Checking The Component

Check the female and male parts of the connectors for the Supplemental Restraint System Module (SRS) and the front impact sensor. The cable terminals must not be damaged or pressed back.

Check the cable between the Supplemental Restraint System Module (SRS) terminal #19B (47), #18B(46) and connector terminals #2 and #1 on the front left front impact sensor. Check for a short-circuit to supply voltage. Check for a short-circuit to ground.

Check the resistance in the signal cable between terminals #19B (47) and #18B (46) for the Supplemental Restraint System Module (SRS). The resistance must be infinite.

If no fault is found, replace the front collision sensor.

Remedy as necessary.

Other information: 

• To access or replace the front impact sensor, see COLLISION SENSOR FRONT, REPLACING
• For information about signals, see SIGNAL SPECIFICATION
• For information about the repair of SRS wiring, see CABLE HARNESS SRS SYSTEM, REPAIR
• see CHECKING WIRING AND TERMINALS .

Fig 3: Identifying Front Impact Sensor Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Fig 4: Identifying Ohm Meter

Courtesy of VOLVO CARS CORPORATION

See: VERIFICATION