Check For Intermittent Problems [08/2019 - ]
WARNING: This page is about a different car, the 2021 Toyota Tundra and 2020 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
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.
- If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before operation history has been read and saved, the operation history information could be lost.
- The function "Read operation history" uses the current system time setting inside the Techstream and the time counter inside the controlling ECU to calculate the timings shown in the operation history. For this reason, before reading out the operation history, first make sure that the Techstream system clock is accurately set to the current time.
- The time counter in the control ECU may deviate by up to +/- 10% due to the characteristics of the time counter.
- The time counter in the control ECU is reset approximately 34 days before the "Current" value due to the characteristics of the time counter. Therefore, the time information stored before the 34th day may not be accurately displayed.
- 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 operation log of ID code registration, Radio wave interference or Radio wave interference 2.
- Following the instructions on the screen, save the operation history.
Operation History List Auto Entry Mode Switch History Auto Entry Wireless Operation History Warning Operation History Engine Start System Start Operation Customize (Auto Entry Cancel) Customize (Door Unlock Mode Switch) Radio wave interference (RF Signal Received) Engine Start (inactive) System Start Operation (inactive) Remote Engine Starter (inactive) Auto Entry Unlock (inactive) Registration Function (Reason for Non-operation) Auto Entry Lock (inactive) Engine Start Inactive (Brake/Clutch System) Radio Wave Interference (RF Reception Not Available) Engine Start Inactive (Steering Lock System) HINT:
Some items are not displayed depending on the vehicle.
- SYMPTOM SIMULATION