ECU Pinouts - Revision history

Grrrmachine at 19:13, 28 February 2015

2015-02-28T19:13:49Z

Grrrmachine at 22:47, 17 February 2012

2012-02-17T22:47:45Z

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Grrrmachine at 18:31, 17 February 2012

2012-02-17T18:31:26Z

Grrrmachine at 17:11, 17 February 2012

2012-02-17T17:11:06Z

Grrrmachine at 16:40, 17 February 2012

2012-02-17T16:40:03Z

Grrrmachine at 13:24, 17 February 2012

2012-02-17T13:24:13Z

Grrrmachine at 13:13, 17 February 2012

2012-02-17T13:13:48Z

Grrrmachine at 12:20, 17 February 2012

2012-02-17T12:20:05Z

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Grrrmachine at 09:39, 17 February 2012

2012-02-17T09:39:15Z

Grrrmachine: New page: The ECU is the very heart of your engine management system. Almost everything under the bonnet, and a lot of the stuff inside the car, connects to it in some way....

2012-02-17T09:30:20Z

New page: The ECU is the very heart of your engine management system. Almost everything under the bonnet, and a lot of the stuff inside the car, connects to it in some way....

New page

The [[ECU]] is the very heart of your [[Engine_Management|engine management]] system. Almost everything under the bonnet, and a lot of the stuff inside the car, connects to it in some way.

When things start going wrong, it's essential to check that signals are getting to or coming from the ECU, and that means testing the wiring. To help you identify what goes where, here are the pinouts for each generation of [[E30]] ECU.

=Jetronic=

{| class=wikitable
|-
!Pin
!Function
!Pin
!Function
!Image
|-
!1
|
!14
|
|rowspan=13|[[Image:JetronicPins.jpg]]
|-
|}

=Motronic 1.0=

The [[Motronic]] 1.0 [[ECU]] employs a 35-pin plug to connect to all the engine bay components.

{| class="wikitable"
|-
!Pin
!Function
!Pin
!Function
!Image
|-
!1
|[[Ignition#Coil|Ignition coil]] output
!19
|Ground
|rowspan=18|[[Image:Motronic1_0Pins.jpg]]
|-
!2
|[[Intake#Throttle_Position_Switch|Idle switch]]
!20
|[[DME|Main]] relay
|-
!3
|[[Intake#Throttle_Position_Switch|WOT]] switch
!21
|[[Instruments#Tachometer|Tachometer]]
|-
!4
|Cranking signal
!22
|[[Intake#AFM|AFM]] Temp sensor
|-
!5
|Ground/Crank PosS Gnd
!23
|Inlet Air Temp/Crank SpS Gnd
|-
!6
|[[Intake#AFM|AFM]] ground
!24
|[[Intake#Lambda|O2 sensor]] signal *
|-
!7
|[[Intake#AFM|AFM]] signal
!25
|[[Crank_Position_Sensor|Crank position sensor 1]]
|-
!8
|[[Crank_Position_Sensor|Crank speed sensor 1]]
!26
|[[Crank_Position_Sensor|Crank position sensor 2]]
|-
!9
|[[Intake#AFM|AFM]] supply
!27
|[[Crank_Position_Sensor|Crank speed sensor 2]]
|-
!10
|Auto only special
!28
|Water Pressure switch
|-
!11
|[[Instruments#Econometer|Fuel consumption gauge]]
!29
|[[Aircon|A/C]] switch (if installed)
|-
!12
|
!30
| +Inlet Air Temp
|-
!13
|[[Blue_Temp_Sensor|Water Temp]]
!31
|
|-
!14
|[[Fuel#Injectors|Injector]] output cyl 3&4
!32
|
|-
!15
|[[Fuel#Injectors|Injector]] output cyl 1&2
!33
|[[Intake#ICV|ICV]] pulse
|-
!16
|Ground
!34
|[[Intake#ICV|ICV]] pulse
|-
!17
|Ground
!35
|[[Fuel#Injectors|Injector]] ground
|-
!18
|
!
|
|-
|}

