Air Bag Control Module: Service and Repair

CDC. Replacement Of The SRS Control Unit

Disassembly







CDC1. Preparation
Make a note of any radio code.
Ignition off.
Disconnect the battery negative lead.


CDC2. Removal of SRS control unit






WARNING! Make sure the battery is disconnected before removing or installing the control unit.


Remove:
Panels and covers. See Body and Frame, Interior Trim-Console
Screws and connectors.

1 screw on the console and hold the console back with the connectors
1 cover on the control unit
3 screws, Torx 30, on the control unit.
Lift the control unit up.


CDC3. Removal of connector from the SRS control unit






Remove:
Push the button (1) in and move the lock mounting (2) forwards
Pull the connector in the direction of arrow (3).


CAUTION! Avoid touching the contacts on the SRS control unit. There is a risk of an electrostatic discharge which can cause damage to the control unit.

Assembly

CDC4. Installation of connector to SRS control unit






WARNING! Make sure the battery is disconnected before removing or installing the control unit.


Install:
Push the connector into the control unit in the direction of arrow (1)
Secure the connector on the control unit by moving the lock mounting (2) back until it locks behind the button. Do this before installing the control unit.


CDC5. Installation of SRS control unit





Install 3 screws, Torx 30. Torque setting = 10 Nm (7.5 ft-lb).


CAUTION! The screws are self-tapping screws, therefore make sure the screw threads are correctly aligned before the screws are installed. Take care not to damage the grounding strip when installing the screws.


NOTE: Use the removed screws. If replacing screws with new screws, use a type approved for grounding.


CAUTION! It is important to install the control unit securely in the body to ensure that it will work correctly.


The electrical grounding path is through one fixing screw to the grounding strip. It is essential, therefore, that the fixing screws have sufficient contact with the body. Install other components in reverse order.


Final Work







CDC6. Final check


WARNING! Make sure that nobody is inside the car when connecting the battery.


After installing all the parts, do the following:
Turn the ignition key to position II
Connect the battery negative lead.


NOTE: Check that the SRS warning lamp is not broken by turning the ignition key to position II. The SRS warning lamp should come on and then go off after approximately 3 seconds.


Check that the SRS warning lamp in the combination instrument does not remain on. If the lamp remains on, use Volvo Aftersales Diagnostic and Information System (VADIS) and symptom entry or Volvo System Tester (VST) to find the diagnostic trouble codes.