AIRmatic control unit, component description - GF32.22-P-5109FQ
MODEL 218 up to model year 2014 with CODE 488 (Steel/air suspension) without CODE 489 (AIRMATIC (air suspension with continuous damper adjustment))
MODEL 218 up to model year 2014 with CODE 489 (AIRMATIC (air suspension with continuous damper adjustment)) without CODE 488 (Steel/air suspension)
Shown on model 218.3 with CODE 489 (AIRmatic (air suspension with continuous variable damping))
Location
The AIRmatic control unit is mounted under the front-passenger footplate.
Task
The AIRmatic control unit has the following tasks:
- Reading in of sensors, pickups and signals
- Evaluation of input factors
- Actuation of components
Reading in of sensors, pickups and signals
The input factors are read in via the following connections:
- Direct lines
- Chassis CAN (CAN E)
Direct lines
The following components are read in via direct lines:
- Circuit 30g (switched battery positive)
- circuit 31
- Left rear level sensor (B22/7)
- Left front level sensor (B22/8)
- Right front level sensor (B22/9)
- Right rear level sensor (B22/10)
- Left front body acceleration sensor (B24/3)
- Right front body acceleration sensor (B24/4)
- Left rear body acceleration sensor (B24/5)
- AIRmatic pressure sensor (Y36/6b1)
Chassis CAN
The AIRmatic control unit is a subscriber on the chassis CAN and receives signals from, for example, the following control unit:
- Electronic Stability Program control unit (N30/4) (without CODE 233 (DISTRONIC PLUS)) or Premium Electronic Stability Program control unit (N30/7) (with CODE 233 (DISTRONIC PLUS))
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.
Actuation of components
Components are actuated with the following lines:
- Direct lines
- Chassis CAN
Direct lines
The following components are actuated via direct lines:
- AIRmatic pressure reduction valve (A9/1y1)
- AIRmatic relay (K67)
- Left front level control valve (Y36/6y1), with CODE 489 (AIRmatic (air suspension with continuous variable damping))
- Right front level control valve (Y36/6y2), with CODE 489 (AIRmatic (air suspension with continuous variable damping))
- Left rear level control valve (Y36/6y3)
- Right rear level control valve (Y36/6y4)
- AIRmatic central reservoir filling valve (Y36/6y5)
- Left front axle damping valve unit (Y51)
- Right front axle damping valve unit (Y52)
- Left rear axle damping valve unit (Y53)
- Right rear axle damping valve unit (Y54)
Chassis CAN
The AIRmatic control unit is a subscriber on the chassis CAN and sends signals to, for example, the following control unit:
- Instrument cluster (A1)
| Technical data Designation |
Unit | Values | Tolerance range | Remarks |
|---|---|---|---|---|
| AIRMATIC control unit | ||||
| Supply voltage | V | 13 | - | - |
| Voltage limits | V | 10 | - | Lower limit value |
| 16 | - | Upper limit value | ||
| Power consumption | A | 0.1 | - | Standby |
| 0.7 | - | Action | ||
| mA | < 0.1 | - | Quiescent current | |
| Reverse polarity protection | - | - | - | Yes |
| Additional specific parameters | - | - | - | All inputs and outputs are designed to be short-circuit-proof to ground and operating voltage. |
| Special features | - | - | - | The AIRmatic control unit can withstand a voltage of U = 18 V for t = 60 min. and a voltage of U = 27 V for t = 60 s. |
| Flash capability/coding capability | - | - | - | Yes |
| Left front level sensor Right front level sensor Left rear level sensor Right rear level sensor |
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| Measured variable | - | - | - | Angles |
| Measuring range | ° | ±35 | - | About center position |
| Supply voltage | V | 5 | ±0.05 | - |
| Total power consumption | mA | 7.5 | - | - |
| Switch-on power consumption | mA | 40 | - | For t = 5 μs |
| Rated sensitivity | mV/° | 57.14 | - | - |
| Switch-on delay | ms | < 100 | - | - |
| Load resistance | kΩ | 10 | - | To signal ground (in AIRmatic control unit) |
