4-4 FI SYSTEM DIAGNOSIS • When connecting meter probe from the terminal side of the coupler (where connection from harness side not being possi- ble), use extra care not to force and cause the male terminal to bend or the female terminal to open. Connect the probe as shown to avoid opening of female ter- minal. Never push in the probe where male terminal is supposed to fit. • Check the male connector for bend and female connector for excessive opening. Also check the coupler for locking (loose- ness), corrosion, dust, etc. 1 Coupler 2 Probe 3 Where male terminal fits FUSE • When a fuse blows, always investigate the cause to correct it and then replace the fuse. • Do not use a fuse of a different capacity. • Do not use wire or any other substitute for the fuse. E PL M ECM/VARIOUS SENSORS A • Since each component is a high-precision part, great care INCORRECT should be taken not to apply any sharp impacts during S removal and installation. • Be careful not to touch the electrical terminals of the ECM. The static electricity from your body may damage this part.