DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling when brakes are suddenly applied while driving in lock-up condition.
When the brake pedal is depressed, the stop light 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 |
The stop light switch remains on even when the vehicle repeats 5 cycles of STOP (less than 3 km/h [1.86 mph]) and GO (30 km/h [18.65 mph] or more) (2 trip detection logic). |
|
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 ECM turns on 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) 5 times during 2 driving cycles, in order to detect a malfunction.
MONITOR STRATEGY
Related DTCs |
P0724: Brake Pedal Position Switch Verify Input Signal |
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 |
TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored |
None |
All of the following conditions are met |
- |
Battery voltage |
8 V or higher |
Starter |
Off |
Ignition switch |
ON |
GO: Vehicle speed |
30 km/h (18.65 mph) or more |
STOP: Vehicle speed |
Less than 3 km/h (1.86 mph) |
TYPICAL MALFUNCTION THRESHOLDS
Brake pedal position switch |
On stuck |
CONFIRMATION DRIVING PATTERN
HINT:
Techstream Display |
Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
N/A |
|
HINT:
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
WIRING DIAGRAM
Refer to DTC P0504 (See page ).
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Stop Light Switch.
(e) Read the values displayed on the Techstream.
OK:
Item |
Measurement Item/Range (display) |
Normal Condition |
---|---|---|
Stop Light Switch |
Stop light switch status: ON or OFF |
|
OK | ![]() |
CHECK FOR INTERMITTENT PROBLEMS |
|
2. |
INSPECT STOP LIGHT SWITCH ASSEMBLY |
(a) Inspect the stop light switch assembly (See page
).
NG | ![]() |
REPLACE STOP LIGHT SWITCH ASSEMBLY |
|
3. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - ECM) |
(a) Disconnect the ECM connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A49-29 (STP) - Body ground |
Brake pedal released |
Below 1.5 V |
Brake pedal depressed |
7.5 to 14 V |
*a |
Brake pedal depressed |
*b |
Brake pedal released |
*c |
Front view of wire harness connector (to ECM) |
- |
- |
OK | ![]() |
REPLACE ECM |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Pressure Control Solenoid "G" Performance (Shift Solenoid Valve SL4) (P2808)
DESCRIPTION
The TCM uses the vehicle speed signal and signals from the transmission speed
sensors (NC, NT) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear).
Then the TCM compares the actual gear with the shift schedule in the TCM memory
to ...
Data List / Active Test
DATA LIST / ACTIVE TEST
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 bec ...
Speed Sensor(when Using The Engine Support Bridge)
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. REMOVE TRANSMISSION VALVE BODY ASSEMBLY
See page
2. REMOVE SPEED SENSOR
(a) Disconnect the speed sensor connector.
(b) Remove the 2 bolts and speed sensor from the tra ...