Smart Key System (For Entry Function) (Diagnostic Codes & Symptom Tests): Overview Toyota Corolla XI

OPERATION HISTORY LIST [08/2013 - ]

Note. The cause of a malfunction is stored in the RAM or EEPROM in the certification ECU (smart key ECU assembly). As the cause of a malfunction stored in the RAM will be cleared when the cable is disconnected from the negative (-) battery terminal, do not disconnect the cable from the negative (-) battery terminal before checking and recording are complete. 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.

1. OPERATION HISTORY HINT: The certification ECU (smart key ECU assembly) stores the operation history of the smart key system and it can be read using the Techstream. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Key / Utility / Operation History / Certification ECU Log of ID Code Registration or Radio Wave Interference. Body Electrical > Smart Key > Utility Tester Display Operation History Check the freeze frame data. CERTIFICATION ECU LOG OF ID CODE REGISTRATION Parameter Name Content Transponder Key Amp Error Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, key registration was not successful after one or more ID codes had successfully been registered due to a malfunction of the immobilizer amplifier, such as a short to ground. The ECU code was registered successfully. DTC B278A was stored. Registration Failed; Vehicle ID Error Although an unregistered electrical key transmitter sub-assembly was held near the engine switch for registration, electrical key transmitter sub-assembly registration was suspended after one or more ID codes had successfully been registered because time had expired due to the vehicle ID code sent by the electrical key transmitter sub-assembly not matching the code stored by the certification ECU (smart key ECU assembly). The ECU code was registered successfully. A recognition code is used between the electrical key transmitter sub-assembly and the certification ECU (smart key ECU assembly). Although the vehicle ID stored in the certification ECU (smart key ECU assembly) should be registered to the electrical key transmitter sub-assembly when the electrical key transmitter sub-assembly was registered, it was not. "Registration Failed; Vehicle ID Error" is displayed when trying to register an electrical key transmitter sub-assembly of another vehicle. If electrical key transmitter sub-assembly registration could not be completed successfully after trying to register another electrical key transmitter sub-assembly, the certification ECU (smart key ECU assembly) might be malfunctioning. Registration Failed; Except Vehicle ID Error Although an unregistered electrical key transmitter sub-assembly was held near the engine switch for registration, electrical key transmitter sub-assembly registration was suspended after one or more ID codes had successfully been registered due to noise or the transmitter battery being low. The ECU code was registered successfully. Registration Failed; Key Already Registered As a registered electrical key transmitter sub-assembly was held near the engine switch by mistake, electrical key transmitter sub-assembly registration was suspended after one or more ID codes had successfully been registered. The ECU code was registered successfully. Registration Failed; ID Code Write Error Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration was suspended after one or more ID codes had successfully been registered due to the certification ECU (smart key ECU assembly) not being able to store the electrical key transmitter sub-assembly information correctly. The ECU code was registered successfully. Registration Failed; Key Info Abnormal Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration was suspended after one or more ID codes had successfully been registered due to the certification ECU (smart key ECU assembly) not being able to store the electrical key transmitter sub-assembly ID code correctly. The ECU code was registered successfully. The following is suspected: Registration of electrical key transmitter sub-assemblies is to be done one by one. If 2 electrical key transmitter sub-assemblies were held near the engine switch at the same time, incorrect registration information was stored in the certification ECU (smart key ECU assembly), suspending registration. HINT: Reregister the electrical key transmitter sub-assemblies using the correct procedure. Failed Registration Mode Although the mode was switched to registration mode using the Techstream, the mode was not successfully switched (another mode may have already been selected). Vehicle ID not set Although the vehicle ID should be stored in the certification ECU (smart key ECU assembly) at the factory, the ID could not be stored successfully (malfunction of the certification ECU (smart key ECU assembly)). Key Registration Max Registration was not possible because the maximum number of electrical key transmitter sub-assemblies had already been registered to the certification ECU (smart key ECU assembly). HINT: If a new electrical key transmitter sub-assembly needs to be registered, such as when one of the registered electrical key transmitter sub-assemblies has been lost, erase an unnecessary ID code first. If the certification ECU (smart key ECU assembly) has been replaced with a new one, there should be no registered electrical key transmitter sub-assemblies. If any exist, replace the new certification ECU (smart key ECU assembly) with another new certification ECU (smart key ECU assembly). ID-BOX Error It was not possible to enter registration mode because whether the vehicle was provided with an ID code box was unknown. (If the function of the ID code box is integrated with the certification ECU (smart key ECU assembly), no ID code box is provided. If it is not integrated, an ID code box is provided.) Vehicle Speed Too High Electrical key transmitter sub-assembly registration was not possible because the vehicle speed was 5 km/h (3.11 mph) or more (electrical key transmitter sub-assembly registration is possible only while the vehicle is