FI SYSTEM DIAGNOSIS 4-47 Step 3 1) Connect the TP sensor coupler 1 to the test harness. V 2) Turn the ignition switch ON. 3) Measure the TP sensor output voltage at the coupler (between + P/B and - B/Br) by turning the throttle grip. TP sensor output voltage 3 Throttle valve is closed: Approx. 1.1 V Throttle valve is opened: Approx. 4.3 V 09900-25008: Multi-circuit tester set P/B Tester knob indication: Voltage () TPS R ECM B/Br Is the voltage OK? 3 E • P/B, Red or B/Br wire open or shorted to ECM coupler (Harness side) ground, or poor 8, A or S connection L (Black) (Gray) • If wire and connection are OK, intermittent trou- P YES ble or faulty ECM. • Recheck each terminal and wire harness for M open circuit and poor connection. A • Replace the ECM with a known good one, and inspect it again. S NO If check result is not satisfactory, replace TP sen- sor with a new one. 4) After repairing the trouble, clear the DTC using SDS tool. (4-27)