4-76 FI SYSTEM DIAGNOSIS 5) If OK, then check the continuity between each terminal and 1 ground. STP sensor continuity: ∞ Ω (Infinity) 09900-25008: Multi-circuit tester set Tester knob indication: Resistance (Ω) Are the resistance and continuity OK? YES Go to Step 2. NO Replace the injector with a new one. (5-23) 6) After repairing the trouble, clear the DTC using SDS tool. (4-27) Step 2 2 1) Turn the ignition switch ON. V 2) Measure the injector voltage between Y/R wire and ground. Injector voltage: Battery voltage (+ Y/R – - Ground) NOTE: Injector voltage can be detected only 3 for seconds after ignition E switch is turned ON. L 09900-25008: Multi-circuit tester set P Tester knob indication: Voltage () Is the voltage OK? M 2 • Gr/W wire open or shorted to ground, or poor h ECM coupler (Harness side) A (Black) (Gray) connection (#1 cylinder side) S • Gr/B wire open or shorted to ground, or poor g connection (#2 cylinder side) • Gr/Y wire open or shorted to ground, or poor f connection (#3 cylinder side) YES • Gr/R wire open or shorted to ground, or poor e connection (#4 cylinder side) • If wire and connection are OK, intermittent trou- ble or faulty ECM. • Recheck each terminal and wire harness for open circuit and poor connection. • Replace the ECM with a known good one, and inspect it again. NO Open circuit in the Y/R wire 3) After repairing the trouble, clear the DTC using SDS tool. (4-27)