Computers and Control Systems: Service Precautions

2AZ-FE ENGINE CONTROL: SFI SYSTEM: PRECAUTION

1. INITIALIZATION

NOTICE:
* Perform RESET MEMORY (AT initialization) when replacing the automatic transaxle assembly, engine assembly or ECM Programming and Relearning for 2WD, for 4WD).
* Perform REGISTRATION (VIN registration) when replacing the ECM Programming and Relearning.
HINT
Reset memory cannot be completed by only disconnecting the battery.

2. 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, two persons are required. One person drives the vehicle, and the other operates the Techstream.

3. DISCONNECTING AND RECONNECTING NEGATIVE BATTERY CABLE





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

(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 the settings.