Incorrect microphone wiring harness in telephone installation prewiring
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Incorrect microphone wiring harness in telephone installation prewiring
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Saab 9-5 up to and including VIN W3059826 (M98)
An unscreened microphone wiring harness has been mistakenly fitted in cars up to and including the above VIN. This has meant that unwanted sound could be heard from the microphone.
41 09 187 3-pin connector, microphone
40 63 970 Cable lugs (2 pcs.)
91 20 957 Cable lugs (2 pcs.)
Microphone cable approx. 2.5 m
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-
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2-core screened cable with PVC insulation, 2 x 0.5 mm. Screen conductor, 0.5 mm.
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Note
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Check with the telephone manufacturer whether the telephone uses high or low level for the microphone output before commencing.
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The illustration above shows how the new screened cable is run in the car up to the microphone in the roof console.
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1.
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Remove the SID unit, radio and radio compartment as well as the ACC/MCC unit.
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2.
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Remove the glove box, cover plate under the glove box, trim cover by the centre console and the A-pillar trim on the passenger side.
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3.
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Remove the sun visor and front courtesy handle on the passenger side as well as the roof console.
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Work to be done on the roof console
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1.
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Insert the screened cable through the headlining from the windscreen towards the roof console. Unplug the microphone connector and cut the wiring harness adjacent to the nearest cable retainer on the roof.
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2.
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Fit 2 cable lugs to the new wiring harness as shown in the table below and connect the new wiring harness to the microphone connector in the roof console.
Connect the wiring harness to the microphone.
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Pin
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Function
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1
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High level, microphone input
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2
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Low level, microphone input
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3
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Microphone ground
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3.
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Run the wiring harness down to the dashboard via the A-pillar on the passenger side.
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4.
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Secure the wiring harness to the roof and along the A-pillar on the passenger side with pieces of adhesive tape to prevent squeaking and rattling.
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Work to be done on the centre console
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1.
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Fasten the wiring harness along the existing wiring towards the centre console. Detach the 10-pin connector from its retainer on the heating and ventilation unit.
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2.
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Extract the pins from the brown/grey cable pos. 10 and the green cable pos. 3, see wiring diagram on the last page. Cut off the cables of the extracted pins at the beginning of the wiring harness.
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3.
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Fit two cable lugs to the cables coming from the new wiring harness as shown in the table below. The cable from the microphone connector pin 3 and the wiring harness screen are to be connected to the same pin 3 in the 10-pin connector in the centre console. Fit a piece of shrink sleeve at the end of the wiring harness to insulate the screen.
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Function
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Pins 10-pin connector
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Pins 3-pin connector
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Power supply +30
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1
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-
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Power supply +15
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2
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-
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Ground, microphone
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3 (+screen)
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3
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Ground, mobile phone
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4
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-
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Telephone mute
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5
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-
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Rheostat
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6
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-
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Telephone output signal
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7
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-
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Telephone output ground
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8
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-
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Not used
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9
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-
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Microphone output
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10
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2 (low level) 1 (high level)
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4.
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Fasten the new microphone wiring harness to the heating and ventilation unit wiring with a cable tie.
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5.
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Refit the 10-pin connector in its retainer on the heating and ventilation unit and fasten the new wiring harness along the wiring towards the A-pillar with cable ties.
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6.
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Check the function of the microphone.
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7.
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Refit all dismantled components.
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Warranty/Time information
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Failed Object: 37 130
Fault/Reason code: 40
Location code: 09
Warranty Type (US):
Repair/Action code: 01
Labour Operation (US):
Time: 0.9 hours