| Load capacitance | NF | 22 | - | To signal ground (in AIRmatic control unit) |
| Left front body lateral acceleration sensor Right front body lateral acceleration sensor Left rear body lateral acceleration sensor |
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| Measured variable | - | - | - | Acceleration |
| Measuring range | g | ±1.6 | - | For 0.5 Hz < f < 20 Hz |
| Supply voltage | V | 5 | ±0.25 | Short-circuit protected to circuit 30g and circuit 31 |
| Power consumption | mA | >10 | - | - |
| Switch-on power consumption | mA | ≤30 | - | For t ≤ 5 ms |
| Load resistance | kΩ | 10 | - | To signal ground (in AIRmatic control unit) |
| Load capacitance | NF | 22 | - | - |
| AIRMATIC pressure sensor | ||||
| Measured variable | - | - | - | Pressure |
| Measuring range | bar | 0 - 35 | - | - |
| Supply voltage | V | 5 | ±0.25 | - |
| Power consumption | mA | ≤12 | - | - |
| Switch-on power consumption | - | - | - | No increased switch-on power consumption |
| Output current | mA | ≤1.2 | - | Sensor is current sink |
| Load resistance | kΩ | ≤4.7 | - | To sensor supply (in AIRmatic control unit) |
| Temperature range | °C | -40 - 120 | - | - |
| Left front level control valve, only with CODE 489 (AIRmatic (air suspension with continuous variable damping)) Right front level control valve, only with CODE 489 (AIRmatic (air suspension with continuous variable damping)) Left rear level control valve Right rear level valve |
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| Rated voltage | V | 7.5 - 15 | - | - |
| Rated resistance | Ω | 6.8 | ±7% | At T = 20 °C |
| Switching/holding current | A | 1 | - | Current regulation by AIRmatic control unit |
| Push current | A | < 2 | - | For t = 200 ms |
| Valve inductance | mH | 23.2 | ±20% | - |
| Frequency of pulse width modulation (PWM) | Hz | 1000 | - | - |
| Function | - | - | - | Normally closed |
| Temperature range | °C | -40 - 120 | - | - |
| Protection system | - | - | - | IP6K6/IP6K7 |
| AIRMATIC relay | - | - | ||
| Rated voltage | V | 12 | - | - |
| Winding resistance | Ω | 66.3 - 89.7 | At T = 23 °C | |
| Inductance | mH | 520 | - | At f = 1 kHz, armature open |
| 1500 | - | At f = 1 kHz, armature closed | ||
| Pull-in current | A | 0.13 | ±3 % | At T = 23 °C |
| Pull-in voltage | V | ≤7.2 | - | At T = 23 °C |
| Drop-out voltage | V | ≥1.6 | - | At T = 23 °C |
| Release voltage peak | V | ≤80 | - | - |
| Pull-in time | ms | ≤10 | - | At U = 12 V |
| Release time | ms | ≤10 | - | - |
| Continuous load current (working contact) | A | 70 | - | - |
| AIRMATIC pressure reduction valve | ||||
| Rated voltage range | V | 7.5 - 16 | - | - |
| Rated resistance | Ω | 14.9 - 16.5 | - | At T = 20 °C |
| Switching/holding current | A | 0.39 | - | - |
| Inductance | mH | 85 | - | - |
| Frequency of PWM | Hz | 1000 | - | - |
| Pull-in time | ms | ≤50 | - | - |
| Release time | ms | ≤50 | - | - |
| Function | - | - | - | Normally closed |
| Temperature range | °C | -40 - 80 | - | - |
| AIRMATIC central reservoir filling valve | ||||
| Rated voltage range | V | 7.5 - 15 | - | - |
| Rated resistance | Ω | 6.8 | ±7% | At T = 20 °C |
| Switching/holding current | A | 0.6 | - | Current regulation by AIRmatic control unit |
| Push current | A | < 1.35 | - | For t = 200 ms |
| Valve inductance | mH | 23.2 | ±20% | - |
| Frequency of PWM | Hz | 1000 | - | - |
| Temperature range | °C | - 40 - 120 | - | - |
| Protection system | - | - | - | IP6K6/IP6K7 |
| Left front axle damping valve unit, right front axle damping valve unit, left rear axle damping valve unit, right rear axle damping valve unit | ||||
| Coil resistance | Ω | 4.7 | ±0.2 | At T = 23 °C ±5 °C |
| Maximum current | A | 1.6 | - | - |
| Inductance | mH | 8.1 | - | At f = 1 kHz |
| Coil temperature | °C | -40 - 180 | - | - |
| PWM carrier frequency | kHz | 2 | - | - |
| Wiring diagram of AIRmatic control unit | PE32.22-P-2101-97XAA |