4-8 FI SYSTEM DIAGNOSIS SHORT CIRCUIT CHECK (WIRE HARNESS TO GROUND) • Disconnect the negative cable from the battery. • Disconnect the connectors/couplers at both ends of the circuit *1 to be checked. NOTE: If the circuit to be checked branches to other parts as shown, disconnect all connectors/couplers of those parts. Otherwise, diagnosis will be misled. • Measure resistance between terminal at one end of circuit (A terminal in figure) and body ground. If continuity is indicated, there is a short circuit to ground between terminals A and C. 5 V 1 Other parts *1 To other parts • Disconnect the connector/coupler included in circuit (coupler E B) and measure resistance between terminal A and body L *1 ground. If continuity is indicated, the circuit is shorted to the ground between terminals A and B. P M 1 ECM A S *1 To other parts