СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ, Diagnostic DTC:P0724

DESCRIPTION

The purpose of this circuit is to prevent the engine from stalling when the brakes are suddenly applied while driving in lock-up.

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.

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 TCM interprets this as a fault in the stop light switch, illuminates the MIL and 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 two consecutive driving cycles in order for this DTC to be stored.

INSPECTION PROCEDURE

1. DATA LIST

   Tip:

   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.

   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.

   
   

   1. Warm up the engine.

   2. Turn the ignition switch off.

   3. Connect the intelligent tester to the DLC3.

   4. Turn the ignition switch to ON.

   5. Turn the intelligent tester on.

   6. Enter the following menus: Powertrain / ECT / Data List.

   7. According to the display on the tester, read the Data List.

      Table 1. ECT

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Stop Light Switch	Stop light switch status/ ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

PROCEDURE

1. Click here

   READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the intelligent tester on.

   4. Enter the following menus: Powertrain / ECT / Data List / Stop Light Switch.

   5. Read the value displayed on the intelligent tester when the brake pedal is depressed and released.

      OK
      Tester Display Measurement Item/Range Normal Condition Stop Light Switch Stop light switch status/ ON or OFF ON: Brake pedal depressed OFF: Brake pedal released

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK FOR INTERMITTENT PROBLEMSClick here

3. Click here

   CHECK STOP LIGHT SWITCH INSTALLATION

   
   

   1. Check the stop light switch assembly installation (Click here).

      OK
      Stop light switch is installed correctly.

   
   
   • OKClick here
   • NGClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - TCM)

   
   

   1. Disconnect the A55 stop light switch connector.

   2. Disconnect the C29 TCM connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition A55-3 (L) - C29-12 (STP) Always Below 1 Ω A55-3 (L) - Body ground Always 10 kΩ or higher C29-12 (STP) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
5. Click here

   CHECK STOP LIGHT SWITCH ASSEMBLY

   
   

   1. Check the stop light switch assembly (Click here).

   
   
   • OKClick here
   • NGClick here
6. Click here

   REPLACE TCMClick here

7. Click here

   SECURELY REINSTALL STOP LIGHT SWITCH ASSEMBLYClick here

8. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

9. Click here

   REPLACE STOP LIGHT SWITCH ASSEMBLYClick here