PRECAUTIONS FOR INSPECTING ELECTRONIC SHIFT LEVER SYSTEM
The shift control ECU is a network management-compatible ECU. Therefore, the power source turns on when CAN communication is established.
When the engine switch is turned off, the shift control ECU will not shut down immediately. Therefore, when a fail-safe function is operating, if the engine switch is operated repeatedly within a short period of time, the fail-safe function will not be canceled. After turning the engine switch off, wait approximately 1 minute or more for the shift control ECU to completely shut down before connecting the GTS, opening/closing a door or operating a pedal.
Do not change the shift state between park (P) and any other shift state repeatedly within a short period of time, otherwise the shift state will not be able to be changed from park (P) for a certain period of time to protect the system. If the system protection function operates, wait approximately 30 seconds before attempting to change the shift state.
If the shift state cannot be changed from park (P), the battery voltage may be low. Also, the shift state may automatically change to park (P) if the battery voltage drops when shift state not in park (P).
If the electronic shift lever system has been damaged due to a flood, etc., the shift state will not be able to be changed to or from park (P).
When the shift state cannot be changed from park (P) to any other state, transport the vehicle by using the forced parking lock release mechanism to release the parking lock.
If the electronic shift lever system is damaged, the engine switch may be turned to on (ACC) when attempting to turn the engine switch off. In this case, applying the parking brake may turn off the engine switch.
Do not turn the engine switch off while the vehicle is being towed. The rear wheels may be secured by the parking lock according to the automatic park (P) function operating, leading to unforeseen accidents.
If a fail-safe function is operating due to a malfunction or the battery voltage becoming low, a warning message may be continuously displayed on the multi-information display until the shift state is changed from park (P) to any other state, even if the malfunction has been repaired or the battery has been charged.
The vehicle is equipped with a sub-battery. Therefore, if the battery is removed with the engine switch on (IG), power failure is determined and the shift state may automatically be changed to park (P).
Before disconnecting the cable from the negative (-) battery terminal, check that the parking brake is operating and the shift state is in park (P).
CAN COMMUNICATION SYSTEM PRECAUTIONS
The CAN communication system is used for communication between the shift control ECU, the ECM, the certification ECU (smart key ECU assembly) and other ECUs. If there are any problems in the CAN communication lines, corresponding DTCs are output.
If any CAN communication DTCs are output, repair the malfunction and troubleshoot the electronic shift lever system after communication becomes normal.
PRECAUTION FOR REPLACING SHIFT CONTROL ECU
Note
The vehicle is equipped with a sub-battery. Therefore, ensure there is no power being supplied to the vehicle when disconnecting or reconnecting the connector of the shift control ECU and when removing or installing the shift control ECU.
Turn the engine switch off.
Check that the ODO meter display has turned off.
Tech Tips
After turning the engine switch off, the ODO meter turns off after roughly 30 seconds and the sub-battery module assembly enters sleep mode. However, after the electrical system has been shut off when the battery (circuit) power failure is determined, approximately 12 V may be maintained between the positive (+) terminal and negative (-) terminal of the sub-battery module assembly for up to approximately 10 minutes.
Check that the voltage between the terminals of the sub-battery module assembly is 0 V.
Disconnecting the cable from the negative (-) battery terminal.