- Short in stop light switch assembly signal circuit
- Stop light switch assembly
- TCM
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VIKT |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 08/2016] |
| Title: U660E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P0724; Brake Switch "B" Circuit High; 2016 MY Sienna [12/2015 - 08/2016] | ||
|
DTC |
P0724 |
Brake Switch "B" Circuit High |
DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling when the brakes are suddenly applied while driving in the lock-up condition.
When the brake pedal is depressed, this switch sends a signal to the TCM. Then the TCM cancels the operation of the lock-up clutch while braking is in progress.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
P0724 |
The stop light switch assembly remains ON even when the vehicle is driven in a STOP (less than 3 km/h (1.86 mph)) and GO (30 km/h (18.65 mph) or more) fashion 5 times. (2 trip detection logic). |
|
MONITOR DESCRIPTION
This DTC indicates that the stop light switch assembly remains ON. When the stop light switch assembly remains ON during "stop and go" driving, the TCM interprets this as a fault in the stop light switch assembly, illuminates the MIL, and stores the DTC. The vehicle must stop (less than 3 km/h (1.86 mph)) and go (30 km/h (18.65 mph) or more) five times for two consecutive driving cycles in order to set this DTC.
MONITOR STRATEGY
|
Related DTCs |
P0724: Stop light switch/Range check/Rationality |
|
Required sensors/Components |
Stop light switch assembly |
|
Frequency of operation |
Continuous |
|
Duration |
GO and STOP 5 times |
|
MIL operation |
2 driving cycles |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
The stop light switch assembly remains ON during GO and STOP 5 times.
GO and STOP are defined as follows;|
The monitor will run whenever this DTC is not present. |
None |
|
GO: (Vehicle speed is 30 km/h (18.65 mph) or more) |
30 km/h (18.65 mph) or more |
|
STOP: (Vehicle speed is less than 3 km/h (1.86 mph)) |
Less than 3 km/h (1.86 mph) |
|
Starter |
OFF |
|
Battery voltage |
8 V or more |
|
Ignition switch |
ON |
TYPICAL MALFUNCTION THRESHOLDS
|
Switch status |
ON |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
-
Perform the universal trip to clear permanent DTCs (See page
![2016 MY Sienna [12/2015 - 08/2016]; U660E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
).
1. DATA LIST
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.
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.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / ECT / Data List / All Data.
(g) According to the display on the Techstream, read the Data List.
ECT
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Stop Light Switch |
Stop light switch status assembly / ON or OFF |
Brake pedal is
|
- |
PROCEDURE
|
1. |
INSPECT STOP LIGHT SWITCH ASSEMBLY |
(a) Inspect the stop light switch assembly (for Bulb Type Stop Light) (See page
).
(b) Inspect the stop light switch assembly (for LED Type Stop Light) (See page
).
| NG |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - TCM) |
|
(a) Install the stop light switch assembly. |
|
(b) Connect the stop light switch assembly connector.
(c) Disconnect the TCM connector.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
B2-12 (STP) - Body ground |
Brake pedal is depressed |
7.5 to 14 V |
|
Brake pedal is released |
Below 1 V |
Text in Illustration
|
*a |
Front view of wire harness connector: (to TCM) |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|