=Motronic 1.1/1.3=

{| class=wikitable
|-
!Pin!!Function!!Pin!!Function!!Pin!!Function!!Image
|-
!1
|
!20
|
!38
|
|rowspan=19|[[Image:Motronic1_3Pins.jpg]]
|-
!2
|}

@@ Line 6: / Line 6: @@
 =Jetronic=
-[[Jetronic]]'s primitive management system only controlled [[Fuel|fuelling]], so the ECU is little more than an injection control unit. The control model uses a 25-pin plug, with Pin 1 at the cable end. Note that the ECU connector is accompanied by the C104, a small 3-pin plug that data for the [[Instruments]].
+[[Jetronic]]'s primitive management system only controlled [[Fuel|fuelling]], so the ECU is little more than an injection control unit. The control model uses a 25-pin plug, with Pin 1 at the cable end. Note that the ECU connector is accompanied by the C104, a small 3-pin plug that provides data for the [[Instruments]].
 {| class=wikitable

@@ Line 6: / Line 6: @@
 =Jetronic=
-[[Jetronic]]'s primitive management system only controlled [[Fuel|fuelling]], so the ECU is little more than an injection control unit. The control model uses a 25-pin plug, with Pin 1 at the cable end.
+[[Jetronic]]'s primitive management system only controlled [[Fuel|fuelling]], so the ECU is little more than an injection control unit. The control model uses a 25-pin plug, with Pin 1 at the cable end. Note that the ECU connector is accompanied by the C104, a small 3-pin plug that data for the [[Instruments]].
 {| class=wikitable
@@ Line 98: / Line 98: @@
 !12
 |BR/YL
-|[[Fuel#Injectors|Injectors]] and |[[Instruments#Econometer|Econometer]]
+|[[Fuel#Injectors|Injectors]] and [[Instruments#Econometer|Econometer]]
 !25
+|
@@ Line 106: / Line 106: @@
 |BR
 |Ground
+!
+|
@@ Line 312: / Line 329: @@
 |RXO - [[Diagnostic_Plug|diagnostic plug]]
 !32
-|Fuel rate output- to instrument cluster
+|[[Instruments#Econometer|Econometer]]
 !50
+|
@@ Line 421: / Line 438: @@
 !6
 |BK
-|[[Instruments#Tachometer|Engine Speed output]]- to instrument cluster
+|[[Instruments#Tachometer|Tachometer]]
 !25
+|
@@ Line 494: / Line 511: @@
 !32
 |WT/BL
-|Fuel rate output- to instrument cluster
+|[[Instruments#Econometer|Econometer]]
 !50
+|

←Older revision		Revision as of 13:24, 17 February 2012
Line 1:		Line 1:
		+	[[Image:DSCF4449.jpg\|thumb\|right\|240px\|[[Motronic_1.3\|Motronic 1.3]] ECU plug]]
	The [[ECU]] is the very heart of your [[Engine_Management\|engine management]] system. Almost everything under the bonnet, and a lot of the stuff inside the car, connects to it in some way.		The [[ECU]] is the very heart of your [[Engine_Management\|engine management]] system. Almost everything under the bonnet, and a lot of the stuff inside the car, connects to it in some way.

@@ Line 126: / Line 126: @@
 |}
-=Motronic 1.1/1.3=
+=Motronic 1.1=
 {| class=wikitable
@@ Line 142: / Line 142: @@
 !2
 |}

@@ Line 130: / Line 130: @@
 =Motronic 1.0=
-The [[Motronic]] 1.0 [[ECU]] employs a 35-pin plug to connect to all the engine bay components.
+The [[Motronic 1.0]] ECU employs a 35-pin plug to connect to all the engine bay components.
 {| class="wikitable"

@@ Line 11: / Line 11: @@
 |-
 !Pin
 !Function
 !Pin
 !Function
 !Image
 |-
 !1
+|
+|
 |rowspan=13|[[Image:JetronicPins.jpg]]
 |-
 |}

@@ Line 201: / Line 201: @@
 |-
 !10
-|[[Intake#Lambda|O2 sensor]] input
+|[[Intake#Lambda|O2 sensor]] ground
 !29
+|
@@ Line 273: / Line 273: @@
 =Motronic 1.3=