWITCH ASSEMBLY (See page 

ES-254

)

REPLACE STOP LIGHT SWITCH ASSEMBLY 
(See page 

LI-111

)

3 

CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - ECM) (See page 

ES-255

)

REPAIR OR REPLACE HARNESS OR 
CONNECTOR

REPLACE ECM (See page 

ES-446

)