Supplemental Restraint System Control Unit, Component Description - GF91.60-S-4080A
Model 447
With Code XM7 (MOPF II)
Fig 1: Supplemental Restraint System Control Unit Components Location - Model 447 With Code XM7 (Shown On Model 447.8)
Supplemental Restraint System (SRS) control unit, shown on model 447.8
The numbers on the pins indicate the pin numbering of the slots.
Overview
This document contains information on:
- General
- Function
- Ground connection
- Voltage supply
General
The Supplemental Restraint System (SRS) control unit (N2/5) is installed in the vehicle interior on the transmission tunnel below the instrument panel support.
Function
The Supplemental Restraint System (SRS) control unit (N2/5) controls safety-relevant component parts in the vehicle, e.g. the airbags.
The following input factors and initial parameters are read in or output over direct lines by the Supplemental Restraint System (SRS) control unit (N2/5):
| Input factors over a direct line | Initial parameters over a direct line |
|---|---|
| Terminal 15 | - |
| Circuit 30t | - |
| Circuit 31 | - |
| LIN E2 (seat occupancy recognition LIN) | LIN E2 (seat occupancy recognition LIN) |
| - | Actuation of mitigation gas cartridge squib (R66) |
| - | Ground connection for mitigation gas cartridge squib (R66) |
| - | Actuation of pyrofuse (F39/1) |
| - | Ground connection for pyrofuse (F39/1) |
| - | Actuation of pyrofuse A1 (F1fA1) |
| - | Ground connection for pyrofuse A1 (F1fA1) |
| - | Crash signal to signal acquisition and actuation module (SAM) control unit (N10/1) |
| - | Crash signal to ME-SFI control unit (N3/34)/CDI control unit (N3/40) |
| Signal for driver seat occupancy recognition sensor (B41) | - |
| - | Ground connection for driver seat occupancy recognition sensor (B41) |
| Signal for driver seat belt buckle restraint system switch (S68/1) | - |
| - | Ground connection for driver seat belt buckle restraint system switch (S68/1) |
| - | Actuation of driver seat belt tensioner squib (R12/1) |
| - | Ground connection for driver seat belt tensioner squib (R12/1) |
| - | Actuation of driver thorax/pelvis side airbag squib (R12/30) |
| - | Ground connection for driver thorax/pelvis side airbag squib (R12/30) |
| - | Actuation of center front passenger seat belt tensioner squib (R12/34) |
| - | Ground connection for center front passenger seat belt tensioner squib (R12/34) |
| Signal for front passenger seat occupancy recognition (B84/5) | - |
| - | Ground connection for front passenger seat occupancy recognition (B84/5) |
| Signal for front passenger seat belt buckle restraint system switch (S68/2) | - |
| - | Ground connection for front passenger seat belt buckle restraint system switch |
| - | Actuation of front passenger seat belt tensioner squib (R12/2) |
| - | Ground connection for front passenger seat belt tensioner squib (R12/2) |
| - | Actuation of front passenger thorax/pelvis side airbag squib (R12/31) |
| - | Ground connection for front passenger thorax/pelvis side airbag squib (R12/31) |
| - | - |
| Signal for center front passenger seat occupancy recognition (B48/4) | - |
| - | Ground connection for center front passenger seat occupancy recognition (B48/4) |
| Signal for center front passenger seat belt buckle restraint system switch (S68/5) | - |
| - | Ground connection for center front passenger seat belt buckle restraint system switch (S68/5) |
| - | Actuation of left 1st rear seat row reversible belt tensioner squib (R12/105) |
| - | Ground connection for left 1st rear seat row reversible belt tensioner squib (R12/105) |
| - | Actuation of right 1st rear seat row reversible belt tensioner squib (R12/106) |
| - | Ground connection for right 1st rear seat row reversible belt tensioner squib (R12/106) |
| - | Actuation of left 2nd rear seat row reversible belt tensioner squib (R12/107) |
| - | Ground connection for left 2nd rear seat row reversible belt tensioner squib (R12/107) |
| - | Actuation of right 2nd rear seat row reversible belt tensioner squib (R12/108) |
| - | Ground connection for right 2nd rear seat row reversible belt tensioner squib (R12/108) |
| - | Actuation of left front window airbag squib (R12/14) |
| - | Ground connection for left front window airbag squib (R12/14) |
