Quickly locates and isolates ECU signal faults. Noid and idle air control valve lights test the ECU control signal. Simply unplug the wiring harness and connect the appropriate light to see if the component is receiving a trigger signal. The kit includes a 1.2m fiber optic cable so the light can be seen from the driver's seat. Easy to use and has a wide vehicle application. IAC light compatibility: 700 TBI/FPI with 4-pin flat or square connectors FUNCTION: The Noid Light Fuel Injection Pulse Test Kit is a fuel injection tester that confirms that the injectors are receiving the opening and closing signal (spray signal) when diagnosing performance problems; If your non-starting vehicle has a rough idle, connect the injector connectors, EFI/ECU/PCM/PMU/AARP/NATO/idle control and let it rule out any electrical problems; Not for diagnosing clogged or shorted injectors or confirming fuel movement, but helps to rule out (or eliminate) problems. Fuel Injection Tester Noid Light Set Note: Due to different production batches, the color of the plastic boxes is random, do not accept the specified color Color: black Material: plastic Package contents: 1 x Fuel Injection Tester (11 pcs) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.