Checking the power supply and ground for the supplemental restraint system module (SRS)

Checking the power supply

Check the fuse in the passenger compartment fusebox for the supplemental restraint system module (SRS).
NOTE:
If a fuse is blown, check the circuit after the fuse before replacing the fuse. Check for a short-circuit to ground. Then replace the fuse.
Check the power supply cable between the X-supply from the ignition switch and the supplemental restraint system module (SRS). Check for an open-circuit
Check the power supply cable between the 15-supply and the supplemental restraint system module (SRS). Check for an open-circuit. Check for a short-circuit to ground.

Checking the ground terminal

The supplemental restraint system module (SRS) is grounded when it is screwed into place in the car.
The resistance between the control module casing and the ground terminal must be 0 Ω.

Remedy as necessary

Other information

To access and replace the supplemental restraint system module (SRS) and connector, see Supplemental restraint system module (SRS), replacing
To connect the breakout box, see Connecting the breakout box
With the ignition off and the supplemental restraint system module (SRS) installed, the resistance between the control module casing and the ground terminal must be approximately 0 Ω.
For other values, see Signal specification
For information about checking the wiring, see Checking wiring and terminals

Fig 1: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

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