Initial Inspection and Diagnostic Overview

NOTE ON SYSTEM CIRCUIT INSPECTION
^ Never connect any tester (voltmeter, ohmmeter, or whatever) to EBCM when its coupler is disconnected. Attempt to do it may cause damage to EBCM.
^ Never connect an ohmmeter to EBCM with its coupler connected to it. Attempt to do it may cause damage to EBCM and sensors.
^ Be sure to use a voltmeter with high impedance (M ohms/V minimum) or a digital type voltmeter. Any other voltmeter should not be used because accurate measurements are not obtained.
^ When disconnecting and connecting coupler, make sure to turn ignition switch OFF.
^ When checking connection of terminals, check its male half for bend and female half for excessive opening and both for locking (looseness), corrosion, dust, etc.





^ When connecting a probe of any tester to coupler terminal, be sure to connect it from wire harness side of coupler.





^ When connecting tester probe from terminal side of coupler because it can't be connected from harness side, use extra care not to bend male terminal of coupler of force its female terminal open for connection.
In case of such coupler as shown connect probe as shown to avoid opening female terminal.
Never connect probe where male terminal is supposed to fit.





^ Before measuring voltage at each terminal, check to make sure that battery voltage is 11 V or higher. Such terminal voltage check at low battery voltage will lead to erroneous diagnosis.