Computers and Control Systems: Service Precautions

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

PRECAUTION

1. INITIALIZATION
NOTICE:
- Perform the RESET MEMORY (AT initialization) when replacing the automatic transmission assembly, engine assembly or ECM Programming and Relearning.
- Perform the REGISTRATION (VIN registration) when replacing the ECM Programming and Relearning.
HINT: Initialization cannot be completed by only removing the battery.

2. FOR USING TECHSTREAM
CAUTION: Observe the following items for safety reasons:

- Read its instruction books before using the Techstream.
- Prevent the tester cable from being caught on the pedals, shift lever and 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 electronic work, disconnect the cable from the negative (-) battery terminal in order to prevent it from shorting and burning out.
(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 erased. Therefore, before disconnecting the battery cable, make a note of the settings.
NOTICE:
- When the cable is disconnected from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected.
- After the ignition switch is turned OFF, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch OFF, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.