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| Unscrew hexagon nut -1- (tightening torque 20 Nm). |
Installation is performed in reverse sequence; note the following: |
Note t
| Do not remove sealing plugs from new hydraulic unit until corresponding brake line is ready to be fitted. |
t
| If sealing plugs are removed from hydraulic unit sooner, brake fluid may escape and it may no longer be possible to fill and bleed the unit properly. |
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| When assembling control unit and hydraulic unit, make sure contact pins of hydraulic unit do not cant on control unit solenoids. |
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| Connect lines in accordance with markings → Chapter. |
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| Secure ABS unit to bracket. |
Note Do not tighten bolts completely. This will make it easier to attach the individual brake lines to the hydraulic unit. |
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| Tighten all brake line connections. |
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| After tightening brake lines, tighten hydraulic unit. |
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| If a new control unit has been fitted, it must be encoded. |
To do so, use the vehicle diagnosis, testing and information system -VAS 5051 x - or -VAS 5052-. |
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| Connect vehicle diagnosis, testing and information system and select „function/component“ for function test → Chapter. |
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| „01 - Self-diagnosis compatible systems“ |
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| „J104 - Control unit for ABS/TCS/ESP Mark 60“ |
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| „J104 - Control unit for ABS/TCS/ESP, Functions“ |
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| „J104 - Encoding control unit“ |
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| Perform final control diagnosis after attaching brake lines to hydraulic unit. Vehicle diagnosis, testing and information system -VAS 5051 x - or -VAS 5052- |
Note t
| If the ABS control unit (with ESP) -J104- is renewed, the following senders must be calibrated: |
t
| Steering angle sender -G85- |
t
| Lateral acceleration sender -G200- |
t
| Brake pressure sender 1 -G201- |
t
| Longitudinal acceleration sender -G251- (only four-wheel drive vehicles) |
t
| From model year 2009 onwards, steering angle and brake pressure are also measured by the ABS control unit (with ESP) -J104-; these values must then be calibrated. |
t
| ESP road test and system test must then be carried out. |
To do so, use the vehicle diagnosis, testing and information system -VAS 5051 x - or -VAS 5052-. |
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| Select function tests via „Function/component selection“ → Chapter. |
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| „01 - Self-diagnosis compatible systems“ |
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| „J104 - Control unit for ABS/TCS/ESP Mark 60“ |
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| „J104 - Control unit for ABS/TCS/ESP, Functions“ |
On vehicles with Mark 60EC system |
If the ABS control unit -J104- is renewed on vehicles with Mark 60EC system, an additional basic setting must be performed for the inlet valves and separating valves → Chapter. |
To do so, use the vehicle diagnosis, testing and information system -VAS 5051 x - or -VAS 5052-. |
Note Final control diagnosis can be used to establish whether line connections have been interchanged. |
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