FI SYSTEM DIAGNOSIS 4-87 Step 4 4 1) Turn the ignition switch OFF. 2) Connect the position sensor coupler. 3) Measure the position sensor output voltage at fully close posi- tion and fully open position. 4) Insert the needle pointed probes to the back side of the posi- tion sensor lead wire coupler. (+ Yellow – - B/Br) 5) Disconnect the EXCVA motor lead wire coupler 2. 6) To set the EXCV to fully close position, apply 12 volts to A 12 V and B terminals. Positive wire – A (Pink wire) terminal 4 Negative wire – B (Gray wire) terminal V 7) Turn the ignition switch ON. 8) Measure the position sensor output voltage at fully close posi- tion. 9) Then, to set the EXCV to fully open position, apply 12 volts to B and A terminals. Positive wire – B (Gray wire) terminal Negative wire – A (Pink wire) terminal 10)Measure the position sensor output voltage at fully open position. E Position sensor output voltage 4 EXCV is fully close: 0.5 – 1.3 V L EXCV is fully open: 3.7 – 4.5 V P (+ Yellow – - White) 09900-25008: Multi circuit tester set M 09900-25009: Needle pointed probe set A Tester knob indication: Voltage () Is the voltage OK? S 12 V YES Replace the ECM with a known good one, and inspect it again. NO Go to Step 5. 11)After repairing the trouble, clear the DTC using SDS tool. (4-27)