Engine Control Module (ECM) Connector End Views

Engine Control Module (ECM) C1 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15336786 28 Way F Bosch (BK)
Pin	Wire Color	Circuit No.	Function
1	-	-	Not Used
2	GY	705	5 Volt Reference
3	D-GN	890	Fuel Tank Pressure Sensor Signal
4	PU	420	Stop Lamp Switch Signal
5	GY	1884	Cruise Control Set/Coast and Resume/Accelerate Switch Signal (K34)
6	-	-	Not Used
7	PU	1589	Fuel Level Sensor Signal
8	BN	4	Accessory Voltage
9	-	-	Not Used
10	BK	2759	Low Reference
11	L-BU	20	Stop Lamp Switch Signal
12	PU	1807	ECM Class 2 Serial Data
13	TN/WH	2500	High Speed GM LAN Serial Data Bus (+)
14-15	-	-	Not Used
16	BN/WH	419	MIL Control
17	WH	1310	EVAP Canister Vent Solenoid Control
18	PU	1807	ECM Class 2 Serial Data (JM4)
19	TN	2501	High Speed GM LAN Serial Data Bus (-)
20	-	-	Not Used
21	D-GN/WH	459	A/C Compressor Clutch Relay Control (C60)
22	OG	480	Battery Positive Voltage
23	PK	639	Ignition 1 Voltage
24	-	-	Not Used
25	D-GN/WH	465	Fuel Pump Relay Control
26	L-GN	1887	Cruise Control Servo Move Direction Signal (K34)
27	L-BU	1888	Cruise Control Servo Clutch Control (K34)
28	PK	1886	Cruise Control Servo Move Signal (K34)

Engine Control Module (ECM) C2 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15336796 80 Way F 101/ Bosch (BK)
Pin	Wire Color	Circuit No.	Function
1	TN	2501	High Speed GM LAN Serial Data Bus (-)
2	-	-	Not Used
3	L-GN	432	MAP Sensor Signal
4	D-BU	417	TP Sensor Signal
5	-	-	Not Used
6	RD/BK	380	A/C Refrigerant Pressure Sensor Signal (C60)
7	YE	410	ECT Sensor Signal
8	-	-	Not Used
9	PU	574	Low Reference
10	YE	573	CKP Sensor Signal
11	D-BU	496	Knock Sensor Signal
12	PU	1666	HO2S High Signal Sensor 1
13	PU/WH	1668	HO2S High Signal Sensor 2
14-16	-	-	Not Used
17	BN/WH	633	CMP Sensor Signal
18-21	-	-	Not Used
22	TN/WH	2500	High Speed GM LAN Serial Data Bus (+)
23	-	-	Not Used
24	OG/BK	469	Low Reference
25	BK	2752	Low Reference
26	-	-	Not Used
27	BK	2751	Low Reference (C60)
28	BK	2761	Low Reference
29-30	-	-	Not Used
31	GY	1716	Low Reference
32	-	-	Not Used
33	TN	1667	HO2S Low Signal Sensor 1
34	TN/WH	1669	HO2S Low Signal Sensor 2
35-36	-	-	Not Used
37	TN/BK	231	Oil Pressure Switch Signal
38	GY	23	Generator Field Duty Cycle Signal
39-42	-	-	Not Used
43	GY	2704	5 Volt Reference
44	GY	2701	5 Volt Reference
45	-	-	Not Used
46	GY	2700	5 Volt Reference (C60)
47	TN	472	IAT Sensor Signal
48	D-GN	1433	PNP/Clutch Start Switch Signal
49	-	-	Not Used
50	PU	401	VSS Signal Low (M86)
51	-	-	Not Used
52	L-BU/BK	1748	IAC Coil A Low Control
53-54	-	-	Not Used
55	BK/WH	1423	HO2S Heater Low Control Sensor 2
56	BK	1744	Fuel Injector 1 Control
57	L-GN/BK	1745	Fuel Injector 2 Control
58-60	-	-	Not Used
61	WH	423	IC Timing Control
62	RD	225	Generator Turn On Signal
63	OG	406	IC Timing Control
64-65	-	-	Not Used
66	YE	447	Starter Relay Coil Control
67	D-GN	335	Cooling Fan Relay Control
68	-	-	Not Used
69	BK	2760	Low Reference
70	YE	400	VSS Signal High (M86)
71	L-GN/WH	1749	IAC Coil B High Control
72	L-GN/BK	444	IAC Coil B Low Control
73	L-BU/WH	1747	IAC Coil A High Control
74	-	-	Not Used
75	D-GN	676	HO2S Heater High Control Sensor 1
76	D-GN/WH	428	EVAP Canister Purge Solenoid Control
77	PK/BK	1746	Fuel Injector 3 Control
78	L-BU/BK	844	Fuel Injector 4 Control
79	BK/WH	451	Ground
80	BK/WH	451	Ground