1999-2002 PCM Pinouts

C1 Connector BLUE

Pin	Wire Color	Function
1	BLK/WHT	PCM Ground
2	LT GRN	Crankshaft Position Sensor B+ Supply
3	PNK/BLK	Injector 3 Control
4	LT GRN/BLK	Injector 2 Control
5	—	Not Used
6	—	Not Used
7	—	Not Used
8	—	Not Used
9	—	Not Used
10	—	Not Used
11	LT BLU	Knock Sensor Signal Rear
12	DK BLU/WHT	Crankshaft Position Sensor Signal
13	ORN/BLK	Requested Torque Signal
14	ORN/BLK	UART Serial Data (drive by wire only)
15	DK BLU/WHT	UART Serial Data (drive by wire only)
16	—	Not Used
17	DK BLU	Transmission Fluid Pressure Switch B
18	RED	Transmission Fluid Pressure Switch C
19	PNK	PCM Ignition Supply
20	ORN	PCM Battery Supply
21	YEL/BLK	Crankshaft Position Sensor Ground
22	—	Not Used
23	PPL	Sensor Ground EGR
24	—	Not Used
25	TAN	HO2S Signal Low B2S2 (w/Case Ground O2 Sensors)
25	TAN	HO2S Signal Low B2S2 (w/Isolated Ground O2 Sensors)
26	TAN	HO2S Signal Low B2S1 (w/Case Ground O2 Sensors)
26	TAN	HO2S Signal Low B2S1 (w/Isolated Ground O2 Sensors)
27	—	Not Used
28	TAN/WHT	HO2S Signal Low B1S2 (w/Case Ground O2 Sensors)
28	TAN	HO2S Signal Low B1S2 (w/Isolated Ground O2 Sensors)
29	TAN/WHT	HO2S Signal Low B1S1 (w/Case Ground O2 Sensors)
29	TAN	HO2S Signal Low B1S1 (w/Isolated Ground O2 Sensors)
30	LT GRN	Engine Coolant Level Switch
31	—	Not Used
32	BLK/WHT	PRND A Input
33	PPL	TCC Brake Switch
34	WHT	PRND P Input
35	GRA	Clutch Switch Signal (manual trans)
36	BLK	Injector 1 Control
37	YEL/BLK	Injector 6 Control
38	PNK/WHT	Damping Lift/Drive Signal
39	—	Not Used
40	BLK/WHT	PCM Ground
41	BLK	Sensor Ground w/Case grounded o2 Sensors
41	GRY	Sensor Ground w/Isolated Ground O2 Sensors
42	—	Fan 1 Relay Control
43	RED/BLK	Injector 7 Control
44	LT BLU/BLK	Injector 4 Control
45	GRA	Fuel Tank Pressure Sensor 5V Reference
46	GRA	TP Sensor 5V Reference
47	GRA	MAP Sensor 5V Reference
48	GRA	EGR Pintle Position Sensor 5V Reference
49-50	—	Not Used
51	DK BLU	Knock Sensor Signal Front
52	—	Not Used
53	BLK	Fuel Tank Pressure Sensor Ground
54	BLK	TP Sensor Ground
55	BRN	EGR Pintle Position Sensor Signal
56	WHT	Fuel Temp/Composition Signal (L59 Flex Fuel)
57	ORN	PCM Battery Supply
58	DK GRN	Serial Data to OBD2 Port
59	YEL	Serial Data to BCM
60	ORN/BLK	MAP Sensor Ground
61	PNK/BLK	CMP Sensor Ground
62	—	Not Used
63	GRY	Sensor Ground (ETC) w/case grounded o2 sensors
63	TAN	Sensor Ground (HO2S Low Signal) w/isolated grounded o2 sensors
64	—	Not Used
65	PPL	HO2S Signal High Bank 2 Sensor 2
66	PPL	HO2S Signal High Bank 2 Sensor 1
67	—	Not Used
68	PPL/WHT	HO2S Signal High Bank 1 Sensor 2
69	PPL/WHT	HO2S Signal High Bank 1 Sensor 1
70	BRN	Low Oil Level Switch
71	—	Tow/Haul Mode Switch
72	YEL	PRND B Input
73	BRN/WHT	Camshaft Position (CMP) Sensor Signal
74	YEL	Engine Coolant Temperature (ECT) Sensor Signal
75	PNK	PCM Ignition Supply
76	BLK/WHT	Injector 5 Control
77	DK BLU/WHT	Injector 8 Control
78	—	Not Used
79	WHT	3-2 Shift Solenoid Control
80	ORN/BLK	Fuel Level Sensor Ground

