PUSH-BUTTON START, Diagnostic DTC:U0140, U0142, U0155, U0293

DTC Code DTC Name
U0140 Lost Communication with Main Body ECU
U0142 Lost Communication with Main Body ECU
U0155 Lost Communication with Combination Meter
U0293 Lost Communication with HV ECU

DESCRIPTION

These DTCs are stored when there is a CAN communication error between the certification ECU (smart key ECU assembly) and the main body ECU (multiplex network body ECU), combination meter assembly or hybrid vehicle control ECU.

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC Code DTC Detection Condition Trouble Area DTC Output Confirmation Operation
U0140 CAN communication error between the certification ECU (smart key ECU assembly) and main body ECU (1-trip detection*) Main body ECU Always
U0142 CAN communication error between the certification ECU (smart key ECU assembly) and main body ECU (1-trip detection*) Main body ECU Always
U0155 CAN communication error between the certification ECU (smart key ECU assembly) and combination meter assembly (1-trip detection*) Combination meter assembly Turn the power switch on (IG) and wait 10 seconds or more.
U0293 CAN communication error between the certification ECU (smart key ECU assembly) and hybrid vehicle control ECU (1-trip detection*) Hybrid vehicle control ECU Turn the power switch on (IG) and wait 10 seconds or more.

Vehicle Condition and Fail-safe Function when Malfunction Detected
DTC Code Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
U0140 The warning (meter buzzer) does not sound and the meter does not indicate a warning. -
U0142

  • Doors cannot be locked or unlocked. The warning (wireless buzzer) does not sound.

  • The warning (meter buzzer) does not sound and the meter does not indicate a warning.

 -
U0155

  • The warning (meter buzzer) does not sound and the meter does not indicate a warning. (When the smart key ECU stores the DTC.)

  • There is no effect on vehicle behavior. (When the certification ECU (smart key ECU assembly) stores the DTC.)

 -
U0293 The warning (meter buzzer) does not sound and the meter does not indicate a warning. -
Related Data List and Active Test Items
DTC Data List Item Active Test Item

U0140

U0142

U0155

U0293

 - -

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the vehicle power switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry & Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The push-button start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.

  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

PROCEDURE


  1. CHECK FOR DTC


    1. Note any DTCs that are output Click here.*1

      Result
      Result Proceed to
      NEXT (w/ Toyota Safety Sense) A
      NEXT (w/o Toyota Safety Sense) B

    A

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here