stopped). Transponder Key Amp Abnormal Although a registered electrical key transmitter sub-assembly was held near the engine switch, the registered electrical key transmitter sub-assemblies could not be confirmed and electrical key transmitter sub-assembly registration was not possible due to a malfunction of the immobilizer amplifier, such as a short to ground. DTC B278A was stored. Immobilizer Verification Error Although a registered electrical key transmitter sub-assembly was held near the engine switch, ID number certification between the electrical key transmitter sub-assembly and the certification ECU (smart key ECU assembly) did not succeed. The followings are suspected: The registered electrical key transmitter sub-assembly was not held near the engine switch properly. Malfunction of the engine switch (immobilizer amplifier), related wire harness or electrical key transmitter sub-assembly. HINT: The immobilizer system certification procedure is to hold an electrical key transmitter sub-assembly near the engine switch to check whether the electrical key transmitter sub-assembly ID information matches that of the certification ECU (smart key ECU assembly). No ECU Response A recognition code is used between the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly). Electrical key transmitter sub-assembly registration was not possible due to the certification ECU (smart key ECU assembly) not receiving a response from the steering lock ECU (steering lock actuator assembly). If no malfunction was found in the ECU connectors or wire harnesses during inspection, a malfunction in either of the ECUs is suspected. S Code Verification Error A recognition code (S code) is used between the certification ECU (smart key ECU assembly) and ID code box (immobilizer code ECU). Registration was not possible due to these codes not matching. If no malfunction was found in all the ECU connectors or wire harnesses at inspection, a malfunction in one of the ECUs is suspected. HINT: The code of any ECU that has been registered to another vehicle in the past will not match. L Code Verification Error A recognition code (L code) is used between the ID code box (immobilizer code ECU) and steering lock ECU (steering lock actuator assembly). Registration was not possible due to these codes not matching. If no malfunction was found in all the ECU connectors or wire harnesses at inspection, a malfunction in one of the ECUs is suspected. HINT: The code of any ECU that has been registered to another vehicle in the past will not match. L Code OK S Code NG Although L code verification was successful, registration was not possible due to S code verification result being abnormal. HINT: A recognition code (S code) is used between the certification ECU (smart key ECU assembly) and ID code box (immobilizer code ECU). A recognition code (L code) is used between the ID code box (immobilizer code ECU) and steering lock ECU (steering lock actuator assembly). The code of any ECU that has been registered to another vehicle in the past will not match. Key Verification: Max Number The number of registered electrical key transmitter sub-assemblies stored in the certification ECU (smart key ECU assembly) exceeded the maximum. Key Verification: Amp Abnormal Although all of the electrical key transmitter sub-assemblies had been held near the engine switch to confirm their registration, the registered electrical key transmitter sub-assemblies could not be confirmed and electrical key transmitter sub-assembly registration was not possible due to a malfunction of the immobilizer amplifier, such as a short to ground. DTC B278A was stored. Key Verification: Read Error Although all of the electrical key transmitter sub-assemblies had been held near the engine switch to confirm their registration, electrical key transmitter sub-assembly registration was not possible due to immobilizer recognition not succeeding. The following are suspected: The registered electrical key transmitter sub-assembly was not held near the engine switch properly. Malfunction of the engine switch (immobilizer amplifier), a related wire harness or an electrical key transmitter sub-assembly. HINT: The immobilizer system certification procedure is to hold an electrical key transmitter sub-assembly near the engine switch to check whether or not the electrical key transmitter sub-assembly ID information matches that of the certification ECU (smart key ECU assembly). Unverified Key Although all of the electrical key transmitter sub-assemblies had been held near the engine switch to confirm their registration, electrical key transmitter sub-assembly registration was not possible due to some of the electrical key transmitter sub-assemblies remaining unconfirmed. The following are suspected: Some of the registered electrical key transmitter sub-assemblies were not held near the engine switch properly. Some of the registered electrical key transmitter sub-assemblies had not been held near the engine switch yet. HINT: Prepare all of the registered electrical key transmitter sub-assemblies and restart system certification. Key Info Abnormal Although all of the electrical key transmitter sub-assemblies had been held near the engine switch to confirm their registration, electrical key transmitter sub-assembly registration was not possible due to each key ID not being registered correctly in the certification ECU (smart key ECU assembly). The following is suspected: Registration of electrical key transmitter sub-assemblies is to be done one by one. If 2 electrical key transmitter sub-assemblies were held near the engine switch at the same time, incorrect registration information was stored in the certification ECU (smart key ECU assembly), suspending registration. HINT: Reregister the electrical key transmitter sub-assemblies using the correct procedure. Transponder Key Amp Error Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, the electrical key transmitter sub-assembly registration was not successful after one or more ID code registration had been completed successfully due to a malfunction of the immobilizer