Toyota Yaris: Smart Key System (for Start Function) / New Key Registration Warning Message is not Displayed

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System (for Start Function) / New Key Registration Warning Message is not Displayed

DESCRIPTION

If the new key registration warning message is not displayed after an electrical key transmitter sub-assembly has been registered, there may be communication problem between the certification ECU (smart key ECU assembly) and combination meter assembly (meter ECU).

CAUTION / NOTICE / HINT

NOTICE:

When using the GTS with the ignition switch off, connect the GTS to the DLC3 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 vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. 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 smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
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Before replacing the certification ECU (smart key ECU assembly), refer to Registration.
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After repair, confirm that no DTCs are output.
Check that there are no electrical key transmitter sub-assemblies in the vehicle.
When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

1.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Smart Key > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

GO TO DIAGNOSTIC TROUBLE CODE CHART

2.	READ VALUE USING GTS (FL DOOR COURTESY SWITCH STATUS)

(a) Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Door Courtesy Switch Status	Front door RH courtesy light switch signal	OFF or ON	OFF: Front door RH closed ON: Front door RH open	for RHD
FL Door Courtesy Switch Status	Front door LH courtesy light switch signal	OFF or ON	OFF: Front door LH closed ON: Front door LH open	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

FR Door Courtesy Switch Status

Front door RH courtesy light switch signal

OFF or ON

OFF: Front door RH closed

ON: Front door RH open

for RHD

FL Door Courtesy Switch Status

Front door LH courtesy light switch signal

OFF or ON

OFF: Front door LH closed

ON: Front door LH open

Body Electrical > Main Body > Data List

Tester Display
FR Door Courtesy Switch Status
FL Door Courtesy Switch Status

Result	Proceed to
On the GTS screen, ON or OFF is displayed accordingly.	A
On the GTS screen, ON or OFF is not displayed accordingly.	B

GO TO LIGHTING SYSTEM

3.	CHECK METER / GAUGE SYSTEM

(a) With the electrical key transmitter sub-assembly in the vehicle and all of the doors closed, lock the doors using the entry lock function and check that the warning message is displayed on the multi-information display.

NOTICE:

In order to prevent the electrical key transmitter sub-assembly from being locked inside the vehicle, perform this inspection with the window of a door open.

HINT:

Key lock-in prevention function (vehicle interior).

Click here

Result	Proceed to
The warning message is displayed on the multi-information display.	A
The warning message is not displayed on the multi-information display.	B

REPLACE COMBINATION METER ASSEMBLY

4.	ADDITIONAL KEY REGISTRATION

(a) Clear all of the registered electrical key transmitter sub-assemblies except one and perform registration again.

5.	CHECK MULTI-INFORMATION DISPLAY

(a) With all of the doors closed, lock the doors using the entry lock function.

(b) Unlock the doors using the entry unlock function, open the driver door and check that the warning message is displayed on the multi-information display.

Result	Proceed to
The warning message is displayed on the multi-information display.	A
The warning message is not displayed on the multi-information display.	B

