STOP AND START SYSTEM, Diagnostic DTC:P0831

DTC Code DTC Name
P0831 Clutch Pedal Switch "A" Circuit Low

DESCRIPTION

DTC No. DTC Detection Condition Trouble Area
P0831

The following condition continues for 1.2 seconds or more (1 trip detection logic):


  • Clutch start switch assembly is stuck on

  • Clutch start switch assembly

  • Wire harness or connector

  • Engine stop and start ECU

CONFIRMATION DRIVING PATTERN

Tech Tips

DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs Click here.


  1. CONFIRMATION AFTER TROUBLESHOOTING

    Tech Tips


    • If the cable is disconnected from the negative (-) battery terminal, stop and start control is prohibited until refresh charge is completed. In this case, drive the vehicle approximately 5 to 40 minutes until refresh charge is completed and stop and start control operation is permitted.

    • Allow the engine to idle for 3 minutes after the engine warms up and check that the engine speed is within 50 rpm of the target idle speed.


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Start the engine.

    5. A004O8FE07
      *a Clutch Switch Signal
      *b ON
      *c OFF
      *d 2 seconds or more

      Fully depress the clutch pedal for 2 seconds or more. Release the clutch pedal and wait for at least 2 seconds.

    6. Repeat the previous step 3 times.

    7. Check that no DTCs are output Click here.

  2. STOP AND START SYSTEM OPERATION CHECK

    Tech Tips

    If the cable is disconnected from the negative (-) battery terminal, stop and start control is prohibited until refresh charge is completed. In this case, drive the vehicle approximately 5 to 40 minutes until refresh charge is completed and stop and start control operation is permitted.


    1. Start the engine and warm it up.

    2. Turn the air conditioning system off.

    3. Drive the vehicle at 7 km/h (4.3 mph) or more.

      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    4. Stop the vehicle, move the shift lever to neutral and release the clutch pedal.

    5. Allow the engine to stop by stop and start control.

    6. Depress the clutch pedal and start the engine.

WIRING DIAGRAM

A004N6KE02
A004T0YE02

CAUTION / NOTICE / HINT

Note


  • Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU Click here.

  • After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU Click here.

  • After replacing the engine stop and start ECU or yaw rate sensor, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU Click here.

Tech Tips

Using the GTS, read the freeze frame data before troubleshooting. System condition information is recorded as freeze frame data the moment a DTC is stored. This information can be useful when troubleshooting Click here.

PROCEDURE


  1. READ VALUE USING GTS (CLUTCH LOWER SW)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Stop and Start / Data List / Clutch Lower SW.

    5. Depress the clutch pedal and read the values displayed on the GTS.

      OK
      GTS Display Condition Normal Condition
      Clutch Lower SW Fully Depressed ON
      Clutch Lower SW Fully Released OFF

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch assembly Click here.


    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - CLUTCH START SWITCH ASSEMBLY)


    1. Disconnect the A80 engine stop and start ECU connector.

    2. Disconnect the A3 clutch start switch assembly connector.

    3. w/ Entry and Start System:

      Disconnect the power management control ECU connector.

    4. w/o Entry and Start System:

      Disconnect the ignition or starter switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A80-28 (CLL) - A3-2 Always Below 1 Ω
      A80-28 (CLL) - Body ground Always 10 kΩ or higher
      A3-2 - Body ground Always 10 kΩ or higher

    OK

    REPLACE ENGINE STOP AND START ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR