Diagnostic Tests: Notes

WARNING: Before servicing steering column or instrument panel components on vehicles with Supplemental Inflatable Restraint (SIR) system, disable air bag system. See DISABLING & ACTIVATING SUPPLEMENTAL RESTRAIN SYSTEM in AIR BAG RESTRAINT SYSTEM article. DO NOT apply electrical power to any component on steering column without deactivating air bag system. Air bag may deploy.

CAUTION: When battery is disconnected, radio will go into anti-theft protection mode. Obtain radio anti-theft protection code from owner prior to servicing vehicle.

NOTE: Unless stated otherwise in testing procedures, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance. Voltage readings may vary slightly due to battery condition or charging rate. When checking harness connectors, always backprobe connectors. If necessary to check connector from front side (without harness), DO NOT bend connector terminals.