Hi, I'm hoping someone can help me with the below C101 pin#14 and pin#15 questions. I have been reviewing ETM (87, 88, and 89), e30zone.net, and stricklyeta.net, but can't seem to find the answer I am looking for. I just finished replacing 87' 325e auto with 88' 325i manual and Motronic 1.3. The car came with 89' 325i cluster. So far, I finished connecting two wires (econometer and tachometer) from C104 connector to the 88 325i ECU (Motronic 1.3), disconnected pin#20 at C101, and wired the auto to manual reverse. I am stuck on what to do with C101 pin#14 and pin#15. These two pins are not used in 325e but are used on 325i.
1) C101 pin#14 (speed signal out to ECU) - How do I wire the vehicle speed input from the cluster to the ECU? My car, although it has an 89' 325i cluster, there is no wire coming out of C2 pin#10(white plug) and to the C101 chassis side pin#14. Because of the 325e chassis, C101 chassis side pin#14 is not used so no signal going to the ECU. Currently, the vehicle speed output wire (C3 pin#26, BR/RD) from the cluster goes to the OBC/multifunction clock. I am wondering if I can simply splice C3 pin#26 wire from the cluster to the ECU pin#29 directly. Or, do I need to add a new wire at C2 pin#10 and bring it to the fuse box and then to the C101 Chassis side? For 88/89 325i, C2 Pin#10 (89' ETM 1360-8) goes to the C101 chassis side and then from C101 pin#14 to ECU pin#29.
2) C101 pin#15 (unloader relay) - Do I need to bring the C1 pin#1 (blur plug) wire from the cluster to the C101 chassis side? Is this critical? 325e C101 chassis side pin#15 is not used so there is no signal currently going to the ECU.
Thank you for your time.
1) C101 pin#14 (speed signal out to ECU) - How do I wire the vehicle speed input from the cluster to the ECU? My car, although it has an 89' 325i cluster, there is no wire coming out of C2 pin#10(white plug) and to the C101 chassis side pin#14. Because of the 325e chassis, C101 chassis side pin#14 is not used so no signal going to the ECU. Currently, the vehicle speed output wire (C3 pin#26, BR/RD) from the cluster goes to the OBC/multifunction clock. I am wondering if I can simply splice C3 pin#26 wire from the cluster to the ECU pin#29 directly. Or, do I need to add a new wire at C2 pin#10 and bring it to the fuse box and then to the C101 Chassis side? For 88/89 325i, C2 Pin#10 (89' ETM 1360-8) goes to the C101 chassis side and then from C101 pin#14 to ECU pin#29.
2) C101 pin#15 (unloader relay) - Do I need to bring the C1 pin#1 (blur plug) wire from the cluster to the C101 chassis side? Is this critical? 325e C101 chassis side pin#15 is not used so there is no signal currently going to the ECU.
Thank you for your time.
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