END (10 DAYS MAY HAVE ELAPSED SINCE AN ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS REGISTERED)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART SFI System DTC No. Detection Item MIL Note Link P001013 A Camshaft Position Actuator Bank 1 Circuit Open Comes on SAE: P0010 P001100 Camshaft Position "A" - Timing Over-Advanced or System Performance Bank 1 Comes on SAE: P0011 P001200 Camshaft Position "A" - Timing Over-Retarded Bank 1 Comes on SAE: P0012 P001313 Camshaft Position "B" - Actuator Bank 1 Circuit Open Comes on SAE: P0013 P001400 Camshaft Position "B" - Timing Over-Advanced or System Performance Bank 1 Comes on SAE: P0014 P001500 Camshaft Position "B" - Timing Over-Retarded Bank 1 Comes on SAE: P0015 P001600 Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor A Comes on SAE: P0016 P001700 Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor B Comes on SAE: P0017 P003012 HO2S Heater Control Bank 1 Sensor 1 Circuit Short to Battery Comes on SAE: P0032 P003013 HO2S Heater Control Bank 1 Sensor 1 Circuit Open Comes on SAE: P0031 P003312 Turbocharger / Supercharger Bypass Valve "A" Control Circuit Short to Battery - SAE: P0035 P003314 Turbocharger / Supercharger Bypass Valve "A" Control Circuit Short to Ground or Open - SAE: P0034 P003612 HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Battery Comes on SAE: P0038 P003613 A/F (O2) Heater Control Circuit Bank 1 Sensor 2 Circuit Open Comes on SAE: P0037 P006D62 Barometric Pressure - Turbocharger/Supercharger Inlet Pressure Correlation Bank 1 Signal Compare Failure - SAE: P006D P007A11 Charge Air Cooler Temperature Sensor Bank 1 Circuit Short to Ground - SAE: P007C P007A15 Charge Air Cooler Temperature Sensor Bank 1 Circuit Short to Battery or Open - SAE: P007D P008700 Fuel Rail / System Pressure - Too Low Comes on SAE: P0087 P008800 Fuel Rail / System Pressure - Too High Comes on SAE: P0088 P008A00 Low Pressure Fuel System Pressure - Too Low - SAE: P008A P008B00 Low Pressure Fuel System Pressure - Too High - SAE: P008B P00CF62 Barometric Pressure - Turbocharger / Supercharger Boost Sensor "A" Signal Compare Failure Comes on SAE: P00CF P010012 Mass or Volume Air Flow Sensor "A" Circuit Short to Battery Comes on SAE: P0103 P010014 Mass or Volume Air Flow Sensor "A" Circuit Short to Ground or Open Comes on SAE: P0102 P010511 Manifold Absolute Pressure / Barometric Pressure Sensor Circuit Short to Ground Comes on SAE: P0107 P010515 Manifold Absolute Pressure / Barometric Pressure Sensor Circuit Short to Battery or Open Comes on SAE: P0108 P011011 Intake Air Temperature Sensor 1 Bank 1 Circuit Short to Ground Comes on SAE: P0112 P011015 Intake Air Temperature Sensor 1 Bank 1 Circuit Short to Battery or Open Comes on SAE: P0113 P011511 Engine Coolant Temperature Sensor 1 Circuit Short to Ground Comes on SAE: P0117 P011515 Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open Comes on SAE: P0118 P01152A Engine Coolant Temperature Sensor 1 Signal Stuck in Range Comes on SAE: P0116 P012011 Throttle / Pedal Position Sensor / Switch "A" Circuit Short to Ground Comes on SAE: P0122 P012015 Throttle / Pedal Position Sensor / Switch "A" Circuit Short to Battery or Open Comes on SAE: P0123 P01201C Throttle / Pedal Position Sensor / Switch "A" Circuit Voltage Out of Range Comes on SAE: P0121 P012A11 Turbocharger/Supercharger Inlet Pressure Sensor "A" Circuit Low Circuit Short to Ground - SAE: P012C P012A15 Turbocharger/Supercharger Inlet Pressure Sensor "A" Circuit High Circuit Short to Battery or Open - SAE: P012D P013616 A/F (O2) Sensor Circuit Bank 1 Sensor 2 Circuit Current (Voltage) Below Threshold Comes on SAE: P0136 P017100 System Too Lean Bank 1 Comes on SAE: P0171 P017200 System Too Rich Bank 1 Comes on SAE: P0172 P019011 Fuel Rail Pressure Sensor "A" Circuit Short to Ground Comes on SAE: P0192 P019015 Fuel Rail Pressure Sensor "A" Circuit Short to Battery or Open Comes on SAE: P0193 P019511 Engine Oil Temperature Sensor Circuit Short to Ground - SAE: P0197 P019515 Engine Oil Temperature Sensor Circuit Short to Battery or Open - SAE: P0198 P020113 Cylinder 1 Injector "A" Circuit Open Comes on SAE: P0201 P020213 Cylinder 2 Injector "A" Circuit Open Comes on SAE: P0202 P020313 Cylinder 3 Injector "A" Circuit Open Comes on SAE: P0203 P022011 Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Ground Comes on SAE: P0222 P022015 Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Battery or Open Comes on SAE: P0223 P023400 Turbocharger/Supercharger "A" Overboost Condition - SAE: P0234 P023511 Turbocharger/Supercharger Boost Sensor "A" Circuit Short to Ground Comes on SAE: P0237 P023515 Turbocharger/Supercharger Boost Sensor "A" Circuit Short to Battery or Open Comes on SAE: P0238 P02351C Turbocharger/Supercharger Boost Sensor "A" Circuit Voltage Out of Range - SAE: P0236 P024313 Turbocharger/Supercharger Wastegate Solenoid "A" Circuit Open Does not come on SAE: P0243 P030000 Random/Multiple Cylinder Misfire Detected Comes on/Blinks* *: The MIL flashes when a catalyst-damaging misfire is detected...