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 the lock-up condition.

When the brake pedal is depressed, this switch sends a signal to the TCM. The TCM then cancels the operation of the lock-up clutch while braking is in progress.

MONITOR DESCRIPTION

This DTC indicates that the stop light switch is remaining on. When the stop light switch remains on during GO and STOP driving, the TCM interprets this as a fault in the stop light switch, then illuminates the MIL and stores the DTC. The vehicle must GO (30 km/h (18.65 mph) or more) and STOP (less than 3 km/h (1.86 mph)) 5 times for 2 driving cycles in order for the DTC to be output.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. DATA LIST

   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.

   Tech Tips

   Using the GTS 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.

   
   

   1. Warm up the engine.

   2. Turn the engine switch off.

   3. Connect the GTS to the DLC3.

   4. Turn the engine switch on (IG).

   5. Turn the GTS on.

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

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

      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. READ VALUE USING GTS (STOP LIGHT SWITCH)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the GTS on.

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

   5. According to the display on the GTS, read the Data List.

      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	-

      Result

      Result	Proceed to
      Data List value is within the normal condition	A
      Data List value is not within the normal condition	B

   
   

   B

   CHECK STOP LIGHT SWITCH ASSEMBLY INSTALLATION Click here

   A

   SYMPTOM SIMULATION AND DTC CHECK Click here

2. CHECK STOP LIGHT SWITCH ASSEMBLY INSTALLATION

   
   

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

      OK
      Stop light switch assembly is installed correctly.

   
   

   NG

   SETTINGS CORRECTLY

   OK

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

   
   

   1. Disconnect the A5 stop light switch assembly connector.

   2. Disconnect the A74 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A5-2 (L) - A74-23 (STP) Always Below 1 Ω A5-2 (L) or A74-23 (STP) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. INSPECT STOP LIGHT SWITCH ASSEMBLY

   
   

   1. Inspect the stop light switch assembly Click here.

   
   

   NG

   REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

   OK

5. REPLACE TCM

   
   

   1. Replace the TCM Click here.

   
   

   NEXT

   PERFORM A/T CODE REGISTRATION Click here