DTC U0100: Lost Communication with ECM; DTC U0140: Lost Communication with Main Body ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; DTC U0293: Lost Communication with HV ECU [08/2013 - ]: Description
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
These DTCs are stored when there is a CAN communication error between the power management control ECU and the certification ECU (smart key ECU assembly).
HINT:
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 |
|---|---|---|---|
| U0100 | CAN communication error between the certification ECU (smart key ECU assembly) and power management control ECU (1-trip detection*) | Power management control ECU | Turn the power switch on (IG) and wait 10 seconds or more. |
| U0140 | CAN communication error between the power management control ECU and main body ECU (1-trip detection*) | Main body ECU (multiplex network 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 (multiplex network body ECU) | Always |
| U0155 | CAN communication error between the power management control ECU or 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 power management control ECU (1-trip detection*) | Power management control ECU | Turn the power switch on (IG) and wait 10 seconds or more. |
- *: Only detected while a malfunction is present and the power switch is on (IG).
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. | - |
| U0140 | The warning (meter buzzer) does not sound and the meter does not indicate a warning. | - |
| U0142 |
|
- |
| U0155 |
|
- |
| U0293 | The warning (meter buzzer) does not sound and the meter does not indicate a warning. | - |