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Old 04-09-2023, 06:34 PM   #1
DropDetroit
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Default 1997 318ti Engine Cable Pin Out

Looking for the X69 and X6031 pinouts, I have below what I've come up with so far. Working on an engine swap, and found some write-ups here and there, most did not apply to my vehicle but some did. Used wiring Diagrams to get the information I currently have. I will put below everything I have so far down below. Thank you in advance

X20 Pin Color/Stripe Connection
1 Yellow Can High
2 Black Can Low
3 Grey/Violet Double Temp Switch
4 Black/Blue A/C Compressor Relay
5 Black/Grey A/C Pressure Switch
6 Violet/Grey A/C On Signal Dash
7 Black/Violet EWS II Immobilization
8 Red/White Aux Fan Normal Speed Relay 12V Switched
9 Brown/Red Vehicle Speed ABS/ASC
10 - Not Used
11 Brown/Yellow Coolant Temp To Cluster
12 Brown/Violet Coolant Temp To Cluster
13 Green/Violet Fuel Pump Relay 12V
14 - Not Used
15 Black/Green Starter Relay Unloader Hot On Start
16 White/Yellow Data Link RXD Pin 15 Diagnostics
17 White/Violet Data Link TXD Pin 20 Diagnostics
18 Black/Yellow Ignition Switch Starter
19 White/Green Check Engine/Si Reset Pin 7 Diagnostics
20 Black RPM To Cluster
21 Green Switched 12V Power to ECU
22 Green/White Switched 12V Data Link Pin 16 Diagnostics
23 Brown/Green Oil Pressure Switch To Cluster
24 White/Black Econometer MPG
25 Blue Alternator

x6031 Pin Color/Stripe Connection
1 Grey Check Engine Indicator
2 Green/Blue Carbon Canister Valve
3 Green/Red Fuel Consumption ECU Input
4 White/Violet Data LinkTxD Input/Output OBD Pin 7
5 Yellow/Red Fuel Tank Pressure Signal
6 Grey/White 5v Power Output Power from ecu
7 Brown/Black Ground For Sensors
8 Black/Violet EWS II Control Module Input
9 Red/White Activate Auxiliary Fan
10 Grey/White (ABS/ASC) Throttle Position Sensor
11 Grey/Blue (ABS/ASC) Hot Film Mass Air Meter
12 Grey/Black (ABS/ASC) ???

X69 Pin Color/Stripe Connection
11 Brown/Gray Brake Switch Test Signal
12 Blue/Red Brake Pedal Position
13 Yellow/Blue Program Auto Mode Switch
14 Yellow/Brown Cruise Control Signal
15 Violet ?
16 Brown/Violet Shift-Lock Solenoid
17 Gray/Yellow Kick Down Signal
18 Blue/Black ?
19 Brown/Black ?
20 Blue/White ?
21 Brown/White ?
22 Yellow/Green ?
23 Yellow/Blue Automatic Mode Signal
24 Yellow/White ?
25 Gray/Brown Fault Indicator Signal

Last edited by DropDetroit; 04-09-2023 at 06:38 PM. Reason: Spacing was incorrect
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Old 04-12-2023, 03:08 PM   #2
J!m
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Default

You need the model year specific ETMs which I can provide. There were subtle changes each year so there is no “one” answer to the question.
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Old 04-12-2023, 04:19 PM   #3
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My year is 1997. I spent some time tracing each wire, unfortunately had to cut most of the insulation off, but I did come up with a designation for each pin. It will be attached in a google docs link. Wouldn't hurt to have another set of eyes look over it and make sure I'm not making a silly mistake. I hope this helps anybody that may be in the same boat as me trying to find x6031 and x69

https://docs.google.com/document/d/1...vJdWDhZ0/edit?
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