4-64 FI SYSTEM DIAGNOSIS Step 2 2 1) Connect the TO sensor coupler and ECM coupler. V 2) Insert the needle pointed probes to the lead wire coupler. 3) Turn the ignition switch ON. 4) Measure the voltage at the wire side coupler between Black and B/Br wires. TO sensor voltage (Normal): 0.4 – 1.4 V (+ Black – - B/Br) Also, measure the voltage when leaning the motorcycle. 2 5) Dismount the TO sensor from its bracket and measure the voltage when it is leaned 65° and more, left and right, from V the horizontal level. TO sensor voltage (Leaning): 3.7 – 4.4 V 65˚ (+ Black – - B/Br) 09900-25008: Multi-circuit tester set 09900-25009: Needle pointed probe set Tester knob indication: Voltage () E Is the voltage OK? 2 ECM coupler (Harness side) • Red, Black or B/Br wire open or shorted to L ground, or poor A, L or S connection P (Black) (Gray) • If wire and connection are OK, intermittent trou- YES ble or faulty ECM. M • Recheck each terminal and wire harness for open circuit and poor connection. A • Replace the ECM with a known good one, and inspect it again. S • Loose or poor contacts on the ECM coupler NO • Open or short circuit • Replace the TO sensor with a new one. 6)After repairing the trouble, clear the DTC using SDS tool. (4-27) “C24” (P0351), “C25” (P0352), “C26” (P0353) or “C27” (P0354) IGNITION SYSTEM MALFUNCTION * Refer to the IGNITION SYSTEM for details. (9-20)