C1 Connector BLUE

Pin	Wire Color	Function
1	BLK/WHT	PCM Ground
2	BRN	TCC Control Solenoid
3	TAN	Fuel Pump Relay Control – Secondary
4	—	Not Used
5	TAN/BLK	Delivered Torque Signal
6	RED/BLK	Transmission Fluid Pressure Control Solenoid High
7	RED	EGR Solenoid Supply
8	LT BLU/WHT	Transmission Fluid Pressure Control Solenoid Low
9	DK GRN/WHT	Fuel Pump Relay Control
10	WHT	Engine Speed (Tach) Output Signal
11	DK BLU	A/C High Pressure Recirculation Switch
12	—	Not Used
13	LT BLU/BLK	Cruise Control Engage Signal
14	—	Not Used
15	BRN	Generator L Terminal (Alternator turn on signal)
16	GRA/BLK	4 Wheel Drive Switch Signal Low
17	DK GRN/WHT	A/C Request Signal
18	—	Not Used
19	BLK/WHT	4 Wheel Drive Front Axle Switch
20	LT GRN/BLK	Vehicle Speed Sensor (VSS) Reference Low
21	PPL/WHT	Vehicle Speed Sensor (VSS) Signal
22	RED/BLK	Vehicle Speed Sensor (VSS) Signal (4L80E Only)
23	DK BLU/WHT	Vehicle Speed Sensor (VSS) Reference Low (4L80E Only)
24	DK BLU	TP Sensor Signal
25	TAN	IAT Sensor Signal
26	PPL	Ignition Control 1
27	RED	Ignition Control 7
28	LT BLU/WHT	Ignition Control 6
29	DK GRN/WHT	Ignition Control 4
30	—	Not Used
31	YEL	MAF Sensor Signal
32	LT GRN	MAP Sensor Signal
33	DK GRN	Fan 2 Relay Control
34	DK GRN/WHT	EVAP Canister Purge Solenoid Control
35	—	Not Used
36	BRN	AIR Pump Relay Control
37	—	Not Used
38	—	Not Used
39	RED	CMP Sensor B+ Supply
40	BLK/WHT	PCM Ground
41	WHT	EGR Solenoid Ground
42	TAN/BLK	TCC Enable Circuit (4L60-E only)
43	DK GRN/WHT	A/C Clutch Relay Control
44	—	Not Used
45	WHT	EVAP Canister Vent Valve Control
46	BRN/WHT	Malfunction Indicator Lamp (MIL) Control
47	YEL/BLK	Transmission Shift Solenoid B
48	LT GRN	Transmission Shift Solenoid A
49	YEL/BLK	Vehicle Speed Output Circuit 128K
50	DK GRN/WHT	Vehicle Speed Output Circuit 4K
51	YEL/BLK	Transmission Temperature Sensor Signal
52	GRY	Generator Field Duty Cycle Signal
53	—	Not Used
54	PPL	Fuel Level Sensor Signal
55	DK GRN	A/C Low Pressure Switch Signal
56	—	Not Used
57	BLK	IAT Sensor Ground
58	—	Not Used
59	—	Not Used
60	BRN	Ignition Control Reference Low Bank 1
61	BRN/WHT	Ignition Control Reference Low Bank 2
62	GRA	PRND C
63	PNK	Transmission Fluid Pressure Switch A
64	DK GRN	Fuel Tank Pressure Sensor Signal
65	—	Not Used
66	PPL/WHT	Ignition Control 8
67	RED/WHT	Ignition Control 2
68	DK GRN	Ignition Control 5
69	LT BLU	Ignition Control 3
70	—	Not Used
71	—	Not Used –
72	—	Not Used
73	DK BLU	Fuel Level Sensor Signal – Secondary
74	LT GRN/WHT	HO2S Heater Control
75	—	Not Used
76	LT GRN/WHT	IAC Coil B High
77	LT GRN/BLK	IAC Coil B Low
78	LT BLU/BLK	IAC Coil A Low
79	LT BLU/WHT	IAC Coil A High
80	LT GRN	HO2S Heater Low Reference