Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Operation History List

OPERATION HISTORY LIST

NOTICE:

  • 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.

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Smart Key / Utility / Operation History.

(e) 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 suspended after one or more ID code had successfully been registered due to a malfunction of the immobiliser 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 code 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 code 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 code 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 code 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 code 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 are be 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 a 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. (See page If the certification ECU (smart key ECU assembly) has been replaced ).
  • 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).

Vehicle Speed Too High

Electrical key transmitter sub-assembly registration was not possible because the vehicle speed was 5 km/h 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 immobiliser amplifier, such as a short to ground. DTC B278A was stored.

Immobiliser 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. In this situation, the following are suspected:

  • The registered electrical key transmitter sub-assembly was not held near the engine switch properly.
  • Malfunction of the engine switch (immobiliser amplifier), related wire harness or electrical key transmitter sub-assembly.

HINT:

The engine immobiliser 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).

No ECU Response

A recognition code is used between the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or UPR bracket 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 or UPR bracket assembly). If no malfunction was found in the ECU connectors or wire harnesses during inspection, a malfunction in either of the ECUs is suspected.

L Code Verification Error

A recognition code (L code) is used between the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or UPR bracket 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.

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 immobiliser 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 immobiliser recognition not succeeding.

The following are suspected:

  • The registered electrical key transmitter sub-assembly was not held against the engine switch properly.
  • Malfunction of the engine switch (immobiliser amplifier), a related wire harness or an electrical key transmitter sub-assembly.

HINT:

The immobiliser recognition procedure is to hold an electrical key transmitter sub-assembly near the engine switch to check whether the ID information of the electrical key transmitter sub-assembly and that of the certification ECU (smart key ECU assembly) match or not.

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 are suspected:

Registration of electrical key transmitter sub-assemblies was supposed to be done one by one. If 2 electrical key transmitter sub-assemblies were held against the engine switch at the same time, mixed up registration information would be stored in the certification ECU (smart key ECU assembly) resulting in suspension of the 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 against the engine switch, the electrical key transmitter sub-assembly registration was suspended after one or more ID code registration had been completed successfully due to a malfunction of the immobiliser 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 engine immobiliser system certification not succeeding.

The following are suspected:

  • The registered electrical key transmitter sub-assembly was not held against the engine switch properly.
  • Malfunctions of the engine switch (immobiliser amplifier), a related wire harness or an electrical key transmitter sub-assembly.

HINT:

The immobiliser recognition procedure is to hold an electrical key transmitter sub-assembly against the engine switch to check whether the ID information of the electrical key transmitter sub-assembly and that of the certification ECU (smart key ECU assembly) match or not.

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).

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 other vehicle. 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 are suspected:

Registration of electrical key transmitter sub-assemblies is supposed to be done one by one. If 2 electrical key transmitter sub-assemblies are held against the engine switch at the same time, mixed up registration information will be stored in the certification ECU (smart key ECU assembly) resulting in suspension of the registration.

HINT:

Reregister the electrical key transmitter sub-assemblies using the correct procedure.

No Response Registering L/S Code

Registration of the connecting ECU (steering lock ECU (steering lock actuator or UPR bracket 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 or UPR bracket 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 certification ECU (smart key ECU assembly) and the steering lock ECU (steering lock actuator or UPR bracket assembly).

The following are suspected:

The connectors, wire harnesses or ECUs might be malfunctioning.

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.

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 trunk operation was performed, the electrical key transmitter sub-assembly could not be confirmed due to wave interference.

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