Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

EBA – 01 29 9 784 738
BMW Installation Instructions

Only for models with standard DWA

Tools and Equipment Required

Phillips screwdriver
Normal screwdriver
3/8 inch reversible ratchet
3/8 inch extension
3/8 inch socket wrench insert, waf 10mm, 13mm, 17mm
Drill
Spiral drill, dia. 2mm, 9mm
Universal knife
Wire stripping pliers
Diagonal cutting pliers
Cable pliers, HWB no. 81 24 9 408 449
Test lamp
Electric torch
Two-sided adhesive tape

Preparatory work

  1. Print out error memory.
  2. Disconnect vehicle battery/batteries.
  3. Remove rear step boards on left and right sides.
  4. Remove rear bench seat or left and right single seats.
  5. Remove backrest or left and right single backrests.
  6. Open cable duct in left and right rear side sills.
  7. Vehicles with basic module: Remove cover of equipment carrier in seat box, rear left.
  8. Disconnect central alarm in seat box, rear left.

All models (except E34 Touring)

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Left and right C-column

Remove edge protection (1) from C­ column trim area in direction of arrows. Mark drill points (2, 3).

A = 110 mm
B = 160 mm
C = 9 mm

Remove trim from C-column.

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Drill through drill point (1) with a spiral drill, dia. 2 mm.

Drill through drill point (2) with a spiral drill, dia. 9 mm.

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Note

Install the ultrasonic sensor (2) with the tip switch on the trim (3) of the left hand C-column.

Insert lead (1) of ultrasonic sensor (2) through bore in trim (3) of C-column.

Secure ultrasonic sensor (2) to trim (3) of C-column with Phillips screw (4).

Reinstall trim (3) on C-column.

Lay leads of ultrasonic sensors along standard vehicle cable harness, and into the right hand seat box.

Only E34 Touring

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Left and right C-columns

Remove edge protection ( 1) from C-col­ umn trim area in direction of arrows .

Mark drill points (2, 3) . A = 9 mm

B = 110 mm

C = 160 mm

Remove trim on (1) from C-column.

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Drill through drill point (1) with a spiral drill, dia. 2 mm.

Drill through drill point (2) with a spiral drill, dia. 9 mm.

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Note

Install the ultrasonic sensor (2) with long lead (1) on trim (3) of the left hand C-col­ umn.

Insert lead (1) of ultrasonic sensor (2)

through bore in trim (3) of C-co!umn. Secure ultrasonic sensor (2) to trim (3) of C-column with Phillips screw (4).

Reinstall trim (3) of C-column.

Lay leads of ultrasonic sensors along standard vehicle cable harness , and into the right hand seat box.

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Cut out floor covering (1) in right hand rear seat box area on prop shaft tunnel as per drawing.

A = 50 mm

B = 100 mm

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Secure ultrasonic module (1) to prop shaft tunnel with two-sided adhesive tape.

Caution

Insert plug (2) into same colour of recep­ tacle in ultrasonic module (1).

Insert plugs (2, 3) of ultrasonic sensor in ultrasonic module (1) as per drawing, secure earth cables to rear right hand seat box and lay cable harness of ultra­ sonic module (1 ) along standard vehicle cable harness and into left rear seat box.

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Note

There are two different versions of the ultrasonic module (1).

Version I.

Ultrasonic module (1) with three outputs (2, 3, 4).

Version II

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Ultrasonic module (1) with four outputs (2, 3, 4 , 5).

Version I

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

With version I, a supplement kit (see figure) is also required.

Connect cable (1) with -cable colour red- from cable harness of ultrasonic module to distributor box (2).

Only models with basic module

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Terminals 30, 15R are connected to the black 8-pin plug X322 (1) on the left of the equipment carrier in the left-hand, rear seat box . Release plug connection X322 (1).

Version I (terminal 30)

Connect leads of supplement kit -cable colour red/white- to -cable colour red/white- plug point 4 of plug X322 (1).

Version I (terminal 1SR)

Connect leads of supplement kit -cable colour brown/violet- to ·cable colour violet/white- plug point 2 of plug X322 (1).

Version II (terminal 30)

Connect leads of cable harness of ultra­ sonic module -cable colour red- to – cable colour red/white- plug point 4 of plug X322 (1).

Version II (terminal 15R)

Connect leads of cable harness of ultra­ sonic module -cable colour brown/vi­ olet- to -cable colour violet/white- plug point 2 of plug X322 (1).

Secure earth lead – cable colour brown- to rear left-hand seat box.

Secure distributor box to rear left-hand seat box with two-sided adhesive tape.

