- When the engine switch is pressed, the system controls the engine based on the engine speed signal via direct line, causing the engine to stop cranking.
- When the engine switch is pressed and held, the system controls the engine based on the engine speed signal via direct line, causing the engine to stop cranking.
| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001ARFC |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): U0100,U0140,U0142,U0155; Lost Communication with ECM / PCM; 2019 - 2022 MY Avalon [04/2018 - ] | ||
|
DTC |
U0100 |
Lost Communication with ECM / PCM |
|
DTC |
U0140 |
Lost Communication with Main Body ECU |
|
DTC |
U0142 |
Lost Communication with Main Body ECU |
|
DTC |
U0155 |
Lost Communication with Combination Meter |
DESCRIPTION
These DTCs are stored when there is a CAN communication malfunction between the certification ECU (smart key ECU assembly), ECM, main body ECU (multiplex network body ECU) or combination meter assembly, and data from the option connector (bus buffer ECU) cannot be received.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Note |
|---|---|---|---|---|
|
U0100 |
Lost Communication with ECM / PCM |
CAN communication malfunction between certification ECU (smart key ECU assembly) and ECM (1-trip detection logic*) |
ECM |
DTC Output Confirmation Operation:
|
|
U0140 |
Lost Communication with Main Body ECU |
CAN communication malfunction between certification ECU (smart key ECU assembly) and main body ECU (multiplex network body ECU) (1-trip detection logic*) |
Main body ECU (multiplex network body ECU) |
DTC Output Confirmation Operation:
|
|
U0142 |
Lost Communication with Main Body ECU |
CAN communication malfunction between certification ECU (smart key ECU assembly) and main body ECU (multiplex network body ECU) (1-trip detection logic*) |
Main body ECU (multiplex network body ECU) |
DTC Output Confirmation Operation:
|
|
U0155 |
Lost Communication with Combination Meter |
CAN communication malfunction between certification ECU (smart key ECU assembly) and combination meter assembly (1-trip detection logic*) |
Combination meter assembly |
DTC Output Confirmation Operation:
|
- *: Only detected while a malfunction is present.
Vehicle Condition and Fail-safe Function when Malfunction Detected
|
DTC Code |
Vehicle Condition when Malfunction Detected |
Fail-safe Function when Malfunction Detected |
|---|---|---|
|
U0100 |
There is no effect on vehicle behavior. |
If the following conditions are met, it can be determined that the malfunction is not in the direct line (NE) but in the CAN communication system. If the following conditions are met, it can be determined that there is a malfunction in both the CAN communication system and the direct line (NE).
|
|
U0140 U0142 |
|
- |
|
U0155 |
The warning (meter buzzer) does not sound and no warning messages displayed on the multi-information display. |
- |
Related Data List and Active Test Items
|
DTC No. |
Data List and Active Test |
|---|---|
|
U0100 U0140 U0142 U0155 |
- |
CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
HINT:
When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Check for DTCs and note any DTCs that are output.
Click here
![2019 - 2022 MY Avalon [04/2018 - ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
| NEXT |
|
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
|