Engine Control Module Connector End Views. GMC Truck Acadia

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2007 🢒 Acadia - 2WD 🢒 HVAC 🢒 HVAC - Automatic 🢒 Engine Control Module Connector End Views

Connector 1:	Engine Control Module (ECM) X1 (LY7)
Connector 2:	Engine Control Module (ECM) X2 (LY7)
Connector 3:	Engine Control Module (ECM) X3 (LY7)

Engine Control Module (ECM) X1 (LY7)

Connector Part Information

OEM: 34576-3603
Service: See Catalog
Description: 56-Way F MX123 Series, Sealed (BU)

Terminal Part Information

Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) X1 (LY7)

Pin	Wire	Circuit No.	Function
1-6	--	--	Not Used
7	0.5 WH	17	Stop Lamp Supply Voltage
8	--	--	Not Used
9	0.5 TN	452	Low Reference
10-11	--	--	Not Used
12	0.5 BN/WH	419	MIL Control
13	0.5 D-GN/WH	465	Fuel Pump Relay Control
14-17	--	--	Not Used
18	0.5 D-BU	5985	Ignition I/II Voltage
19	0.5 PK	439	Ignition II/III Voltage
20	0.5 RD/WH	540	Battery Positive Voltage
21-25	--	--	Not Used
26	0.5 YE	447	Starter Relay Coil Control
27-32	--	--	Not Used
33	0.5 WH/BK	1164	5-Volt Reference
34	0.5 GY	2709	5-Volt Reference
35	0.5 TN	1274	5-Volt Reference
36	0.5 BN	1271	Low Reference
37	0.5 PU	1272	Low Reference
38-39	--	--	Not Used
40	0.5 YE	5991	Powertrain Relay Coil Control
41-43	--	--	Not Used
44	0.5 PU	1589	Fuel Level Sensor Signal
45-46	--	--	Not Used
47	0.5 D-BU	1161	APP Sensor 1 Signal
48	0.5 D-GN	890	Fuel Tank Pressure Sensor Signal
49	0.5 L-BU	1162	APP Sensor 2 Signal
50-52	--	--	Not Used
53	0.5 D-GN/WH	459	A/C Compressor Clutch Relay Control
54	0.5 D-BU	473	High Speed Cooling Fan Relay Control
55	0.5 WH	1310	EVAP Canister Vent Solenoid Control
56	--	--	Not Used

Engine Control Module (ECM) X2 (LY7)

Connector Part Information

OEM: 34566-5203
Service: See Catalog
Description: 73-Way F MX123 34566 Series, Sealed (BK)

Terminal Part Information

Pins: 73
Terminal/Tray: 7116-4152-02/9
Core/Insulation Crimp: 2/5
Release Tool/Test Probe: 12094430/J-35616-35 (VT)

Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 1-9, 14, 15, 17, 19-24, 27, 29-39, 42-44, 46-54, 56-59, 62-64, 66-69, 71, 72 - J/J
Core/Insulation Crimp: Pins 11-13 - K/K
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) X2 (LY7)