amplifier (short to ground). The ECU code was registered successfully. DTC B278A was stored. New Key Registration Error Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration was not possible due to immobilizer system certification not succeeding. The following are suspected: The registered electrical key transmitter sub-assembly was not held near the engine switch properly. Malfunctions of the engine switch (immobilizer amplifier), a related wire harness or an electrical key transmitter sub-assembly. HINT: The immobilizer system certification procedure is to hold an electrical key transmitter sub-assembly near the engine switch to check whether or not the electrical key transmitter sub-assembly ID information matches that of the certification ECU (smart key ECU assembly). New Key Vehicle ID Error Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration was not possible due to the vehicle ID code sent by the electrical key transmitter sub-assembly not matching the code stored by the certification ECU (smart key ECU assembly). A recognition code is used between the electrical key transmitter sub-assembly and the certification ECU (smart key ECU assembly). Although the vehicle ID stored in the certification ECU (smart key ECU assembly) should be registered to the electrical key transmitter sub-assembly on the occasion of the electrical key transmitter sub-assembly registration, it was not successful. "Registration Failed; Vehicle ID Error" was displayed when trying to register an electrical key transmitter sub-assembly of another vehicles. If the electrical key transmitter sub-assembly registration could not be completed successfully after trying to register another electrical key transmitter sub-assembly, the certification ECU (smart key ECU assembly) may be malfunctioning. New Key Registration Failed Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration was not possible due to the key ID code sent by the electrical key transmitter sub-assembly not matching the code stored by the certification ECU (smart key ECU) due to noise or the transmitter battery being low. "New Key Vehicle ID Error" was displayed due to the vehicle ID registered in the certification ECU (smart key ECU assembly) and the vehicle ID registered in the electrical key transmitter sub-assembly not matching. New Key Already Registered Electrical key transmitter sub-assembly registration was not possible due to a registered electrical key transmitter sub-assembly being held near the engine switch instead of an unregistered electrical key transmitter sub-assembly by mistake. New Key ID Code Error Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration was not possible due to the certification ECU (smart key ECU assembly) not being able to store the key information correctly. If registration cannot be completed successfully after a second attempt, the certification ECU (smart key ECU assembly) is malfunctioning. New Key Information Abnormal Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration was not possible due to the certification ECU (smart key ECU assembly) not being able to store the key information correctly. The following is suspected: Registration of electrical key transmitter sub-assemblies is to be done one by one. If 2 electrical key transmitter sub-assemblies were held near the engine switch at the same time, incorrect registration information was stored in the certification ECU (smart key ECU assembly), suspending registration. HINT: Reregister the electrical key transmitter sub-assemblies using the correct procedure. No Response Registering L/S Code Registration of a connected ECU (steering lock ECU (steering lock actuator assembly)) was not possible due to the certification ECU (smart key ECU assembly) not receiving a response from the steering lock ECU (steering lock actuator assembly). HINT: Inspect the connectors and wire harnesses. L Code Verification NG L code registration was not possible. A recognition code is used between the ID code box (immobilizer code ECU) and the steering lock ECU (steering lock actuator assembly). The following is suspected: The connectors, wire harnesses or ECUs might be malfunctioning. S Code Verification NG S code registration was not possible. A recognition code is used between the ID code box (immobilizer code ECU) and the certification ECU (smart key ECU assembly). The following is suspected: The connectors, wire harnesses or ECUs might be malfunctioning. ECU ID Verification Error Although the ID code box (immobilizer code ECU) sent an S code registration request to the certification ECU (smart key ECU assembly), ECU code registration was not possible due to the input data being incorrect. Key Number Write Error ECU code registration was not possible due to the certification ECU (smart key ECU assembly) not being able to correctly store the number of electrical key transmitter sub-assemblies. ID Code BOX Write Error ECU code registration was not possible due to the certification ECU (smart key ECU assembly) not being able to store the information of whether an ID code box is provided. B Code Verification NG B code registration was not possible. A recognition code is used between the certification ECU (smart key ECU assembly) and the main body ECU (multiplex network body ECU). The connectors, wire harnesses or ECUs might be malfunctioning. RADIO WAVE INTERFERENCE Parameter Name Content Lock / Key RF Signal Interference When entry lock operation was performed, the electrical key transmitter sub-assembly could not be confirmed due to wave interference. Unlock / Key RF Signal Interference When entry unlock operation was performed, the electrical key transmitter sub-assembly could not be confirmed due to wave interference. Operating Engine Switch / Key RF Signal Interference When the engine switch was operated, the electrical key transmitter sub-assembly could not be confirmed due to wave interference. Operating Trunk Switch / Key RF Signal Interference When entry luggage operation was performed, the electrical key transmitter sub-assembly could not be confirmed due to wave interference.

