The Actron CP9087 is a diagnostic tool designed to test electronic engine control sensors and ignition systems. The manual provides safety guidelines, describes the controls and accessories included with the unit, and details how to install and check the internal battery.
Detailed procedures are provided for testing various vehicle components, including Engine Coolant Temperature (ECT), Intake Air Temperature (IAT), Throttle Position (TP), EGR Valve Position (EVP), Oxygen sensors, Engine Knock, Manifold Absolute Pressure (MAP/BARO), Mass Air Flow (MAF), Vane Air Flow, and Crankshaft/Camshaft position sensors. The guide also covers testing ignition modules using voltage checks, continuity tests, diode checks, and frequency measurements.
A 9-volt transistor radio battery must be installed, and an alkaline battery should be used because conventional batteries are too weak for ignition module testing.
The battery is considered good only if the top TEST light turns on when the RANGE switch is set to HIGH and the FUNCTION switch is set to OHMS.
You must always operate the vehicle in a well-ventilated area and never inhale exhaust gases because they are very poisonous.