[R129 SL] the inductive sensor from the automatic gear control

[Jan Kuylaars]

Designation	 Description	 Coordinates	 Reference	 

 <javascript:zoomPart('A1')> A1 	 Instrument cluster	 10L
PE54.30	
 <javascript:zoomPart('A1p8')> A1p8	 Electronic speedometer	 9L

 <javascript:zoomPart('A2')> A2	 Radio	 8A	 PE82.60	
 <javascript:zoomPart('A2/4')> A2/4	 Radio control module	 8A

 <javascript:zoomPart('L2')> L2 	 Transmission inductive speed
sensor	 10A	  	
 <javascript:zoomPart('N3')> N3 	 Injection system control module
2A	  	
 <javascript:zoomPart('N4/1')> N4/1	 EA/CC/ISC control module
5A	  	
 <javascript:zoomPart('N4/2')> N4/2	 CC control module (with
reference resistor)	 6A	  	
 <javascript:zoomPart('N10/2')> N10/2	 Combination relay module (turn
signal with trailer coupling, rear window defroster, wiper motor, ATA)
7L	  	
 <javascript:zoomPart('N15/1')> N15/1	 Transmission control module
(TCM) (5-speed automatic)	 3A	  	
 <javascript:zoomPart('N22')> N22	 AAC pushbutton control module
2L	  	
 <javascript:zoomPart('N52')> N52	 Power soft top control module
7A	  	
 <javascript:zoomPart('X18')> X18 	 Interior/taillamp harness
connector (12-pole)	 7E	 B.1/4	
 <javascript:zoomPart('X26/12')> X26/12	 Interior/transmission connector
9E	 B.1/6
B.1/22	
 <javascript:zoomPart('X30/1')> X30/1	 Multi-function connector block
1E	 B.1/5	
 <javascript:zoomPart('X85/2')> X85/2	 Heater/interior connector
(12-pole)	 1H	 B.1/5	
All values measured to ground unless otherwise noted 	
Conn./Plug/Pin	 Pin Information	 Test Value	 Comments	
 <javascript:zoomPart('A1')> A1	  	  	  	
1.9	 RF VSS output, generated by L6/2, processed in IC and sent to
other ECMs	 Ignition on, lift front of vehicle.Turn right front
wheel > 1 rev/sec by hand > 3 VAC or with vehicle moving	 20 mph
/ 200 Hz35 mph / 330 Hzsquare wave	
1.111.12	 RF VSS sensor, - input.RF VSS sensor, + input.
Ignition on, lift front of vehicle.Turn right front wheel > 1 rev/sec by
hand > 3 VAC or with vehicle moving	 Note 1	
 <javascript:zoomPart('N3')> N3	  	  	  	
29	 RF VSS signal input, controls engine management function
depending on vehicle speed	 same as A1 1.9	 Note 1Feed from X30/1	
 <javascript:zoomPart('N15/1')> N15/1	  	  	  	
2.16	 RF VSS signal input, controls AT system function depending on
vehicle speed	 same as A1 1.9	 Feed from X30/1	
 <javascript:zoomPart('N4/1')> N4/1	  	  	  	
12	 RF VSS signal input, controls EA/CC/ISC system function
depending on vehicle speed	 same as A1 1.9	 Feed from X30/1	
 <javascript:zoomPart('N4/2')> N4/2	  	  	  	
11	 RF VSS signal input, controls CC system function depending on
vehicle speed	 same as A1 1.9	 Feed from X30/1	
 <javascript:zoomPart('N52')> N52	  	  	  	
Y.35	 RF VSS signal input 	same as A1 1.9	 Feed from X18	
 <javascript:zoomPart('A2(A2/4)')> A2(A2/4)	  	  	  	
3.3	 RF VSS signal input, controls loudness depending on vehicle
speed	 same as A1 1.9	 Note 2Feed from X18	
 <javascript:zoomPart('N10/2')> N10/2	  	  	  	
1.5	 RF VSS signal input 	same as A1 1.9	 Feed to X18 and X30/1	
 <javascript:zoomPart('N22')> N22	  	  	  	
1.5	 RF VSS signal input, controls A/C system depending on vehicle
speed	 same as A1 1.9	 Feed from X18	
Note 1	 To test, spin wheel at 1 rev/sec, measure at least 120 mVAC
between both wires of sensor. If voltage is OK, measure the sensor's
resistance while pulling, twisting and bending the sensor wires, looking
for intermittent opens. Finally, check the sensor tip and rotor teeth
for dirt or breakage. An oscilloscope can also be used to check the
waveform - chipped or dirty teeth show up as missing or malformed waves.

Note 2	 Substitution test use signal generator set to approx. 3Vpp
Loudness will increase when frequency is raised from 0 to 300 Hertz	
 
Met vriendelijke groeten,
Jan Kuylaars
Technical Manager Rian bv.
 

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