Join Date: Jul 2011
Location: Cologne, Germany
according to a document (Motronic ML4.1) I have it states: "the CAS consists of an inductive magnet that radiates a magnetic field"
& yes, the CAS/Crank angle sensor Bosch # you give above is definitely a 90> Motronic ML4.1 sensor, not 82>89 L-Jetronic (which used 2 flywheel sensors instead)
so with the Motronic CAS sensor, we have the following:
pin#1 (yellow) goes to ECU pin #25
pin#2 (red) goes to ECU pin #23
pin#3 is a screen wire, also goes to ECU pin #23 (basically against interference from Radio etc)
the ECU itself is grounded at pins #16 and #19 (from engine main ECU ground bundle at cylinder head)
the ECU supply voltage is 5V (4.4V), not 12V
whether any of that helps?
Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.
Last edited by spiderserie4; 01-23-2019 at 01:37 AM.