FI SYSTEM DIAGNOSIS 4-3 PRECAUTIONS IN SERVICING When handling the component parts or servicing the FI system, observe the following points for the safety of the system. ELECTRICAL PARTS CONNECTOR/COUPLER • When connecting a connector, be sure to push it in until a click is felt. Click • With a lock type coupler, be sure to release the lock when dis- connecting, and push in fully to engage the lock when con- Click necting. • When disconnecting the coupler, be sure to hold the coupler body and do not pull the lead wires. • Inspect each terminal on the connector/coupler for looseness or bending. E • Inspect each terminal for corrosion and contamination. L The terminals must be clean and free of any foreign material which could impede proper terminal contact. P • Inspect each lead wire circuit for poor connection by shaking it M by hand lightly. If any abnormal condition is found, repair or replace. SA • When taking measurements at electrical connectors using a tester probe, be sure to insert the probe from the wire harness side (backside) of the connector/coupler. 1 Coupler 2 Probe