PRECAUTIONS — Engine Fuel & Emission Control System

BATTERY - Always use a 12 volt battery as power source. - Do not attempt to disconnect battery cables while engine is running. ECM - Do not disassemble ECM. - If a battery terminal is disconnected, the memory will return to the ECM value. The ECM will now start to self-control at its initial value. Engine operation can vary slightly when the terminal is disconnected. However, this is not an indication of a problem. Do not replace parts because of a slight variation. WIRELESS EQUIPMENT - When installing C.B. ham radio or a mobile phone, be sure to observe the following as it may adversely affect electronic control systems depending on installation location. 1) Keep the antenna as far as possible from the electronic control units. 2) Keep the antenna feeder line more than 20 cm (8 in) away from the harness of electronic controls. Do not let them run parallel for a long distance. 3) Adjust the antenna and feeder line so that the standing-wave ratio can be kept smaller. 4) Be sure to ground the radio to vehicle body. ENGINE CONTROL PARTS HANDLING - Handle mass air flow sensor carefully to avoid damage. - Do not disassemble mass air flow sensor. - Do not clean mass air flow sensor with any type of detergent. - Do not disassemble IAC valve-AAC valve. - Even a slight leak in the air intake system can cause serious problems. - Do not shock or jar the camshaft position sensor and crankshaft position sensor. WHEN STARTING - Do not depress accelerator pedal when starting. - Immediately after starting, do not rev up engine unnecessarily. - Do not rev up engine just prior to shutdown. FUEL PUMP - Do not operate fuel pump when there is no fuel in lines. - Tighten fuel hose clamps to the specified torque. ECM HARNESS HANDLING - Securely connect ECM harness connectors. A poor connection can cause an extremely high (surge) voltage to develop in coil and condenser, thus resulting in damage to ICs. - Keep ECM harness at least 10 cm (4 in) away from adjacent harness, to prevent an ECM system malfunctions due to receiving external noise, degraded operation of ICs, etc. - Keep ECM parts and harness dry. - Before removing parts, turn off ignition switch and then disconnect battery ground cable.