Pin	Wire	Circuit No.	Function
1	0.5 BN/WH	6405	Ignition Coil 1 Control
2	0.5 TN/WH	7349	Low Reference
3	0.5 D-GN	7352	Oxygen Sensor Bank 1 Sensor 1 Signal
4	0.5 OG/D-BU	7357	Oxygen Sensor Bank 1 Sensor 2 Signal
5	0.5 WH/YE	7356	Low Reference
6	0.5 L-BU	1876	Knock Sensor 2 Signal
7	0.5 TN	407	Low Reference
8	0.5 D-BU	496	Knock Sensor 1 Signal
9	0.5 GY	1716	Low Reference
10	--	--	Not Used
11	0.8 YE	581	TAC Motor Control - 1
12	0.8 BN	582	TAC Motor Control - 2
13	0.8 PK/BK	5290	Ignition II/III Voltage
14	0.5 PK/BK	6395	Cam Phaser #2 Control
15	0.5 TN/BK	6397	Cam Phaser #4 Control
16	--	--	Not Used
17	0.5 D-BU/WH	6406	Ignition Coil 2 Control
18	--	--	Not Used
19	0.5 PK	6414	Inside Air Temperature Sensor Signal
20	0.5 PU	6267	Camshaft CAM X Ground
21	0.5 TN	6268	Camshaft CAM Y Ground
22	0.5 WH	6269	Camshaft CAM Z Ground
23	0.5 BN	6266	Camshaft CAM W Ground
24	0.5 BK	2755	Low Reference
25-26	--	--	Not Used
27	0.5 GY/BK	6272	Low Reference
28	--	--	Not Used
29	0.5 TN	2752	Low Reference
30	0.5 BN/WH	6754	Low Reference
31	0.5 D-BU/WH	6756	Low Reference
32	0.5 GY	6418	Fuel Injector 4 Control
33	0.5 D-GN/WH	6407	Ignition Coil 3 Control
34	0.5 PU/WH	6410	Ignition Coil 6 Control
35	0.5 PU	6413	Low Reference
36	0.5 D-GN	6457	Camshaft CAM X Supply Voltage
37	0.5 OG	6260	Camshaft CAM Y Supply Voltage
38	0.5 PK	6261	Camshaft CAM Z Supply Voltage
39	0.5 D-BU	6259	Camshaft CAM W Supply Voltage
40-41	--	--	Not Used
42	0.5 TN	2760	Low Reference
43	0.5 PU/WH	6270	Crankshaft 60X Sensor Voltage
44	0.5 GY	2701	5-Volt Reference
45	--	--	Not Used
46	0.5 BN	6753	Low Reference
47	0.5 D-BU	6755	Low Reference
48	0.5 D-BU	6416	Fuel Injector 2 Control
49	0.5 OG	6420	Fuel Injector 6 Control
50	0.5 WH/BK	6396	Cam Phaser #3 Control
51	0.5 GY/BK	6394	Cam Phaser Control
52	0.5 L-BU	6419	Fuel Injector 5 Control
53	0.5 L-BU/WH	6408	Ignition Coil 4 Control
54	0.5 L-GN/WH	6409	Ignition Coil 5 Control
55	--	--	Not Used
56	0.5 D-GN/WH	6264	Camshaft CAM X Signal
57	0.5 OG/BK	6263	Camshaft CAM Y Signal
58	0.5 PK/BK	6262	Camshaft CAM Z Signal
59	0.5 D-BU/WH	6265	Camshaft CAM W Signal
60-61	--	--	Not Used
62	0.5 TN	472	IAT Sensor Signal
63	0.5 WH/BK	6271	Crankshaft 60X Sensor Signal
64	0.5 D-GN	485	TP Sensor 1 Signal
65	--	--	Not Used
66	0.5 PU	486	TP Sensor 2 Signal
67	0.5 YE	492	MAF Sensor Signal
68	0.5 D-BU	6424	Oxygen Sensor Heated A Signal
69	0.5 OG	6426	Oxygen Sensor Heated C Signal
70	--	--	Not Used
71	0.5 D-GN	6417	Fuel Injector 3 Control
72	0.5 BN	6415	Fuel Injector 1 Control
73	2 BK/WH	451	Ground

Engine Control Module (ECM) X3 (LY7)

Connector Part Information

OEM: 34566-5303
Service: See Catalog
Description: 73-Way F MX123 34566 Series, Sealed (GY)

Terminal Part Information

Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) X3 (LY7)

Pin	Wire	Circuit No.	Function
1-2	--	--	Not Used
3	0.5 TN/BK	7354	Low Reference
4	0.5 PU/WH	7355	Oxygen Sensor Heated B High Reference
5	0.5 YE/BN	7359	Oxygen Sensor Bank 2 Sensor 2 Signal
6	0.5 VT/WH	7358	Low Reference
7	0.5 OG	225	Generator Turn On Signal
8-14	--	--	Not Used
15	0.5 GY	6425	Oxygen Sensor Heated B Signal
16-20	--	--	Not Used
21	0.5 TN	5514	Low Reference
22	--	--	Not Used
23	0.5 OG/BK	469	Low Reference
24-28	--	--	Not Used
29	0.5 GY	23	Generator Field Duty Cycle Signal
30-31	--	--	Not Used
32	0.5 OG	6392	Variable Tuning Control
33	0.5 TN	2501	High Speed GMLAN Serial Data Bus-
34	--	--	Not Used
35	0.5 TN	2761	Low Reference
36	--	--	Not Used
37	0.5 GY	2700	5-Volt Reference
38	--	--	Not Used
39	0.5 GY	2704	5-Volt Reference
40-45	--	--	Not Used
46	0.5 OG/BK	1786	Ignition Lock Cylinder Control Actuator Signal
47	--	--	Not Used
48	0.5 D-GN/WH	428	EVAP Canister Purge Solenoid Control
49	0.5 D-GN	335	Low Speed Cooling Fan Relay Control
50	0.5 PU	6427	Oxygen Sensor Heated D Signal
51-52	--	--	Not Used
53	0.5 TN/BK	2500	High Speed GMLAN Serial Data Bus+
54	--	--	Not Used
55	0.5 YE	410	ECT Sensor Signal
56	--	--	Not Used
57	0.5 OG/BK	380	A/C Refrigerant Pressure Sensor Signal
58	--	--	Not Used
59	0.5 L-GN	432	MAP Sensor Signal
60-63	--	--	Not Used
64	0.5 YE	7017	Variable Intake Manifold Position Signal
65	0.5 TN/BK	231	Oil Pressure Switch Signal
66-73	--	--	Not Used