DTC    P1862    Clutch Control System 2


DESCRIPTION

There are 2 clutch pedal switches for the clutch pedal. The clutch switch (upper) is used for stopping and restarting the engine due to Stop and Start system control. In the Stop and Start system control, the clutch start switch (lower) is used only when the clutch switch (upper) is stuck on or the fail-safe function is activated.

DTC No.
DTC Detection Condition
Trouble Area
P1862
Both of the following conditions continue for 0.5 seconds or more (1 trip detection logic):
  1. Clutch start switch (lower) ON.
  2. Clutch switch (upper) ON.
  1. Clutch start switch (lower)
  2. Clutch switch (upper)
  3. Harness or connector
  4. Engine stop and start ECU

HINT:
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).


After troubleshooting, perform the following steps to recheck for DTCs and check if the Stop and Start system operates normally.

HINT:
  1. If the ECM learned values have been cleared by disconnecting the battery or for another reason, Stop and Start system control will be prohibited until ECM learning completes.
  2. 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 intelligent tester to the DLC3.

  2. Clear the DTCs (Click here).

  3. Start the engine.



    4. A206932E01

  4. Fully depress the clutch pedal for 1 second or more. Release the clutch pedal and wait for at least 1 second.

  5. Repeat the previous step 3 times.

  6. Check that no DTCs are output (Click here).


Check if the Stop and Start system operates normally.

HINT:
If the battery terminal has been disconnected, the ECO OFF indicator will be illuminated. In this case, drive the vehicle for 15 to 40 minutes to turn off the indicator.

  1. Warm up the engine.

  2. Turn the air conditioning system off.

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

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

  5. Check that the engine stops.

  6. Depress the clutch pedal and check that the engine restarts.


WIRING DIAGRAM


A217700E01


A217701E01


INSPECTION PROCEDURE

NOTICE:
  1. If the engine stop and start ECU is being replaced, register the previously recorded number of starter operations into the new engine stop and start ECU (Click here).
  2. After the engine stop and start ECU is replaced or after an air conditioner kit is installed, clear the A/C information stored in the engine stop and start ECU (Click here).
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.READ VALUE USING INTELLIGENT TESTER (CLUTCH UPPER AND LOWER SIGNAL)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

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

  1. Depress the clutch pedal and read the values displayed on the tester.

    OK:

    Item
    		Clutch Pedal Condition
    		Tester Display
    Clutch Upper SW
    		Fully Depressed
    		OFF
    Clutch Lower SW
    		Fully Depressed
    		ON
    Clutch Upper SW
    		Fully Released
    		ON
    Clutch Lower SW
    		Fully Released
    		OFF



NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (Click here)  

2.INSPECT CLUTCH SWITCH (UPPER)

  1. Inspect the clutch switch (upper) (Click here).



NG
REPLACE CLUTCH SWITCH (UPPER) (Click here)
OK


3.INSPECT CLUTCH START SWITCH (LOWER)

  1. Inspect the clutch start switch (lower) (Click here).



NG
REPLACE CLUTCH START SWITCH (LOWER) (Click here)
OK


4.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - CLUTCH SWITCH UPPER)

  1. Disconnect the engine stop and start ECU connector.

  1. Disconnect the clutch switch (upper) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D79-20 (CLU) - A30-2
    		Always
    		Below 1 Ω
    D79-20 (CLU) or A30-2 - Body ground
    		Always
    		10 kΩ or higher

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D79-20 (CLU) - Body ground
    		Ignition Switch ON
    		Below 1 V

  1. Turn the ignition switch off.

  1. Reconnect the engine stop and start ECU connector.

  1. Reconnect the clutch switch (upper) connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - CLUTCH START SWITCH LOWER)

  1. Disconnect the engine stop and start ECU connector.

  1. Disconnect the clutch start switch (lower) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D79-13 (CLL) - A29-2
    		Always
    		Below 1 Ω
    D79-13 (CLL) - Body ground
    		Always
    		10 kΩ or higher
    A29-2 - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the engine stop and start ECU connector and clutch start switch (lower) connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ENGINE STOP AND START ECU (Click here)