DTC P0724: Brake Switch "B" Circuit High: Procedure

WARNING: This page is about a different car, the 2010 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.

READ VALUE USING DATA LIST (STP SIGNAL)

HINT:

Using the Techstream 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.

NOTE:

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.

Turn the ignition switch off.
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / ECT / Data List.

According to the display on the Techstream, read the Data List.

Standard

Item	Measurement Item/ Range (display)	Normal Condition
Stop Light Switch	Stop light switch status/ ON or OFF	Brake pedal is depressed: ON Brake pedal is released: OFF

NOTE:

In the table above, the conditions listed under "Normal Condition" are reference conditions. Do not depend solely on these reference conditions when deciding whether a part is faulty.

Result

Result	Proceed to
OK	B
NG	A

B → See step 3

A: Go to next step

INSPECT STOP LIGHT SWITCH ASSEMBLY

Remove the stop light switch assembly.

Fig 1: Inspecting Stop Light Switch Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

NG → REPLACE STOP LIGHT SWITCH ASSEMBLY

OK: Go to next step

CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - TCM)

Install the stop light switch assembly.

Fig 2: Install The Stop Light Switch Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Connect the stop light switch connector.
Disconnect the TCM connector.

Measure the voltage according to the value(s) in the table below when the brake pedal is depressed and released.

Standard Voltage

Tester Connection	Condition	Specified Condition
C63-12 (STP) - Body ground	Brake pedal is depressed	7.5 to 14 V
C63-12 (STP) - Body ground	Brake pedal is released	Below 1 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 4

REPLACE TCM. Refer to REMOVAL