Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 3UR-FE ENGINE CONTROL
CHECK HARNESS AND CONNECTOR (ECM - BATTERY)
DTC P0724 Brake Switch "B" Circuit High
DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while driving in the lock-up condition when the brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signal to the ECM. Then the ECM cancels the operation of the lock-up clutch while braking is in progress.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0724 | Stop light switch remains ON even when vehicle is driven in GO (30 km/h (18.63 mph) or more) and STOP (less than 3 km/h (1.86 mph)) pattern 5 times (2 trip detection logic) | Short in stop light switch signal circuit Stop light switch ECM |
MONITOR DESCRIPTION
This DTC indicates that the stop light switch remains ON. When the stop light switch remains ON during GO and STOP driving, the ECM interprets this as a fault in the stop light switch. Then the MIL illuminates and the ECM stores the DTC. The vehicle must GO (30 km/h (18.63 mph) or more) and STOP (less than 3 km/h (1.86 mph)) 5 times for 2 driving cycles in order for the DTC to be output.
WIRING DIAGRAM
Refer to DTC P0504 ().
INSPECTION PROCEDURE
- HINT:
- Using the GTS to read the Data List allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to save time.
- NOTICE:
- In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
| Item | Measurement Item/ Range (Display) | Normal Condition | Diagnostic Note |
| STOP LIGHT SW (Stop Light Switch) | Stop light switch status/ ON or OFF | Brake pedal is depressed: ON Brake pedal is released: OFF | - |
| 1.INSPECT STOP LIGHT SWITCH |
Remove the stop light switch.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition 1 - 2 Pin not pushed Below 1 Ω Pin pushed 10 kΩ or higher 3 - 4 Pin not pushed 10 kΩ or higher Pin pushed Below 1 Ω
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| OK | |
| 2.CHECK HARNESS AND CONNECTOR (ECM - BATTERY) |
Disconnect the ECM connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A38-36 (STP) - Body ground Brake pedal is depressed 11 to 14 V A38-36 (STP) - Body ground Brake pedal is released Below 1 V
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| OK | ||
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