THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): U0100,U0140,U0142,U0155,U0230,U1103,U1117; Lost Communication with ECM / PCM; 2019 - 2024 MY RAV4 [11/2018

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), shift lock control unit assembly, combination meter assembly, multiplex network door ECU*1 or engine stop and start ECU*2.

Data from the option connector (bus buffer ECU) cannot be received.

*1: w/ Power Back Door System
*2: w/ Stop and Start System

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:

Turn the engine switch on (IG) and wait at least 10 seconds.

U0140

Lost Communication with Body Control Module

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:

Any time

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:

Any time

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:

Turn the engine switch on (IG) and wait at least 10 seconds.

U0230

Lost Communication with Rear Gate Module

CAN communication malfunction between certification ECU (smart key ECU assembly) and multiplex network door ECU (1 trip detection logic*)

Multiplex network door ECU

DTC Output Confirmation Operation:

Turn the engine switch on (IG) and wait at least 3 seconds.

U1103

Lost Communication with Stop and Start Control Module

CAN communication malfunction between the certification ECU (smart key ECU assembly) and engine stop and start ECU (1-trip detection logic*).

Engine stop and start ECU

DTC Output Confirmation Operation:

Turn the engine switch on (IG) and wait 10 seconds or more.

U1117

Lost Communication with Accessory Gateway

Data from the option connector (bus buffer ECU) cannot be received

Connector and branch wire of sub bus 2 of option connector (bus buffer ECU)
Internal malfunction of option connector (bus buffer ECU)

DTC Output Confirmation Operation:

Turn the engine switch on (IG) and wait at least 10 seconds.

*: 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 is determined that the malfunction is not in the direct line (NE) but in CAN communication.

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.

If the following conditions are met, it is determined that there is a malfunction in both CAN communication and the direct line (NE).

When the engine switch is pressed, the engine stops cranking after 6 seconds.
When the engine switch is pressed and held, the engine remains cranking for up to 30 seconds.

U0140

The warning (meter buzzer) does not sound and no warning messages displayed on the multi-information display.

U0142

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

U0155

The warning (meter buzzer) does not sound and the meter does not indicate a warning.
There is no effect on vehicle behavior.

U0230

Power back door does not operate.

U1103

The engine stall misjudgment is done by the idling stop by stop and start system.
Immobiliser set is done by the door operation in the idling stop by stop and start system

U1117

The engine cannot be started using the wireless remote control function.

Related Data List and Active Test Items

DTC No.

Data List and Active Test

U0100

U0140

U0142

U0155

U0230

U1103

U1117

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".

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

GO TO CAN COMMUNICATION SYSTEM

(a) Refer to the CAN Communication System.

Click here

2019 - 2024 MY RAV4 [11/2018 - ]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

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