| - | Actuation of right front window airbag squib (R12/15) |
| - | Ground connection for right front window airbag squib (R12/15) |
| - | Actuation of left center window airbag squib (R12/18) |
| - | Ground connection for left center window airbag squib (R12/18) |
| - | Actuation of right center window airbag squib (R12/19) |
| - | Ground connection for right center window airbag squib (R12/19) |
| - | Actuation of left rear window airbag squib (R12/22) |
| - | Ground connection for left rear window airbag squib (R12/22) |
| - | Actuation of right rear window airbag squib (R12/23) |
| - | Ground connection for right rear window airbag squib (R12/23) |
| Plus signal for left C-pillar body acceleration sensor (B164/2) | - |
| Minus signal for left C-pillar body acceleration sensor (B164/2) | - |
| Plus signal for right C-pillar body acceleration sensor (B164/3) | - |
| Minus signal for right C-pillar body acceleration sensor (B164/3) | - |
| Plus signal for left sliding door pressure sensor (B165) | - |
| Minus signal for left sliding door pressure sensor (B165) | - |
| Plus signal for right sliding door pressure sensor (B165/1) | - |
| Minus signal for right sliding door pressure sensor (B165/1) | - |
| Plus signal for left front door pressure sensor (B48/7) | - |
| Minus signal for left front door pressure sensor (B48/7) | - |
| Plus signal for right front door pressure sensor (B48/8) | - |
| Minus signal for right front door pressure sensor (B48/8) | - |
| Plus signal for left B-pillar body acceleration sensor (B164) | - |
| Minus signal for left B-pillar body acceleration sensor (B164) | - |
| Plus signal for right B-pillar body acceleration sensor (164/1) | - |
| Minus signal for right B-pillar body acceleration sensor (164/1) | - |
| Plus signal for left frontal acceleration sensor (B167) | - |
| Minus signal for left frontal acceleration sensor (B167) | - |
| Plus signal for right frontal acceleration sensor (B167/1) | - |
| Minus signal for right frontal acceleration sensor (B167/1) | - |
| - | Actuation of driver's airbag squib (R12/7)/driver's airbag squib 1 (R12/7r1) |
| - | Ground connection for driver's airbag squib (R12/7)/driver's airbag squib 1 (R12/7r1) |
| - | Actuation of driver's airbag squib 2 (R12/7r2) |
| - | Ground connection for driver's airbag squib 2 (R12/7r2) |
| - | Actuation of front passenger airbag squib (R12/8)/front passenger airbag squib 1 (R12/8r1) |
| - | Ground connection for front passenger airbag squib (R12/8)/front passenger airbag squib 1 (R12/8r1) |
| - | Actuation of front passenger airbag squib 2 (R12/8r2) |
| - | Ground connection for front passenger airbag squib 2 (R12/8r2) |
Input factors and initial parameters for the following control units are sent or received by the Supplemental Restraint System (SRS) control unit (N2/5) via the vehicle dynamics CAN (CANH):
| Input and output parameters via vehicle dynamics CAN (CANH) | Supplemental information |
|---|---|
| Electronic Stability Program (ESP) control unit (N30/4) | - |
Input factors and initial parameters for the following control units are sent or received by the Supplemental Restraint System (SRS) control unit (N2/5) via the user interface CAN (CANHMI):
| Input factors and initial parameters via the user interface CAN (CANHMI) | Supplemental information |
|---|---|
| Left front reversible emergency tensioning retractor (A76) | With CODE JP1 (PRE-SAFE) |
| Right front reversible emergency tensioning retractor (A76/1) | With CODE JP1 (PRE-SAFE) |
| Electronic ignition lock (EZS) control unit (N73/8) | - |
| Tire pressure monitor (TPM) control unit (N88/1) | With code RY2 (Tire pressure loss warning system on front axle and rear axle, wireless) |
| Driver camera control unit (N168/1) | With code JK8 (Driver camera) |
Ground connection
The "circuit 31" ground connection is made directly via the threaded connection of the housing of the Supplemental Restraint System (SRS) control unit (N2/5) to the body.
Voltage supply
The "circuit 15" power supply is provided via the signal acquisition and actuation module (SAM) control unit (N10/1).
The "circuit 30t" power supply is provided via the firewall fuse and relay module (K40/11).