DTC B1920/77 Short in Rear Driver Side Pretensioner Squib Circuit; DTC B1921/77 Open in Rear Driver Side Pretensioner Squib Circuit; DTC B1922/77 Short to GND in Rear Driver Side Pretensioner Squib Circuit; DTC B1923/77 Short to B+ in Rear Driver Side Pretensioner Squib Circuit: Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
The rear driver side pretensioner squib circuit consists of the center airbag sensor assembly and the rear seat outer belt assembly LH.
This circuit instructs SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the rear driver side pretensioner squib circuit.
DTC DETECTION CONDITION CHART
| DTC No. |
DTC Detection Condition |
Trouble Area |
| B1920/77 |
- The center airbag sensor assembly receives a line short circuit signal 5 times in the rear driver side pretensioner squib circuit during primary check
- Rear driver side pretensioner squib malfunction
- Center airbag sensor assembly malfunction
|
- No 2 floor wire
- Rear seat outer belt assembly LH (Rear driver side pretensioner squib)
- Center airbag sensor assembly
|
| B1921/77 |
- The center airbag sensor assembly receives an open circuit signal in the rear driver side pretensioner squib circuit for 2 seconds
- Rear driver side pretensioner squib malfunction
- Center airbag sensor assembly malfunction
|
- No 2 floor wire
- Rear seat outer belt assembly LH (Rear driver side pretensioner squib)
- Center airbag sensor assembly
|
| B1922/77 |
- The center airbag sensor assembly receives a short circuit to ground signal in the rear driver side pretensioner squib circuit for 0 5 seconds
- Rear driver side pretensioner squib malfunction
- Center airbag sensor assembly malfunction
|
- No 2 floor wire
- Rear seat outer belt assembly LH (Rear driver side pretensioner squib)
- Center airbag sensor assembly
|
| B1923/77 |
- The center airbag sensor assembly receives a short circuit to B+ signal in the rear driver side pretensioner squib circuit for 0 5 seconds
- Rear driver side pretensioner squib malfunction
- Center airbag sensor assembly malfunction
|
- No 2 floor wire
- Rear seat outer belt assembly LH (Rear driver side pretensioner squib)
- Center airbag sensor assembly
|