DESCRIPTION

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the front door outside handle assembly (for front passenger door) (electrical key antenna) at intervals of 0.25 seconds. For the front door outside handle assembly (for front passenger door) (electrical key antenna) to detect when the electrical key transmitter sub-assembly is brought close to the vehicle, a signal requesting a response from the electrical key transmitter sub-assembly is transmitted within approximately 1 m (3.28 ft.) of the front passenger door at intervals of 0.25 seconds. DTC B27A2 is stored by the certification ECU (smart key ECU assembly) when an open circuit is detected between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for front passenger door) (electrical key antenna) (between terminals CLG2 and ANT1, or terminals CG2B and ANT2).

1. *: Only output while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED

RELATED DATA LIST AND ACTIVE TEST ITEM

Scheme 181

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the No. 1 indoor electrical key antenna assembly (front floor). For the No. 1 indoor electrical key antenna assembly (front floor) to detect when the electrical key transmitter sub-assembly is in the cabin, the signal from the certification ECU (smart key ECU assembly) requesting a response from the electrical key transmitter sub-assembly is transmitted inside the vehicle. DTC B27A5 is stored by the certification ECU (smart key ECU assembly) when an open circuit is detected between the certification ECU (smart key ECU assembly) and No. 1 indoor electrical key antenna assembly (front floor) (between terminals CLG5 and ANTE5, or terminals CG5B and CLGB).

1. *: Only output while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED

RELATED DATA LIST AND ACTIVE TEST ITEM

Scheme 182

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the No. 2 indoor electrical key antenna assembly (rear floor). For the No. 2 indoor electrical key antenna assembly (rear floor) to detect when the electrical key transmitter sub-assembly is in the cabin, the signal from the certification ECU (smart key ECU assembly) requesting a response from the electrical key transmitter sub-assembly is transmitted inside the vehicle. DTC B27A6 is stored by the certification ECU (smart key ECU assembly) when an open circuit is detected between the certification ECU (smart key ECU assembly) and No. 2 indoor electrical key antenna assembly (rear floor) (between terminals CLG6 and ANTE6, or terminals CG6B and CLGB).

