K20 Engine Control Module X1

WARNING: This page is about a different car, the 2021 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of GENERAL MOTORS COMPANY

Connector Part Information

Harness Type: Engine
OEM Connector: 34566-0303
Service Connector: 13574782
Description: 73-Way F 0.64, 2.8 Series, Sealed (BK with BU Terminal Position Assurance)

Terminal Part Information

Terminal Type ID	Terminated Lead	Diagnostic Test Probe	Terminal Removal Tool
I	13587518	J-35616-35 (VT)	J-38125-11A
II	19351723	J-35616-64B (LT BU)	J-38125-215A

Pin	Size	Color	Circuit	Function	Terminal Type ID	Option
1 - 3	-	-	-	Not Occupied	-	-
4	0.5	WH	4499	High Speed GMLAN Serial Data [-] 7	II	LFY
5	0.5	BK / VT	1272	Accelerator Pedal Position Low Reference 2	II	LFY
6	0.5	YE / WH	1161	Accelerator Pedal Position Signal 1	II	LFY
7	0.5	BK / BU	1271	Accelerator Pedal Position Low Reference 1	II	LFY
8	0.5	WH	7494	High Speed GMLAN Serial Data [-] 3	II	LFY
9	0.5	BK / YE	5382	Brake Position Sensor Low Reference	II	LFY
10 - 11	-	-	-	Not Occupied	-	-
12	0.5	WH	2501	High Speed GMLAN Serial Data [-] 1	II	LFY
13	0.5	WH / BU	6311	Cruise/ETC/TCC Brake Signal	II	LFY
14	0.5	WH / GY	459	A/C Compressor Clutch Relay Control	II	LFY
15	0.5	YE	5991	Powertrain Relay Coil Control	II	LFY
16	0.5	BN / WH	419	Check Engine Indicator Control	II	LFY
17 - 19	-	-	-	Not Occupied	-	-
20	0.5	BU / BN	4498	High Speed GMLAN Serial Data [+] 7	II	LFY
21	0.5	BN / RD	1274	Accelerator Pedal Position 5V Reference 2	II	LFY
22	0.5	GN / WH	1162	Accelerator Pedal Position Signal 2	II	LFY
23	0.5	WH / RD	1164	Accelerator Pedal Position 5V Reference 1	II	LFY
24	0.5	BU / BK	7493	High Speed GMLAN Serial Data [+] 3	II	LFY
25	0.5	WH / RD	5381	Brake Position Sensor 5V Reference	II	LFY
26	0.5	WH / GN	5380	Brake Position Sensor Signal	II	LFY
27	-	-	-	Not Occupied	-	-
28	0.5	BU	2500	High Speed GMLAN Serial Data [+] 1	II	LFY
29	-	-	-	Not Occupied	-	-
30	0.5	GN / WH	492	Mass Air Flow Sensor Signal	II	LFY
31	0.5	VT / GY	6386	-	II	KL9+LFY
32 - 38	-	-	-	Not Occupied	-	-
39	0.5	BN / GY	4008	Humidity Sensor Signal	II	LFY
40	0.5	YE / BU	4171	Transmission Input Shaft Speed Sensor Circuit 9V Reference	II	LFY+M3V
41 - 43	-	-	-	Not Occupied	-	-
44	0.5	BK / WH	2151	Signal Ground	II	LFY
45	0.5	YE / RD	6031	Brake Vacuum Sensor 5V Reference	II	KL9+LFY
46	0.5	GY	4109	Driver Mode Switch 5V Reference	II	-
47	0.5	BN / RD	2700	A/C Pressure Sensor 5V Reference	II	LFY
48	-	-	-	Not Occupied	-	-
49	0.75	VT / BU	5292	Powertrain Main Relay Fused Supply Voltage 3	II	LFY
50	0.75	VT / BU	5291	Powertrain Main Relay Fused Supply Voltage 2	II	LFY
51	0.5	VT / YE	5985	Accessory Wake-Up Serial Data	II	LFY
52	0.5	RD / WH	140	Battery Positive Voltage	II	LFY
53 - 55	-	-	-	Not Occupied	-	-
56	0.5	YE	4063	Hood Status A Signal	II	KL9+LFY
57 - 59	-	-	-	Not Occupied	-	-
60	0.5	WH / BU	5726	Ignition Mode Switch Mode Control Backup	II	LFY+M3V
61 - 63	-	-	-	Not Occupied	-	-
64	0.5	BU / GY	636	Ambient Air Temperature Sensor Signal	II	LFY
65	0.5	YE / VT	6030	Brake Vacuum Sensor Signal	II	KL9+LFY
66	0.5	WH / VT	4108	Driver Mode Switch Signal	II	-
67	0.5	GN	380	A/C Refrigerant Pressure Sensor Signal	II	LFY
68	-	-	-	Not Occupied	-	-
69	0.5	GN / GY	465	Fuel Pump Primary Relay Control	II	LFY
70	0.5	YE / VT	4325	Starter Pinion Solenoid Actuator Relay Control	II	KL9+LFY
71	0.5	VT / GY	139	Run/Crank Ignition 1 Voltage	II	LFY
72	0.5	VT / BU	5705	Powertrain Main Relay Control	II	LFY
73	2	VT / BU	5290	Powertrain Main Relay Fused Supply Voltage 1	I	LFY