Basic Troubleshooting Basic Troubleshooting Guide Customer Problem Analysis Sheet Basic Inspection Procedure Measuring Condition of Electronic Parts' Resistance The resistance measured at high temperature after running the vehicle may be high or low.
OBD-II review 1. Overview The California Air Resources Board (CARB)launched the regulation of OBD (On Board Diagnostics) for vehicles sold in California starting with the 1988 model year.
R
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the mode control actuator connector. 3. Verify that the mode control actuator operates to the defrost mode when connecting 12V to terminal 3 and grounding terminal 4. Verify that the mode control actuator operates to the vent mode when connected in reverse.