Engine Control Module Connector End Views. Cadillac CTS 2007

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2007 🢒 CTS 🢒 Brakes 🢒 Antilock Brake System 🢒 Engine Control Module Connector End Views

Connector 1:	Engine Control Module (ECM) - C1
Connector 2:	Engine Control Module (ECM) - C2
Connector 3:	Engine Control Module (ECM) - C3

Engine Control Module (ECM) - C1

Connector Part Information

OEM: 34576-4003
Service: 88988373
Description: 56-Way F (BU) (Encased in BK)

Terminal Part Information

Pins: 11
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit

Pins: 1, 6, 7, 12, 14, 15, 16, 18, 20, 25, 29, 33, 35, 36, 37, 39, 40, 47, 49, 53, 54, 56
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 9, 34, 44, 45, 48, 19, 55
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 9, 34, 44, 45, 48 - J/J
Core/Insulation Crimp: Pins 19, 55 - K/K
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) - C1

Pin	Wire Color	Circuit No.	Function
1	YE	5	Crank Voltage
2-5	--	--	Not Used
6	BN/WH	379	CCP Switch Signal
7	OG	5371	BAS Relay Coil Supply Voltage
8	--	--	Not Used
9	TN	452	Low Reference
10	--	--	Not Used
11-12	--	--	Not Used
13	D-GN/WH	465	Fuel Pump Relay Control
14	--	--	Not Used
15	PU	1807	Class 2 Serial Data (Primary)
16	PU	1807	Class 2 Serial Data (Primary)
17	--	--	Not Used
18	YE	343	Accessory Voltage
19	PK	239	Ignition Voltage
20	RD/WH	1440	Battery Position Voltage
21-24	--	--	Not Used
25	WH	121	Engine Speed Signal
26-28	--	--	Not Used
29	GY	1884	Cruise Control Switch Signal
30-32	--	--	Not Used
33	WH/BK	1164	5-Volt Reference
34	GY	596	5-Volt Reference
35	TN	1274	5-Volt Reference
36	BN	1271	Low Reference
37	PU	1272	Low Reference
38	--	--	Not Used
39	BN	818	Vehicle Speed Signal
40	BN	5069	Main Relay Control
41-43	--	--	Not Used
44	D-BU	1936	Primary Fuel Level Sensor Signal
45	L-BU	1937	Secondary Fuel Level Sensor Signal
46	--	--	Not Used
47	D-BU	1161	APP Sensor 1 Signal
48	D-GN	890	Fuel Tank Pressure Sensor Signal
49	L-BU	1162	APP Sensor 2 Signal
50-52	--	--	Not Used
53	D-GN/WH	459	A/C Compressor Clutch Relay Control
54	D-BU	473	High Speed Cooling Fan Relay Control
55	WH	1310	EVAP Canister Vent Solenoid Control
56	YE	447	Starter Relay Coil Control

Engine Control Module (ECM) - C2

Connector Part Information

OEM: 34566-7103
Service: 88988931
Description: 73-Way F (BK) (Encased in 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)

Pins: 1, 17, 18, 29, 33, 34, 44, 53, 54, 55, 64, 66
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 2, 3, 4, 5, 13, 28, 68, 69, 6, 7, 8, 9, 11, 12, 16, 19, 23, 24, 27, 32, 35, 39, 40, 42, 43, 48, 49, 52, 59, 60, 62, 63, 67, 70, 71, 72
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 2, 3, 4, 5, 13, 28, 68, 69 - K/K
Core/Insulation Crimp: Pins 6, 7, 8, 9, 11, 12, 16, 19, 23, 24, 27, 32, 35, 39, 40, 42, 43, 48, 49, 52, 59, 60, 62, 63, 67, 70, 71, 72 - J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) - C2

