STOP AND START SYSTEM(for 2AR-FE) Stop and Start Priority Control System

DESCRIPTION

In stop and start control status, there is normal status (Standard) and stop and start priority status (Extended).

Stop and start control status can be switched to the desired mode by pressing and holding the stop and start system cancel switch (combination switch assembly), or by operating the steering pad switch assembly, and the mode change is also shown on the multi-information display screen.

When the mode has been switched by pressing and holding the stop and start system cancel switch (combination switch assembly), a signal is sent directly from the stop and start system cancel switch (combination switch assembly) to the engine stop and start ECU.

When the steering pad switch assembly is used to select a control mode, a status change request signal is sent from the combination meter assembly to the engine stop and start ECU via CAN communication.

Cooperative control is performed by the air conditioning amplifier assembly and engine stop and start ECU based on the selected control mode.

When stop and start priority control (Extended) is selected, the operation time of stop and start control will be extended in order to improve fuel economy.

WIRING DIAGRAM

B006OVXE02

CAUTION / NOTICE / HINT

Note


  • When replacing the engine stop and start ECU with a new one, make sure to download the previous status (number of starter operations) of the old engine stop and start ECU. After replacing the engine stop and start ECU, turn the engine switch on (IG) and wait 20 seconds, then confirm that "OK" is displayed for the Data List item [Stop&Start Operating Permission (Discharged Oil Pump Air)]. Then upload the previous status (number of starter operations) to the 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 airbag ECU assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU, perform learning of the external backup boost converter (eco run vehicle converter assembly).

    Click here

Tech Tips


  • When stop and start priority control (Extended) is selected, the operation of the air conditioning system is limited. If the customer reports that the cooling effectiveness of the air conditioning system is poor, check the selected control mode. If stop and start priority control (Extended) is selected, cancel the control mode and check if the cooling effectiveness of the air conditioning system improves. If it improves, explain to the customer that the operation of the air conditioning system was limited by stop and start control.

  • Depending on the vehicle conditions, the stop and start operation time may not change even if stop and start priority control (Extended) is selected.

PROCEDURE


  1. CHECK PROBLEM SYMPTOMS


    1. Check the problem symptoms.

      Tech Tips


      • Check each symptom by checking the suspected areas in the table below.

      • By using the GTS and entering the following menus, the selected mode can be confirmed.

        Powertrain / Stop and Start / Data List / Stop & Start A/C Mode

      Result
      Problem Symptoms Trouble Area Proceed to
      Multi-information display screen does not change after pressing steering pad switch assembly

      • Steering pad switch assembly

      • Spiral with sensor cable sub-assembly

      • Combination meter assembly

      • Engine stop and start ECU

      • Wire harness or connector (steering pad switch assembly - combination meter assembly)

      • CAN communication system

      		 A
      When the stop and start system cancel switch (combination switch assembly) is pressed and held, control does not change

      • stop and start system cancel switch (combination switch assembly)

      • Engine stop and start ECU

      • Wire harness or connector (stop and start system cancel switch (combination switch assembly) - engine stop and start ECU)

      		 B
      Even though the stop and start system cancel switch (combination switch assembly) and steering pad switch assembly are operated, the multi-information display screen does not change, and control does not change

      • Engine stop and start ECU

      • CAN communication system

      		 C
      Multi-information display screen changes without pressing steering pad switch assembly

      • Steering pad switch assembly

      • Spiral with sensor cable sub-assembly

      • Wire harness or connector (steering pad switch assembly - combination meter assembly)

      		 D
      The status change interrupt display in the combination meter assembly is not displayed, but control changes Combination meter assembly E
      The status change interrupt display in the combination meter assembly is displayed, but control does not change

      • Air conditioning amplifier assembly

      • CAN communication system

      		 F
      Control mode returns to default mode after turning engine switch on (IG) Engine stop and start ECU G

    B

    GO TO STOP AND START CANCEL SWITCH CIRCUIT Click here

    C

    CHECK DTC OUTPUT Click here

    D

    CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - COMBINATION METER ASSEMBLY) Click here

    E

    GO TO METER / GAUGE SYSTEM Click here

    F

    CHECK DTC OUTPUT Click here

    G

    CHECK DTC OUTPUT Click here

    A

  2. CHECK OPERATION


    1. Using the steering pad switch assembly, check that all functions other than "Stop & Start Settings" can be selected.

      Result
      Result Proceed to
      Only "Stop & Start Settings" cannot be selected A
      No function can be selected using the steering pad switch assembly B

    B

    GO TO STEP 4 Click here

    A

  3. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Perform a road test.

    5. Enter the following menus: Powertrain / Stop and Start / Trouble Codes.

    6. Read the DTCs.


      Powertrain > Stop and Start > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      CAN DTCs are output B

    A

    REPLACE ENGINE STOP AND START ECU Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

  4. CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Disconnect the spiral with sensor cable sub-assembly connector.

    2. Disconnect the combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G4-10 (+DP) - G16-11 (MSM+) Always Below 1 Ω
      G4-11 (+DP2) - G16-12 (MSTI) Always Below 1 Ω
      G4-3 (EAU) - Body ground Always Below 1 Ω
      G4-10 (+DP) or G16-11 (MSM+) - Body ground and other terminals Always 10 kΩ or higher
      G4-11 (+DP2) or G16-12 (MSTI) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY


    1. Inspect the spiral with sensor cable sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

  6. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Inspect the steering pad switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    GO TO METER / GAUGE SYSTEM Click here

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

  7. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Perform a road test.

    5. Enter the following menus: Powertrain / Stop and Start / Trouble Codes.

    6. Read the DTCs.


      Powertrain > Stop and Start > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      CAN DTCs are output B

    A

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

  8. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Perform a road test.

    5. Enter the following menus: Powertrain / Stop and Start / Trouble Codes.

    6. Read the DTCs.


      Powertrain > Stop and Start > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    A

    REPLACE ENGINE STOP AND START ECU Click here

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here