Computers and Control Systems: Service Precautions

2GR-FXE ENGINE CONTROL SYSTEM: SFI SYSTEM: PRECAUTION

1. IGNITION SWITCH EXPRESSION

HINT
The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section.





2. PRECAUTIONS FOR INSPECTING HYBRID CONTROL SYSTEM

(a) Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are working on the high-voltage system.

NOTICE:
Do not put the vehicle into the ignition switch to ON (READY) state with the service plug grip removed as this may cause a malfunction.

(b) After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.





HINT
At least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

3. PRECAUTIONS FOR HYBRID CONTROL SYSTEM ACTIVATION

(a) When the warning light is illuminated or the auxiliary battery has been disconnected and reconnected, attempting to put the vehicle into the ignition switch to ON (READY) state the first time may not start the system. If so, turn the ignition switch off and reattempt to put the vehicle into the ignition switch to ON (READY) state.

4. FOR USING TECHSTREAM

CAUTION:
Observe the following items for safety reasons:

* Before using the Techstream, read the instruction manual.

* Prevent the Techstream cable from being caught on the pedals, shift lever or steering wheel when driving with the Techstream connected to the vehicle.

* When driving the vehicle for testing purposes using the Techstream, 2 persons are required. One is for driving the vehicle, and the other operates the Techstream.

5. DISCONNECTING AND RECONNECTING NEGATIVE BATTERY CABLE





(a) Before performing work on electronic components, disconnect the cable from the negative (-) battery terminal to prevent damage to the electrical system or electrical components.

Text in Illustration





(b) Before disconnecting and reconnecting the battery cable, turn the ignition switch off and the headlight switch off. Then loosen the terminal nut completely. Do not damage the cable or terminal.

(c) When the battery cable is disconnected, the clock and radio settings and stored DTCs are cleared. Therefore, before disconnecting the battery cable, make a note of them.

NOTICE:
* When the cable is disconnected from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected Repair Instruction - Initialization.