Cylinder Identification (CID) Sensor

Turn ignition off. Connect BOB, leaving ECA connected. Tu rn ignition on, but DO NOT start engine. Measure voltage at BOB test pin No. 34 (Yellow wire). Voltage should be less than one volt or more than 10 volts. Start engine and run at idle. Voltage should be 3-5 volts. Replace CID sensor if voltage is not as specified.