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