Only models up to 09/91 with central locking module

Terminal 30 is connected to the black 15-pin plug X1216 (1) on the left of the central locking module A30 (2).

Terminal 15R is connected to the white 26-pin plug X1217 (3) on the left of cen­ tral locking module A30 (2).

Release plug connections X1216(1) and X1217(3).

Version I (terminal 30)

Connect leads of supplement kit -cable colour red/white- to -cable colour red/white- plug point 4 of plug X1216 (1).

Version I (terminal 15R)

Connect leads of supplement kit -cable colour brown/violet- to -cable colour green/red- plug X1217 (3).

Version II (terminal 30)

Connect leads of cable harness of ultra­ sonic module -cable colour red- to – cable colour red/white- plug point 4 of plug X1216 (1).

Version II (terminal 1SR)

Connect leads of cable harness of ultra­ sonic module -cable colour brown/vi­ olet- to -cable colour green/red- plug point 2 of plug X1217 (3).

Secure earth lead – cable colour brown- to rear left-hand seat box.

Secure distributor box to rear left-hand seat box with two-sided adhesive tape.

Only E34 and Touring models after 09/91

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

with central locking module

Terminals 30/ 15R, are connected to the white 26-pin plug X13012 (1) on central locking module A30 (2).

Release and disconnect plug connec­ tion X13012 (1) .

Version I (terminal 30)

Connect leads of supplement kit -cable colour red/white- to -cable colour red/green- plug point 3 of plug X13012 (1).

Version I (terminal 1SR)

Connect leads of supplement kit -cable colour brown/violet- to -cable colour violet/yellow- plug point 7 of plug X13012 (1).

Version II (terminal 30)

Connect leads of cable harness of ultra­ sonic module -cable colour red- to – cable colour red/green- plug point 3 of plug X13012 (1) .

Version II (terminal 1SR)

Connect leads of cable harness of ultra­ sonic module -cable colour brown/vi­ olet- to -cable colour violet/yellow- plug point 7 of plug X13012 (1).

Secure earth lead – cable colour brown­

to rear left-hand seat box.

Secure distributor box to rear left-hand seat box with two-sided adhesive tape.

All models

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Ultrasonic Module (USM) BMW 5 series E34, BMW 7 series E32

Cut cable ( 1) -cable colour vi­olet/green/yellow- off plug point 20 at least 50 mm from plug (2) of central alarm system (3) and strip insulations from both ends.

Crimp contacts (4, 5) on cable (1), apply insulations (6, 7) and connect to cable

-cable colour brown/yellow- of cable harness of ultrasonic module.

Notes

To inspect the ultrasonic module (USM), the front panel must be closed and the radio must be installed.

Models without radio

Simulate an installed radio.

Function and Setting the Sensitivity of Ultrasonic Sensors

The ultrasonic module is set to medium sensitivity in the factory. Sit down on the rear seat of the vehicle and, with the as­ sistance of a second person, switch on the alarm system with the ignition key. To enable the ultrasonic field to be generated, sit perfectly still for at least 40 seconds.

After 40 seconds, move in the vehicle. This will set off the alarm.

If subsequent adjustment is required, use the Phillips screwdriver (1) from the installation kit to adjust the input control­ ler of the ultrasonic module (2). Every time a movement is recognized, the LED display on the ultrasonic module will light up and the LED display will flash rapidly to confirm this.

Caution

Depending on the sensitivity setting of the ultrasonic module, movement of air in the passenger cell caused by switching on the independent heating or ventilation sys­ tems may trigger the alarm.

Function of the Ultrasonic Module (DWA)

As soon as terminal 15R is discon­ nected, thereby earthing all other con­ nected consumers, the ultrasonic module is activated. This means that any movements detected in the vehicle are indicated by causing the LED dis­ play to light up.

Once no motion has been detected in the passenger cell for more than 40 sec­ onds, alarm readiness is activated.

The next movement detected causes the switch transistor in the ultrasonic module to earth the monitoring lead of the DWA for approx. one second, set­ ting off the alarm. After this , another minimum period of 40 seconds must elapse without motion being detected before alarm readiness can be reacti­ vated.

Trouble Shooting Guide

Ultrasonic module does not function.

The switch of the LED display is pressed in.

The delay period of 40 seconds has not been respected.

The earth lead of the ultrasonic module has not been connected.

If, when the system is switched on, more than three alarms are triggered by the ultrasonic unit, after the third alarm, no more alarms are triggered until the system has been reset.

Ultrasonic Unit Triggers False Alarm

  • Objects (e.g. mascots) lying in the inner space which move when vehicle shakes.
  • Sensitivity is set too high.
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