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B2446, 2447, B2448, B2449

Read the instructions below then start the fault diagnostic procedure.

Symptom: Airbag warning lamp on.

B2446, 2447, B2448, B2449


B2446 Passenger Belt Tensioner. Open Circuit

B2447 Passenger Belt Tensioner. Short to Ground

B2448 Passenger Belt Tensioner. Short to B+

B2449 Passenger Belt Tensioner. Resistance too Low



Fault symptoms

Airbag warning lamp on.

Conditions

The following conditions are applicable to the respective diagnostic trouble codes:


B2446

The resistance measured by the control module is greater than 3.9 Ω for 10 seconds

The resistance measured by the control module is greater than 225 Ω for 160 ms


Diagnosis is not performed if DTC B2447 or B2448 has been generated.


B2447

The voltage applied to control module pin 15 is lower than 1.5 V for 1.25 seconds



B2448

The voltage applied to control module pin 45 is higher than 3.5 V for 1.25 seconds



B2449

The resistance measured by the control module is lower than 1.4 Ω for 20 seconds


Diagnosis is not performed if DTC B2447 or B2448 has been generated.