AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P070312

DESCRIPTION

The purpose of the stop light switch signal 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, the stop light switch assembly sends a signal to the ECM. The ECM 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 ECM interprets this as a malfunction of the stop light switch assembly, illuminates the MIL and stores this DTC. The vehicle must GO (30 km/h (19 mph) or more) and STOP (less than 3 km/h (2 mph)) 5 times for 2 consecutive driving cycles in order for this DTC to be stored.

CONFIRMATION DRIVING PATTERN

1. Connect the GTS to the DLC3.

2. Turn the engine switch on (IG) and turn the GTS on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4. Turn the engine switch off and wait for 2 minutes or more.

5. Turn the engine switch on (IG) and turn the GTS on.

6. Start the engine.

7. Repeat the following procedure 5 times:




• Accelerate the vehicle to 30 km/h (19 mph) or more, depress the brake pedal and decelerate the vehicle to less than 3 km/h (2 mph).

8. Stop the vehicle.

9. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.

10. Input the DTC: P070312.

11. Check the DTC judgment result.

    GTS Display	Description
    NORMAL	DTC judgment completed System normal
    ABNORMAL	DTC judgment completed System abnormal
    INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
    N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips

    
    

    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

Refer to SFI system DTC P05042B.

Click here

CAUTION / NOTICE / HINT

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 / Transmission / Data List / Stop Light SW.

   7. Read the Data List according to the display on the GTS.

      
      Powertrain > Transmission > Data List

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

      
      Powertrain > Transmission > Data List

      Tester Display
      Stop Light SW

PROCEDURE

1. READ VALUE USING GTS

   
   

   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 / Transmission / Data List / Stop Light SW.

   5. Read the Data List according to the display on the GTS.

      
      Powertrain > Transmission > Data List

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

      
      Powertrain > Transmission > Data List

      Tester Display
      Stop Light SW

      Result
      Result Proceed to Data List value is normal A Data List value is not normal B

   
   

   A

   SYMPTOM SIMULATION AND DTC CHECK Click here

   B

2. CHECK STOP LIGHT SWITCH ASSEMBLY INSTALLATION

   
   

   1. Check the stop light switch assembly installation condition.

      Click here

      OK
      Stop light switch assembly is installed correctly.

      Result
      Proceed to OK NG

   
   

   NG

   REINSTALL STOP LIGHT SWITCH ASSEMBLY CORRECTLY Click here

   OK

3. INSPECT STOP LIGHT SWITCH ASSEMBLY

   
   

   1. Inspect the stop light switch assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

   OK

4. CHECK TERMINAL VOLTAGE (STP VOLTAGE)

   
   

   1. Disconnect the A24 ECM connector.

      

      *a	Brake pedal depressed	*b	Brake Pedal Released
      *c	Front view of wire harness connector (to ECM)	-	-

   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition A24-21 (STP) - Body ground Brake pedal released Below 1.5 V Brake pedal depressed 7.5 to 14 V

      Tech Tips

      If there is a short in the STP terminal circuit, there may be a malfunction in the circuit of a connected ECU.

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM)

   OK

5. REPLACE ECM

   
   

   1. Replace the ECM.

      Click here

      Result
      Proceed to NEXT

   
   

   NEXT

   PERFORM REGISTRATION Click here