1. *: Only output while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED

RELATED DATA LIST AND ACTIVE TEST ITEM

Scheme 183

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the electrical key antenna (outside luggage compartment). For the electrical key antenna (outside luggage compartment) to detect when the electrical key transmitter sub-assembly is brought close to the vehicle, the received request signal is transmitted within approximately 1.0 m (3.28 ft.) of the luggage compartment door. DTC B27A8 is stored by the certification ECU (smart key ECU assembly) when an open circuit is detected between the certification ECU (smart key ECU assembly) and electrical key antenna (outside luggage compartment) (between terminals CLG8 and ANTE8, or terminals CG8B and CLGB).

VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED

1. *: Only output while a malfunction is present.

RELATED DATA LIST AND ACTIVE TEST ITEM

Scheme 184

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the front door outside handle assembly (for driver door) (electrical key antenna) at intervals of 0.25 seconds. For the front door outside handle assembly (for driver door) (electrical key antenna) to detect when the electrical key transmitter sub-assembly is brought close to the vehicle, a signal requesting a response from the electrical key transmitter sub-assembly is transmitted within approximately 1 m (3.28 ft.) of the driver door at intervals of 0.25 seconds. DTC B27A1 is stored by the certification ECU (smart key ECU assembly) when an open circuit is detected between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door) (electrical key antenna) (between terminals CLG1 and ANT1, or terminals CG1B and ANT2).

1. *: Only output while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED

RELATED DATA LIST AND ACTIVE TEST ITEM

Scheme 185

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the No. 3 indoor electrical key antenna assembly (inside luggage compartment). For the No. 3 indoor electrical key antenna assembly (inside luggage compartment) to detect when the electrical key transmitter sub-assembly is inside the luggage area, the signal from the certification ECU (smart key ECU assembly) requesting a response from the electrical key transmitter sub-assembly is transmitted inside the luggage compartment. DTC B27A7 is stored by the certification ECU (smart key ECU assembly) when an open circuit is detected between the certification ECU (smart key ECU assembly) and No. 3 indoor electrical key antenna assembly (inside luggage compartment) (between terminals CLG7 and ANTE7, or terminals CG7B and CLGB).

1. *: Only output while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED

RELATED DATA LIST AND ACTIVE TEST ITEM

Scheme 186

When the entry operation and wireless operation of the door lock functions do not operate, a malfunction or wave interference may be occurring in either of the following: 1) the signal communication line between the door control receiver and certification ECU (smart key ECU assembly) (the line used for entry and wireless operations); or 2) the electrical key transmitter sub-assembly. If the entry lock and wireless lock operations cannot be performed, there may be electrical key transmitter sub-assembly malfunctions, wave interference or problems in the communication which is used for the entry and wireless function between the door control receiver and certification ECU (smart key ECU assembly).

Scheme 187

When the wireless operation can be used to lock and unlock the doors, communication between the door control receiver and certification ECU (smart key ECU assembly) is normal. If the entry lock and unlock functions do not operate, the entry cancel function may be set through the customize function, there may be communication problems between the electrical key transmitter sub-assembly and vehicle, or there may be wave interference.

If the entry unlock function does not operate for the driver door only, but the entry lock function operates, the request code is being transmitted properly from the driver door. In this case, there may be a problem related to the touch sensor (connection between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door) (unlock sensor)).

If the entry unlock function does not operate for the front passenger door only, but the entry lock function operates, the request code is being transmitted properly from the front passenger door. In this case, there may be a problem related to the touch sensor (connection between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for front passenger door) (unlock sensor)).

If the entry lock and unlock functions do not operate for the driver door only, the request code may not be being transmitted from the driver door or the front door outside handle assembly (for driver door) (touch sensor) may be malfunctioning. If the entry functions for other doors operate properly, communication between the electrical key transmitter sub-assembly and door control receiver is normal. In this case, there may be a problem with request code transmission (communication between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door) (electrical key antenna)), or there may be wave interference.

