Computers and Control Systems: Service Precautions

1GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: PRECAUTION

1. INITIALIZATION

NOTICE:
* Perform Reset Memory (AT initialization) when replacing the automatic transmission assembly, engine assembly or ECM Programming and Relearning.
* Perform Registration (VIN registration) when replacing the ECM Programming and Relearning.

HINT
Initialization cannot be completed only by disconnecting and reconnecting the battery cable.

2. WHEN USING TECHSTREAM

CAUTION:
Observe the following items for safety reasons:

* Read the Techstream instruction books before using the Techstream.
* Make sure that the Techstream cable is not 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, two persons are required. One person drives the vehicle and the other operates the Techstream.
3. DISCONNECT AND RECONNECT CABLE OF NEGATIVE BATTERY TERMINAL

(a) Before performing electrical work, disconnect the cable from the negative (-) battery terminal in order to prevent short circuits and burnouts.





Text in Illustration





(b) Before disconnecting and reconnecting the battery cable, turn the ignition switch off and the headlight dimmer 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 the settings.

NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.