Connector, handling and checks
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Connector, handling and checks
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1.
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It is important when removing captive connectors to release the lock before removing the connector. Make sure the connector locks properly when connecting.
Before removing a connector you must ensure that no fluid, dirt or the like can enter the connector.
Examples of different types of connectors on some cars:
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1.A.
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Pull out the slide to release the connector's lock.
After connection the connector is locked by pushing in the slide.
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Note
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Use a small screwdriver to make it easier to loosen the lock on the connector.
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1.B.
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Push in the locking tab to release the connector's lock.
Make sure the connector is locked properly when connecting.
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1.C.
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Pull out the slide to release the connector's lock.
After connection the connector is locked by pushing in the slide.
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1.D.
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Push in the clamp's locking catch and fold the clamp forward.
When connecting, fold back the clamp to lock the connector.
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Note
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Make sure that the clamp is locked in the right position to guarantee contact between the connectors.
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1.E.
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Lift up the locking tab to release the connector's lock.
Make sure the connector is locked properly when connecting.
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1.F.
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Press in the connector's locking tab to release the clamp. Release the connector's slide and at the same time fold forward the clamp.
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Note
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The connector can be damaged if greater force than necessary is used to fold the clamp forward without releasing the slide.
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When connecting, fold back the clamp to lock the connector.
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2.
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Ground yourself, by taking hold of the car's body/engine, when removing or fitting the connector on the car's control module.
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3.
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Never pull the wiring harness when removing the connector.
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4.
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Never touch the pins on a control module with your hands or clothes.
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Important
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Incorrect handing or the use of the wrong tool can damage the sleeves in the connector.
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Use a test cable (part no. 86 12 731) of the correct size to avoid damaging the sleeves in the connector.
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5.
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When performing measurements, only use measurement probes designed for this purpose to avoid damage to the connectors. Use the right size test cable (part. no. 86 12 731).
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6.
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The connector may only be repaired using the specified special tools and spare parts.
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7.
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The following connectors must not be repaired:
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Shielded cables/coaxial cable (e.g. ESP sensor cable)
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Airbag system and pyrotechnic seat belt tensioner system
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High voltage cable (e.g. ignition system, xenon lamp).
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Note
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Before fitting a connector you must ensure that no fluid, dirt or the like can enter the connector.
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1.
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Check that there are no contact problems on the connection.
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2.
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Check the connectors, splicing sleeves and crimps with regard to oxidation, dislodged pins and the pin's clamping force.
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Important
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Incorrect handing or the use of the wrong tool can damage the sleeves in the connector.
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Use a test cable (part no. 86 12 731) of the correct size to avoid damaging the sleeves in the connector.
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3.
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A test cable with the right pin size (from kit 86 12 731) must be used to check the connector's clamping force.
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Note
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A test cable that is too large will damage the connector's sleeves.
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Insert the test cable's pins in the connector's pins to assess the clamping force on the relevant pins. Poor clamping force on the connector's pins can cause connector play.
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Also check that the pins mate at the same height as the other pins in the connector. A too low mating height indicates pushed back pins in the connector, which can cause connector play.
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4.
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Check the cables or connectors to ensure there is no breakage.
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5.
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Check the wiring harness, splicing sleeves and earth connections.
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