Engine Control Module (ECM) C1

Fig 1: Engine Control Module (ECM) C1 Connector End View

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) C1 Connector Parts Information

Connector Part Information

OEM: 13510837 (Early Production)/13574282 (Late Production)
Service: 88988373
Description: 56-Way F Receptacle 0.64 Series Sealed (BU)/33-Way F Sealed (BU)

Terminal Part Information

Pins: 1-2, 4, 9, 12-13, 16, 18, 20-22, 24-25, 30-37, 39-40, 44, 46-49, 53, 55-56
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 7, 19
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 Connector Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	PU	806	Crank Voltage
2	PU	420	TCC Brake Switch/Cruise Control Release Signal
3	-	-	Not Used (Early Production)
3	-	-	Not Available (Late Production)
4	GY/BK	1694	4WD Low Signal (NP8)
5-6	-	-	Not Used (Early Production)
5-6	-	-	Not Available (Late Production)
7	L-BU	1320	CHMSL Supply Voltage (K34)
8	-	-	Not Used (Early Production)
8	-	-	Not Available (Late Production)
9	BK	2759	Low Reference
10-11	-	-	Not Used (Early Production)
10-11	-	-	Not Available (Late Production)
12	BN/WH	419	MIL Control
13	D-GN/WH	465	Fuel Pump Relay Control
14-15	-	-	Not Used (Early Production)
14-15	-	-	Not Available (Late Production)
16	D-GN	1049	Class 2 Serial Data
17	-	-	Not Used (Early Production)
17	-	-	Not Available (Late Production)
18	PK	1020	Ignition 0 Voltage
19	PK	439	Ignition 1 Voltage
20	OG	240	Battery Positive Voltage
21	GY/BK	87	Cruise Control Resume/Accel Switch Signal (K34)
22	D-BU	84	Cruise Control Set/Coast Switch Signal (K34)
23	-	-	Not Used (Early Production)
23	-	-	Not Available (Late Production)
24	YE/BK	1827	Vehicle Speed Signal
25	WH	121	Engine Speed Signal
26-29	-	-	Not Used (Early Production)
26-29	-	-	Not Available (Late Production)
30	GY	397	Cruise Control On Switch Signal (K34)
31	BK	452	Low Reference
32	GY	416	5-Volt Reference
33	WH/BK	1164	5-Volt Reference
34	GY	2709	5-Volt Reference
35	TN	1274	5-Volt Reference
36	BN	1271	Low Reference
37	PU	1272	Low Reference
38	-	-	Not Used (Early Production)
38	-	-	Not Available (Late Production)
39	D-GN/WH	817	Vehicle Speed Signal
40	YE	5991	Powertrain Relay Coil Control
41-43	-	-	Not Used (Early Production)
41-43	-	-	Not Available (Late Production)
44	PU	1589	Fuel Level Sensor Signal
45	-	-	Not Used (Early Production)
45	-	-	Not Available (Late Production)
46	D-BU	1809	Brake Booster Vacuum Sensor
47	D-BU	1161	APP Sensor 1 Signal
48	D-GN	890	Fuel Tank Pressure Sensor
49	L-BU	1162	App Sensor 2 Signal
50-52	-	-	Not Used (Early Production)
50-52	-	-	Not Available (Late Production)
53	D-GN/WH	459	A/C Compressor Clutch Relay Control
54	-	-	Not Used (Early Production)
54	-	-	Not Available (Late Production)
55	WH	1310	EVAP Canister Vent Solenoid Control
56	YE/BK	625	Starter Enable Relay Control