LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2025 >> Tacoma Trailhunter >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Stop And Start System - Diagnostic Codes >> Stop And Start System >> DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0114-87: Lost Communication with Four-Wheel Drive Clutch Control Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication With Brake System Control Module(ch2) Missing Message [12/2023 - ] >> Confirmation Driving Pattern
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Confirmation Driving Pattern

  1. CONFIRMATION AFTER TROUBLESHOOTING 

    HINT: 

    • If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.

      In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item "Status of Battery Charge Control" changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)

    • If the GTS is not available and the Data List item "Status of Battery Charge Control" cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

      If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

    • After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.
    • Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.
    • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure (except for Mexico Models).

      Refer to DTC CHECK / CLEAR [12/2023 - ]

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories (except for Mexico Models).
    1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

      Powertrain > Stop and Start > Clear DTCs 

    2. Turn the ignition switch off and wait for at least 30 seconds.
    3. Turn the ignition switch to ON.
    4. Wait 15 seconds or more.
    5. Enter the following menus: Powertrain / Stop and Start / Trouble Codes.

      Powertrain > Stop and Start > Trouble Codes 

    6. Read the pending DTCs.

      HINT: 

      • If a pending DTC is output, the system is malfunctioning.
      • If a pending DTC is not output, perform the following procedure.
  2. STOP AND START SYSTEM OPERATION CHECK 

    Refer to OPERATION CHECK [12/2023 - ]

scientia non olet · About LEMON Manuals