Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - AB60F AUTOMATIC TRANSMISSION / TRANSAXLE
CHECK HARNESS AND CONNECTOR (BATTERY - ECM)
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 Code | DTC Detection Condition | Trouble Area |
| P0724 | The stop light switch remains on even when the vehicle is driven in a STOP (less than 3 km/h (2 mph)) and GO (30 km/h (19 mph) or more) 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 "stop and go" driving, the ECM interprets this as a fault in the stop light switch, the MIL comes on and the ECM stores the DTC. The vehicle must stop (less than 3 km/h (2 mph)) and go (30 km/h (19 mph) or more) five times for 2 driving cycles in order to detect a malfunction.
WIRING DIAGRAM
INSPECTION PROCEDURE
| DATA LIST |
- HINT:
- Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic 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.
Warm up the engine.
Turn the ignition switch off.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the intelligent tester on.
Enter the following menus: Powertrain / ECT / Data List.
According to the display on the tester, read the Data List.
| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| Stop Light Switch | Stop light switch status/ ON or OFF | Brake pedal: Depressed: ON 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 3 - 4 Pin pushed Below 1 Ω 1 - 2 Pin pushed 10 kΩ or higher 3 - 4 Pin not pushed 10 kΩ or higher
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| OK | |
| 2.CHECK HARNESS AND CONNECTOR (BATTERY - ECM) |
Disconnect the ECM connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
for LHD Tester Connection Condition Specified Condition A38-36 (STP) - Body ground Brake pedal depressed 11 to 14 V A38-36 (STP) - Body ground Brake pedal released Below 1 V for RHD Tester Connection Condition Specified Condition A52-36 (STP) - Body ground Brake pedal depressed 11 to 14 V A52-36 (STP) - Body ground Brake pedal released Below 1 V
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| OK | ||
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