Engine Control Module Connector End Views. Chevrolet HHR 2007

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2007 🢒 HHR 🢒 Engine 🢒 Engine Cooling 🢒 Engine Control Module Connector End Views

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

Engine Control Module (ECM) C1

Connector Part Information

OEM: 34566-8203
Service: 88988931
Description: 73-Way F MX 123 Series (BK)

Terminal Part Information

Pins: 73
Terminal/Tray: 7116-4151-02/9
Core/Insulation Crimp: E/1
Release Tool/Test Probe: 12094430/J-35616-4A (PU)

Pins: 1, 3-6, 13, 18, 21, 24, 25, 27, 30, 31, 34, 36, 37, 39, 41-44, 47, 54-56, 58, 66, 67
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 19, 20, 70
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) C1

Pin	Wire Color	Circuit No.	Function
1	D-BU	1161	APP Sensor 1 Signal
2	--	--	Not Used
3	BN	4	Accessory Voltage
4	PU	420	TCC Brake Switch/Cruise Control Release Signal
5	D-GN	335	Low Speed Cooling Fan Relay Control
6	L-GN/WH	465	Fuel Pump Relay Control (- Primary)
7-12	--	--	Not Used
13	BN	5069	Powertrain Relay Control
14-17	--	--	Not Used
18	L-BU	1162	APP Sensor 2 Signal
19	PK/BK	1039	Ignition 1 Voltage
20	RD/WH	840	Battery Positive Voltage
21	PU	1272	Low Reference
22-23	--	--	Not Used
24	TN	2759	Low Reference
25	OG/BK	380	A/C Refrigerant Pressure Sensor Signal
26	--	--	Not Used
27	BN/WH	419	MIL Control
28-29	--	--	Not Used
30	D-GN/WH	459	A/C Compressor Clutch Relay Control
31	YE	447	Starter Relay Coil Control
32-33	--	--	Not Used
34	PU/WH	6356	VSS Signal Low
35	--	--	Not Used
36	BN/WH	379	Cruise Control Clutch Pedal Position Switch Signal (M86)
37	YE	492	Mass Air Flow Sensor Signal
38	--	--	Not Used
39	PU	1589	Fuel Level Sensor Signal (+ Primary)
40	--	--	Not Used
41	BN	1271	Low Reference
42	D-GN	890	Fuel Tank Pressure Sensor Signal
43	TN/BK	2500	High Speed GMLAN Serial Data (+) (1)
44	TN	2501	High Speed GMLAN Serial Data (-) (1)
45-46	--	--	Not Used
47	WH/BK	1164	5-Volt Reference
48-53	--	--	Not Used
54	BN/WH	6354	VSS Signal High
55	L-BU	20	Stop Lamp Supply Voltage
56	D-GN	1433	PNP/Clutch Start Switch Signal (M86)
57	--	--	Not Used
58	TN	472	Intake Air Temperature Sensor Signal
59-65	--	--	Not Used
66	GY	2709	5-Volt Reference
67	TN	1274	5-Volt Reference
68-69	--	--	Not Used
70	WH	1310	EVAP Canister Vent Solenoid Control
71-72	--	--	Not Used
73	PK/BK	5290	Ignition 1 Voltage

Engine Control Module (ECM) C2

Connector Part Information

OEM: 34566-9403
Service: 88988372
Description: 73-Way F MX123 Series (BK)

Terminal Part Information

Pins: 73
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit

Pins: 4-8, 10, 16, 20, 30, 32, 33, 35, 37, 38, 41, 45, 46, 48, 50, 51, 54, 58, 65, 66, 67, 68
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 9, 13, 22-24, 26, 31, 39, 40, 42, 43, 49, 53, 57, 59
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) C2

Pin	Wire Color	Circuit No.	Function
1-3	--	--	Not Used
4	TN	2761	Low Reference
5	PU	574	Low Reference
6	TN	1744	Fuel Injector (1) Control
7	PK/BK	1746	Fuel Injector (3) Control
8	L-BU/BK	844	Fuel Injector (4) Control
9	BN	2129	Low Reference
10	L-GN/BK	1745	Fuel Injector (2) Control
11-12	--	--	Not Used
13	GY/BK	2704	5-Volt Reference
14-15	--	--	Not Used
16	YE	581	TAC Motor Control (1)
17-19	--	--	Not Used
20	TN	5301	Low Reference
21	--	--	Not Used
22	PU	2121	Ignition Control (1)
23	L-BU	2123	Ignition Control (3)
24	D-GN/WH	2124	Ignition Control (4)
25	--	--	Not Used
26	OG/WH	2122	Ignition Control (2)
27-29	--	--	Not Used
30	D-GN/WH	428	EVAP Canister Purge Solenoid Control
31	OG	225	Generator Turn On Signal
32	BN	582	TAC Motor Control (2)
33	D-BU	5300	5-Volt Reference
34	--	--	Not Used
35	GY	6255	5-Volt Reference
36	--	--	Not Used
37	PU/WH	3110	Heated Oxygen Sensor High Signal Sensor 1
38	PU/WH	1668	Heated Oxygen Sensor High Signal Sensor 2
39	L-GN	432	Manifold Absolute Pressure Sensor Signal
40	TN	2752	Low Reference
41	PU/WH	6256	Low Reference
42	TN	2760	Low Reference
43	GY/WH	23	Generator Field Duty Cycle Signal
44	--	--	Not Used
45	YE	573	Crankshaft Position Sensor Signal
46	OG	5275	CMP Sensor Signal
47	--	--	Not Used
48	TN/WH	3111	Heated Oxygen Sensor Low Signal Sensor 1
49	OG/BK	469	Low Reference
50	GY	1716	Knock Sensor Signal
51	D-BU	496	Knock Sensor Signal
52	--	--	Not Used
53	GY	2701	5-Volt Reference
54	L-GN	2867	5-Volt Reference
55-56	--	--	Not Used
57	D-GN	485	Throttle Position Sensor (1) Signal
58	YE	410	Engine Coolant Temperature Sensor Signal
59	PU	486	Throttle Position Sensor (2) Signal
60-64	--	--	Not Used
65	GY/WH	3113	Heated Oxygen Sensor Heater Low Control Sensor 1
66	GY/WH	1423	Heated Oxygen Sensor Heater Low Control Sensor 2
67	TN/BK	231	Oil Pressure Switch Signal
68	TN/WH	1669	Heated Oxygen Sensor Low Signal Sensor 2
69-72	--	--	Not Used
73	BK/WH	451	Signal Ground