What triggers a seat belt pretensioner?
Generally, pretensioners are wired to the same central control processor that activates the car’s air bags. The processor monitors mechanical or electronic motion sensors that respond to the sudden deceleration of an impact. When an impact is detected, the processor activates the pretensioner and then the air bag.
What is the primary purpose of a seat belt pretensioner?
The seat belt pretensioner is one of many actuators involved in a pre-crash safety system. The purpose of the pretensioner is to secure the occupant safely to their seat by tightening their seat belt, in order to reduce the risk of an injury.
What is a seat belt pretensioner and its purpose?
A pretensioner is designed to retract some of the webbing of a seatbelt the instant a collision occurs, tightening the seatbelt to restrain occupants quickly and reducing the amount they are thrown forward in a moderate or severe frontal crash. Load limiters help protect occupants from seatbelt-inflicted injury.
How to test for a fault in a Volvo 850?
CODE TESTING for fault code diagnosis. 1) Disconnect diagnostic unit “A”. Turn ignition on. Check for voltage at diagnostic connector terminal No. 4. If voltage is not present, check fuse and wiring. If voltage is present, turn ignition off. No. 8 and ground. Ohmmeter should indicate approximately zero ohms.
Where can I find the Volvo 850 service manual?
Below you can find the complete service and repair manual for the Volvo 850. All subjects (actually it are the chapters of the 850 service manual) are seperated in a single webpage. Click on the item you want to view and it will open in a new tab/window. Seats (powered and heated) troubleshooting, diagnostics, wiring diagram & repair instructions
What are the diagnostic codes for a 1995 Volvo?
Diagnostic codes for 1995-1998 Volvos are here. Wait… 1995 is listed in both categories! That’s right. It was an overlap year where you can find OBD-I or OBD-II or both. Many Volvos have both. Sometimes the OBD-II port will be present in front of the coin tray, but will not be functional.
Where is diagnostic unit a located on a Volvo 850?
Codes are retrieved using diagnostic unit “A” located in engine compartment, in front of right strut tower. Diagnostic unit “A” is equipped with an LED indicator, activation button and function selector cable. See Fig. 1. NOTE: Diagnostic unit “B” is not used for engine performance applications.