Notifications
Clear all

Engine Wiring Harness pinout

3 Posts
2 Users
3 Likes
111 Views
Olivier Ta
(@olivier-llg82)
Active Member
Joined: 2 years ago
Posts: 4
Topic starter  

Hello all,

I have an no reading on intake air temperature on our SR3 RS #484. Looking at SR3 wiring diagram found in the resource library I have some issues mapping wire numbers to ECU pinout:

Screenshot 2024 02 17 at 08.06.39

eg wire 123 (bottom left) -> which pin on the ecu ? pin 123 does not exist on the upper schema.

I'll appreciate any help

 

Regards


   
Quote
Olivier Ta
(@olivier-llg82)
Active Member
Joined: 2 years ago
Posts: 4
Topic starter  

Changed the air temp sensor and fixed the issue. Still does not understand how to read the ECU pinout.


   
CharleyH reacted
ReplyQuote
Dan Phillips
(@rlm-dan)
Reputable Member
Joined: 5 years ago
Posts: 262
 

Sensor itself is normally the problem with these. Glad you have sorted it.

Keep an eye on the reading, in earlier cars there is changes to the map depending on air temp but the sensors have not always been the most reliable and can cause problems. If it is reading out you are better off unplugging it and just letting it sit at the default temperature of 10° C.

No idea on these numbers and the wire 123, I can only assume that this relates to something within the wiring loom as it is only an 88 pin connector!

You could pin it out by testing continuity with the air temp plug wires and each pin on the ECU hairbrush until you find one that connects.

Early Calibrations I have show the signal should be pin 16. 


   
Josh Spray and CharleyH reacted
ReplyQuote
Share: