Audi Q5: Battery Interrupt Igniter
Overview - Battery Interrupt Igniter
1 - Connector
- For the Battery Interrupt Igniter -N253-
- Releasing and removing
2 - Nuts
- 15 Nm
3 - Battery Interrupt Igniter -N253-
- Available only with -item 4-
- Removing and installing. Refer to → Chapter "Battery Interrupt Igniter, Removing and Installing".
4 - Fuse Panel A -SA-
- Available only with -item 3-
- Removing and Installing. Refer to → Electrical Equipment; Rep. Gr.97; Relay Panels, Fuse Panels and E-Boxes; Overview - Relay Panels, Fuse Panels and E-Boxes.
5 - Cover
- For Fuse Panel A -SA-
6 - Positive Terminal Clamp
Battery Interrupt Igniter, Removing and Installing
Special tools and workshop equipment required
- Vehicle Diagnostic Tester
Removing
WARNING
- Follow all Safety Precautions when working with pyrotechnic components. Refer to → Chapter "Pyrotechnic Components Safety Precautions".
- Follow all regulations when disposing of pyrotechnic components. Refer to → Chapter "Airbag, Belt Tensioner and Battery Cut-Out Units, Storing, Transporting and Disposing".
Note
- If Airbag Indicator Lamp -K75- comes on after a vehicle accident, check whether crash data is stored using → Vehicle diagnostic tester. If this is the case, check if the malfunction "Resistance too high" for the Battery Interrupt Igniter -N253- is stored in the DTC memory. If this is the case, Battery Interrupt Igniter -N253- must be replaced.
- The Battery Interrupt Igniter -N253- interrupts the circuit electrically each time an airbag is deployed. The Battery Interrupt Igniter -N253- must be replaced after a deployment.
- The Battery Interrupt Igniter -N253- is available as a replacement part only together with Fuse Panel A -SA-.
- When just replacing the battery interrupt igniter -N253-, remove it from the replacement part and install it in Fuse Panel A -SA- as follows.
- Turn on the ignition.
- Disconnect the battery ground cable with the ignition turned on. Refer to → Electrical Equipment; Rep. Gr.27; Battery; Battery, Disconnecting and Connecting.
- Loosen the nut -1- a few turns and remove the positive cable and Fuse Panel A -SA- from the battery terminal.
- Remove Fuse Panel A -SA-.
- Release the spring -3- and open the flap -2- overFuse Panel A -SA--arrow-.
- Remove the nuts -2- and -3-.
WARNING
Before handling pyrotechnic components (for example, disconnecting the connector), the person handling it must "discharge static electricity". This can be done by touching the door striker, for example.
- Remove the battery interrupt igniter -4-.
- Press and remove the lock -5--arrow- and disconnect the connector -1-.
Installing
WARNING
- Follow all Safety Precautions when working with pyrotechnic components. Refer to → Chapter "Pyrotechnic Components Safety Precautions".
- Before handling pyrotechnic components (for example, connecting the connector), the person handling it must "discharge static electricity". This can be done by touching the door striker, for example.
Install in reverse order of removal. Note the following:
Note
Make sure the connectors are installed correctly and are secure.
WARNING
Ignition must be on when connecting battery. If pyrotechnic components (for example, airbag, belt tensioner) are not repaired correctly, they may deploy unintentionally after connecting battery. There must not be anyone inside the vehicle when connecting the battery.
DANGER!
When working on vehicles with the ignition already switched on or that are ready to drive there is a danger of the engine starting unexpectedly and of being poisoned by gas in enclosed areas. Risk of body parts and/or clothing being clamped or pulled.
Perform the following before switching on the ignition:
- Move the selector lever into P.
- Activate the parking brake
- Turn off the ignition.
- Open the hood
- Connect Battery Charger -VAS5095A- to the battery jump start terminal.
- Turn on the ignition.
- Connect the battery ground cable with the ignition turned on. Refer to → Electrical Equipment; Rep. Gr.27; Battery; Battery, Disconnecting and Connecting.
- Check the airbag control module DTC memory and correct any faults, if necessary, refer to Vehicle Diagnostic Tester.