If the entry lock and unlock functions do not operate for the front passenger door only, the request code may not be being transmitted from the front passenger door or the front door outside handle assembly (for front passenger door) (touch sensor) may be malfunctioning. If the entry functions for other doors operate properly, communication between the electrical key transmitter sub-assembly and door control receiver is normal. In this case, there may be a problem with request code transmission (communication between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for front passenger door) (electrical key antenna)), or there may be wave interference.

If the entry lock function does not operate for the driver door only, but the entry unlock function operates, the request code is being transmitted properly from the driver door. In this case, there may be a problem related to the front door outside handle assembly (for driver door) (lock sensor) (connection between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door) (lock sensor)).

If the entry lock function does not operate for the front passenger door only, but the entry unlock function operates, the request code is being transmitted properly from the front passenger door. In this case, there may be a problem related to the front door outside handle assembly (for front passenger door) (lock sensor) (connection between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for front passenger door) (lock sensor)).

If code verification cannot be performed in the vehicle interior, there may be problems with the communication between the vehicle (indoor electrical key antenna assembly (front floor) or (rear floor)) and electrical key transmitter sub-assembly, or the certification ECU (smart key ECU assembly) may be malfunctioning. When the electrical key transmitter sub-assembly is brought into the vehicle, verification of the key ID code transmitted from the electrical key transmitter sub-assembly and the key ID code stored in the certification ECU (smart key ECU assembly) is performed. If verification cannot be performed or the codes do not match, the engine switch cannot be turned on (IG) and the engine cannot be started.

When a door is unlocked and the electrical key transmitter sub-assembly is brought into the vehicle, the certification ECU (smart key ECU assembly) activates the indoor electrical key antenna assembly which transmits radio waves to detect the electrical key transmitter sub-assembly. If the electrical key transmitter sub-assembly recognizes that it is in the detection area, it responds with the key ID code. This information is received by the indoor electrical key antenna and then sent to the certification ECU (smart key ECU assembly).

Scheme 188

If the entry luggage compartment door open function does not operate, there may be a malfunction in the luggage electrical key switch circuit or certification ECU (smart key ECU assembly), which receives a signal from the luggage electrical key switch circuit, or a communication error between the vehicle (electrical key antenna (outside luggage compartment)) and electrical key transmitter sub-assembly.

Scheme 189

If the key lock-in prevention function does not operate, there may be a problem with communication between the No. 3 indoor electrical key antenna assembly (inside luggage compartment) and electrical key transmitter sub-assembly, wave interference or a malfunction in the certification ECU (smart key ECU assembly).

Scheme 190

The smart key system (for Entry Function) uses the buzzer in the combination meter assembly (meter ECU) to perform various vehicle interior warnings. When the conditions of each warning are met, the certification ECU (smart key ECU assembly) sends a buzzer activation request signal to the combination meter assembly via CAN communication and the buzzer sounds.

If an electrical key transmitter sub-assembly could not be newly registered, wave interference or a malfunction of the certification ECU (smart key ECU assembly), electrical key transmitter sub-assembly, ID code box (immobilizer code ECU), steering lock ECU (steering lock actuator assembly) or door control receiver is suspected.

The registration to add another electrical key transmitter sub-assembly (without replacing any parts) is called "additional key ID registration".

If additional registration is not possible, refer to "Additional Key cannot be Registered".

Refer to Additional Key cannot be Registered [08/2013 - ]

HINT

If any of the following have been performed, registration of all electrical key transmitter sub-assemblies is necessary

1. The certification ECU (smart key ECU assembly) has been replaced.
2. The certification ECU (smart key ECU assembly), ID code box (immobilizer code ECU) and steering lock ECU (steering lock actuator assembly) have been replaced.

Scheme 191

If additional registration is not possible, a malfunction in the electrical key transmitter sub-assembly, certification ECU (smart key ECU assembly), engine switch, No. 2 indoor electrical key antenna assembly (front floor), steering lock ECU (steering lock actuator assembly) or door control receiver is suspected.

See also:
• REPLACEMENT [08/2013 - ]
• REMOVAL [08/2013 - ]
• REMOVAL [08/2013 - ]