EG–189 ENGINE – SFI SYSTEM (2JZ–GE) PRECAUTION 1. Before working on the fuel system, disconnect the negative (–) terminal cable from the battery. HINT: Any diagnostic trouble code retained by the computer will be erased when the negative (–) terminal cable is disconnected. Therefore, if necessary, read the diagnosis before disconnecting the negative (–) terminal cable from the battery. 2. Do not smoke or work near an open flame when working on the fuel system. 3. Keep gasoline away from rubber or leather parts. MAINTENANCE PRECAUTIONS 1. PRECAUTION WHEN CONNECTING GAUGE (a) Use battery as the power source for the timing light, tachometer, etc. (b) Connect the tester probe of a tachometer to the terminal IG⊖ of the DLC1. IG⊖ Tachometer DLC1 Battery P11291 2. IN EVENT OF ENGINE MISFIRE, FOLLOWING PRECAUTIONS SHOULD BE TAKEN (a) Check proper connection of battery terminals, etc. (b) Handle high–tension cords carefully. (c) After repair work, check that the ignition coil terminals and all other ignition system lines are reconnected securely. (d) When cleaning the engine compartment, be especially careful to protect the electrical system from water. CORRECT WRONG P10646 3. PRECAUTIONS WHEN HANDLING OXYGEN SENSOR (a) Do not allow oxygen sensor to drop or hit against an object. (b) Do not allow the sensor to come into contact with water.