Component Tests and General Diagnostics

Checking power supply and ground terminals

Checking power supply and ground terminals

Checking the power supply
- Check fuse 11/C25 in the passenger compartment fusebox for the SRS control module. Note! If a fuse is blown, check the circuit after the fuse for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault before replacing the fuse. Then replace the fuse. For further information about the circuit after the fuse, refer to the wiring diagram
- Check the power supply cable between the X-supply from the ignition switch and control module terminal #27B (55) for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Check the power supply cable between the 15-supply and control module terminal #28B (56). Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Checking the ground terminal
- The SRS control module is grounded when it is screwed into place in the car.
Remedy as necessary

Other information
- To access and replace the SRS control module and connector, see Supplemental restraint system module (SRS), replacing Service and Repair
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
- The voltage to terminal #27B (55) must be battery voltage when the ignition is in positions I and II
- The voltage to terminal #28B (56) must be battery voltage when the ignition is in positions I and II
- With the ignition off and the SRS control module installed, the resistance between the control module casing and the ground terminal must be approximately 0 ohms
- For other values, see Signal specification Signal Description, Supplemental Restraint System (SRS) Control Unit.









Was a fault detected?

Yes - FAULT FOUND

No - No Fault Found

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