For 1990-2009 cars

• | Do not expose the inflator modules to temperatures above 65°C (150°F).

• | Verify that you are using the correct replacement part number. Do not substitute a component from a different vehicle.

• | Replace the following components if necessary. Do not attempt to repair these components:

- | The inflatable restraint Sensing and Diagnostic Module (SDM)

- | The inflatable restraint IP module

- | The inflatable restraint steering wheel module

- | The inflatable restraint steering wheel module coil

• | Use only new or remanufactured parts from an authorized original equipment manufacturer dealer. Do not use salvaged parts for repairs to the SIR system.

• | Discard any of the following components which have been dropped from a height of 91 cm (3 ft) or greater. Do not install these parts into a vehicle:

- | The inflatable restraint Sensing and Diagnostic Module (SDM)

- | The inflatable restraint IP module

- | The inflatable restraint steering wheel module

- | The inflatable restraint steering wheel module coil

• | When you replace the inflatable restraint Sensing and Diagnostic Module (SDM), verify that the following conditions are met:

- | The mounting surface is clean

- | The arrow on the module points toward the front of the vehicle

- | The module is flat on the mounting surface, parallel to the vehicle datum line

- | The module fasteners are installed and tightened as specified

• | In order to avoid setting false diagnostic trouble codes, only apply power to the SIR system when one of the following two conditions is met:

- | All SIR system components are properly mounted and electrically connected

- | A diagnostic procedure directs you to apply power

• | Begin diagnosis of malfunctions with the SIR Diagnostic System Check. Failure to begin diagnosis with this procedure could cause extended diagnostic time, incorrect diagnosis, and unneeded parts replacement. Perform the SIR Diagnostic System Check in order to verify the following:

- | The proper operation of the AIR BAG warning lamp

- | Communication with the inflatable restraint Sensing and Diagnostic Module (SDM) through the serial data line

- | The presence or absence of diagnostic trouble codes

- | Whether additional diagnosis is required and where the information resides