Checking communication

Ensure that the battery voltage exceeds 12 V.

Connect a battery charger if necessary.

Check the communication on the CAN network regarding the passenger airbag warning lamp (PAD).

If the Passenger airbag warning lamp (PAD) is OK and the communication on the CAN network functions as it should, the PAD lamp should come on immediately and remain lit for a few seconds to confirm the lamp is working.

Carry out the following checks:

• Note the Passenger airbag warning lamp (PAD).
• Turn the ignition key from position 0 directly to position II.

Select alternative. 

1. PAD lamp is not lit

   Refer to Fault-tracing information 

2. Passenger airbag warning lamp (PAD) comes on immediately.

   Refer to Fault-tracing information 

3. Passenger airbag warning lamp (PAD) comes on after a delay of 0.5 seconds or more.

   Refer to Replacing supplemental restraint system module (SRS) 

Fig 2: Identifying Rear View Mirror

Courtesy of VOLVO CARS OF NORTH AMERICA.