DTC Testing Precautions

STATIC DISCHARGE
1. Before handling electronic parts discharge static charges by touching ground or maintaining a ground connection to a bare skin area.
2. Never touch control unit connector pins, integrated circuit connector pins, or soldered components on the control unit circuit board.

TESTING
1. When measuring voltage at the control unit harness connector disconnect harness connector with the ignition OFF then turn ignition ON as necessary.
2. To prevent deforming control unit harness connectors do not probe terminals directly. Instead insert a pin from the harness side and perform measurements through pin.

CONTROL UNIT DAMAGE
1. Do not try to disassemble the control unit.
2. Before performing electrical welding disconnect the battery, climate control, injection, cruise control, control unit, and radio.
3. If temperatures may exceed 80°C (176°F) remove all control units.
4. Avoid getting water on any fuel and engine control system components.
5. Never apply battery power to a component unless directed to do so in a test procedure.