Be careful not to get water on any fuel injection system component. Pay close attention to the relay box and throttle valve switch connector. The connector is not water proofed and will be damaged by water.
When charging the battery be sure to remove it from the vehicle first. Never disconnect the battery cable from the battery when the engine is running. The generation of surge voltage may damage the control unit harness connector, disconnect all the control unit harnesses first, then set the starter switch to the ON position.
When replacing parts or checking the system, make sure to set the starter switch to the OFF position. When measuring voltage at the control unit harness connector, disconnect all the control unit harnesses first, then set the starter switch to the ON position.
The wiring connectors for the fuel injector, throttle valve switch, air regulator and water temperature sensor are provided with locked wires. To unlock the connector, pull and shake it gently.
System cables must be placed at least four inches away from the tension cables. Be careful not to apply and shock to the system components such as the air flow sensor, crank angle sensor and control unit. Component parts of the fuel injection system are precisely set. Even a slight distortion or dent will seriously affect performance.
The fuel pump must not be operated without fuel. Since fuel lubricates the pump, noise or other serious problems such as parts seizure will result. It is also prohibited to use any fuel other than gasoline.
G180Z, G200Z, 4ZC1-T and 1985 4XC1-U Diagnostic Charts 1 and 194