Pin	Wire Color	Circuit No.	Function
1	PU	2121	IC 1 Control
2	TN	1664	HO2S Low Signal - Bank 1 Sensor 1
3	PU/WH	1665	HO2S High Signal - Bank 1 Sensor 1
4	PU/WH	1668	HO2S High Signal - Bank 1 Sensor 2
5	TN/WH	1669	HO2S Low Signal - Bank 1 Sensor 2
6	L-BU	1876	Knock Sensor Signal 2
7	TN	407	Knock Sensor Signal 2
8	D-BU	496	Knock Sensor Signal 1
9	GY	1716	Knock Sensor Signal 1
10	--	--	Not Used
11	YE	581	TAC Motor Control - 1
12	BN	582	TAC Motor Control - 2
13	PK/BK	5290	Powertrain Main Relay Fused Supply
14-15	--	--	Not Used
16	L-BU/BK	1746	Fuel Injector 3 Control
17	PU/WH	2128	IC 8 Control
18	D-GN/WH	2124	IC 4 Control
19	BN/WH	2130	Low Reference
20-22	--	--	Not Used
23	PK/BK	632	Low Reference
24	BK	2755	Low Reference
25-26	--	--	Not Used
27	YE/BK	1868	Low Reference
28	PK/BK	5290	Powertrain Main Relay Fused Supply
29	TN/WH	1704	Low Reference
30-31	--	--	Not Used
32	L-GN/BK	1745	Fuel Injector 2 Control
33	OG	2127	IC 7 Control
34	D-GN	2125	IC 5 Control
35	BN	2129	Low Reference
36-38	--	--	Not Used
39	OG	631	5-Volt Reference
40	GY	2705	5-Volt Reference
41	--	--	Not Used
42	TN	552	Low Reference
43	L-GN	1867	5-Volt Reference
44	L-BU/WH	1688	5-Volt Reference
45-47	--	--	Not Used
48	D-BU/WH	878	Fuel Injector 7 Control
49	TN/WH	845	Fuel Injector 5 Control
50-51	--	--	Not Used
52	YE/BK	846	Fuel Injector 6 Control
53	OG/WH	2122	IC 2 Control
54	L-BU/WH	2126	IC 6 Control
55	L-BU	2123	IC 3 Control
56-58	--	--	Not Used
59	BN/WH	633	CMP Sensor
60	TN/WH	331	Oil Pressure Sensor Signal
61	--	--	Not Used
62	TN	472	IAT Sensor Signal
63	D-BU/WH	1869	CKP Sensor Signal
64	D-GN	485	TP Sensor 1 Signal
65	--	--	Not Used
66	PU	486	TP Sensor 2 Signal
67	YE	492	MAF Sensor Signal
68	GY/WH	3113	HO2S Heater Low Control - Bank 1 Sensor 1
69	BN	2391	HO2S Heater Low Control - Bank 1 Sensor 2
70	L-BU/BK	844	Fuel Injector 4 Control
71	OG/BK	877	Fuel Injector 7 Control
72	TN	1744	Fuel Injector 1 Control
73	BK	750	Ground

Engine Control Module (ECM) - C3

Connector Part Information

OEM: 34566-7003
Service: 88988372
Description: 73-Way F (D-GY) (Encased in 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)

Pins: 12, 17, 33, 47, 49, 53
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 3, 4, 5, 6, 15, 50, 7, 8, 13, 18, 21, 23, 29, 35, 36, 37, 39, 48, 55, 56, 57, 59, 66, 67
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 3, 4, 5, 6, 15, 50 - K/K
Core/Insulation Crimp: Pins 7, 8, 13, 18, 21, 23, 29, 35, 36, 37, 39, 48, 55, 56, 57, 59, 66, 67 - J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) - C3

Pin	Wire Color	Circuit No.	Function
1-2	--	--	Not Used
3	TN	1667	HO2S Low Signal - Bank 2 Sensor 1
4	PU	1666	HO2S High Signal - Bank 2 Sensor 1
5	PU	1670	HO2S High Signal - Bank 2 Sensor 2
6	TN	1671	HO2S Low Signal - Bank 2 Sensor 2
7	OG	225	Generator Turn On Signal
8	L-GN	1652	Reverse Lockout Solenoid Control
9-11	--	--	Not Used
12	TN/BK	464	Delivered Torque Signal
13	GY	587	Skip/Shift Solenoid Control
14	--	--	Not Used
15	L-GN	3212	HO2S Heater Low Control - Bank 2 Sensor 1
16	--	--	Not Used
17	OG/BK	463	Requested Torque Signal
18	BN	1174	Oil Level Switch Signal
19-20	--	--	Not Used
21	TN	5514	Low Reference
22	--	--	Not Used
23	OG/BK	469	Low Reference
24-28	--	--	Not Used
29	GY	23	Generator Field Duty Cycle Signal
30-32	--	--	Not Used
33	TN	2501	High Speed GMLAN Serial Data Bus -
34	--	--	Not Used
35	TN	2761	Low Reference
36	OG/BK	1057	Low Reference
37	GY	2700	5-Volt Reference
38	--	--	Not Used
39	GY	2704	5-Volt Reference
40-46	--	--	Not Used
47	PU/WH	1035	Starter Relay Coil Supply Voltage
48	D-GN/WH	428	EVAP Canister Purge Solenoid Control
49	D-GN	335	Low Speed Cooling Fan Relay Control
50	OG/WH	3223	HO2S Heater Low Control (Bank 2 Sensor 2)
51-52	--	--	Not Used
53	TN/BK	2500	High Speed GMLAN Serial Data Bus +
54	--	--	Not Used
55	YE	410	ECT Sensor Signal
56	YE/BK	1227	TFT Sensor Signal
57	OG/BK	380	A/C Refrigerant Pressure Sensor Signal
58	--	--	Not Used
59	L-GN	432	MAP Sensor Signal
60-65	--	--	Not Used
66	PU/WH	821	VSS High Signal
67	L-GN/BK	822	VSS Low Signal
68-72	--	--	Not Used
73	BK	750	Ground