Pretest Inspection & Diagnostic Procedure

Following precautions and procedures must be followed:

• Always follow air bag service precautions to avoid air bag deployment and possible personal injury. See AIR BAG SAFETY PRECAUTIONS .
• After component replacement, ensure proper system operation. See SYSTEM OPERATION CHECK .
• When testing voltage or continuity at ACM, use terminal side (not wire end) of connector. DO NOT probe wire through insulation.
• Always check any Technical Service Bulletins (TSBs) that apply to vehicle.
• Always use most current DRBIII diagnostic program cartridge available to prevent erroneous Diagnostic Trouble Codes (DTCs) or test results.
• When using diagnostic tests, use DRBIII voltmeter unless instructed to use an external voltmeter or test light.
• When performing electrical tests, prevent accidental shorting of terminals. Such shorts can damage fuses or components and may cause a second DTC to be set, making diagnosis of original problem more difficult.
• Vehicle must have a fully-charged battery and functional charging system.
• Each time a connector is disconnected, inspect it to ensure it is in good condition. Always focus on circuit being tested. Dirt, water and corrosion are most common problems in connectors.
• Always disconnect DRBIII after use.
• Always disconnect DRBIII before charging battery.