| Table 1: | PCM 80-Way Blue Connector C1 Details |
| Table 2: | PCM 80-Way Blue Connector C2 Details |
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Connector Part Information | ||||||
Pin | Wire Color | Circuit No. | Function | Component Connector Cavity | DTC(s) Affected | Possible Symptoms From a Faulty Circuit |
1 | -- | -- | -- | -- | -- | -- |
2 | -- | -- | -- | -- | -- | -- |
3 | -- | -- | -- | -- | -- | -- |
4 | Lt Blu/Blk | 647 | 24X CKP Reference Signal | Crankshaft Position Sensor Connector B | P0336 | Intermittent fault will cause engine miss/cut-out |
5 | Blk | 630 | Camshaft Position Sensor Signal | Camshaft Position Sensor Connector A | P0341 | Intermittent fault will cause engine miss/cut-out |
6 | Yel | 400 | VSS High | VSS B | P0502 | Speedometer inoperative, late/harsh shifting, chuggle |
7 | Red/Blk | 1230 | Turbine Input Speed Sensor High (Chevrolet) | Transaxle Connector S | -- | Refer to 4T65-E Transaxle Diagnosis |
8 | Dk Grn/Wht | 465 | Fuel Pump Relay Control | Fuel Pump Relay 85 | None | Stall/no start |
9 | Lt Blu/Wht | 1747 | IAC Coil A High | IAC C | P0506, P0507 | High or low idle, stalling |
10 | Lt Grn/Blk | 444 | IAC Coil B Low | IAC B | P0506, P0507 | High or low idle, stalling |
11 | Lt Blu/Blk | 1748 | IAC Coil A Low | IAC D | P0506, P0507 | High or low idle, stalling |
12 | Lt Grn/Wht | 1749 | IAC Coil B High | IAC A | P0506, P0507 | High or low idle, stalling |
13 | Dk Grn | 389 | VSS Output | SMCC II Cruise Contro Moduel K | None | Speedometer inoperative, Cruise Control inoperative |
14 | -- | -- | -- | -- | -- | -- |
15 | Tan | 800 | Serial Data (UART) | DLC 9 | -- | -- |
16 | Gry | 416 | 5 Volt Reference A | TP Sensor A, MAP Sensor C, and EGR Valve D | P1635, P0101, P0122, P1107, P1122, P1406 | Late shifting, incorrect/rough idle, stalling, surging |
17 | Gry | 474 | 5 Volt Reference B | A/C Refrigerant Pressure Sensor B | P1639, P0530 | A/C compressor inoperative |
18 | Red/Wht | 812 | Crankshaft/Camshaft Position Sensors Battery Positive Voltage (B+) | CKP Sensor A, CMP Sensor C | -- | Tachometer Inoperative (Chevrolet) |
19 | Pnk | 339 | Ignition Positive Voltage | Refer to Fuse Block Details | P0560 | No start |
20 | Orn | 540 | Battery Positive Voltage (B+) | Refer to Fuse Block Details | P0560 | No start |
21 |
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| Refer to Engine Controls Components | None | Intermittent symptoms |
22 | Brn | 418 | TCC PWM Solenoid Valve Control | Transmission Connector C | P1860 | Incorrect/Rough Idle, Cuts-out/Misses |
23 | -- | -- | -- | -- | -- | -- |
24 | -- | -- | -- | -- | -- | -- |
25 | Brn/Wht | 419 | MIL Control | Instrument Panel | P1641 | No MIL, MIL ON Steady |
26 | -- | -- | -- | -- | -- | -- |
27 | -- | -- | -- | -- | -- | -- |
28 | Tan/Blk | 422 | TCC Enable Solenoid Valve Control | Transmission Connector D | P1864 | Refer to 4T60-E Transmission Diagnosis |
29 | Gry | 435 | EGR Valve Control | EGR Valve A | P1406, P1635 | Incorrect/rough idle, lack of power, chuggle |
30 | Dk Grn/Wht | 428 | EVAP Canister Purge Vavle Driver | EVAP Canister Purge Solenoid A | P1655, P0441, P1441 | Rough idle |
31 | Dk Blu/Wht | 473 | Coolant Fan 2 Relay Control (High Speed Fan) | High Speed Fan Relay C10 | P1652 | Pusher Fan inoperative, Pusher Fan ON all the time, incorrect idle, possible overheating condition |
32 | Dk Grn | 335 | Coolant Fan 1 Relay Control (Low Speed Fan) | Low Speed Fan Relay C6 | P1651 | Puller Fan inoperative, Puller Fan ON all the time, incorrect idle, possible overheating condition |
33 | -- | -- | -- | -- | -- | -- |
34 | -- | -- | -- | -- | -- | -- |
35 | Dk Grn/Wht | 459 | A/C Compressor Clutch Relay Control | A/C Compressor Relay E6 | P1654 | Incorrect/rough idle A/C compressor inoperative |
36 | -- | -- | -- | -- | -- | -- |
37 | -- | -- | -- | -- | -- | -- |
38 | -- | -- | -- | -- | -- | -- |
39 | -- | -- | -- | -- | -- | -- |
40 | -- | -- | -- | -- | -- | -- |
41 | -- | -- | -- | -- | -- | -- |
42 | -- | -- | -- | -- | -- | -- |
43 | -- | -- | -- | -- | -- | -- |
44 | Ppl/wht | 430 | 3X Reference | ICM E | P1374 | Stalls, sets DTC on restart |
45 | Red/Blk | 453 | Reference Low | ICM F | Intermittent Symptoms | |
46 | Dk Blu/Wht | 1231 | Turbine Input Speed Sensor Low (Chevrolet) | Transaxle Connector V | -- | Refer to 4T65-E Transaxle Diagnosis |
47 | Ppl | 401 | VSS Low | VSS / TOSS A | P0502 | Speedometer inoperative, late/harsh shifting, chuggle |
48 | -- | -- | -- | -- | -- | -- |
49 | -- | -- | -- | -- | -- | -- |
50 | -- | -- | -- | -- | -- | -- |
51 | -- | -- | -- | -- | -- | -- |
52 | Tan/Blk | 424 | Bypass Control | ICM A | P1361 | Incorrect/rough idle, lack of power |
53 | Wht | 423 | Ignition Control (IC) | ICM B | P1350, P1361 | Incorrect/rough idle, lack of power |
54 | Yel | 492 | MAF Sensor Signal | MAF Sensor A | P0101, P0102, P0103 | Reduced performance |
55 | Dk Blu | 229 | Theft Deterrent Fuel Enable Signal | Theft Deterrent Module A3 | P1626, P1629 | Possible No Start |
56 | Blk | 808 | Sensor Ground | ECT Sensor A, TP Sensor B, MAP Sensor A, IAT Sensor A, A/C Refrigerant Pressure Sensor A, EGR Valve B, Transaxle Connector G Fuel Level Sensor F | P0108, P0118, P0123, P0530, P0713, P1106, P1115, P1121, P1406 | Incorrect/rough idle, lack of power late/harsh shifting, chuggle, A/C compressor inoperative |
57 | Blk | 407 | Crankshaft/Camshaft Position Sensors Ground | CKP Sensor C, CMP Sensor B | -- | Tachometer Inoperative (Chevrolet) |
58 | -- | -- | -- | -- | -- | -- |
59 | Ppl | 1807 | Class 2 Data | DLC 2 | None | No scan tool data |
60 | Blk/Wht | 451 | PCM Ground | Refer to Engine Controls Components | None | Intermittent symptoms |
61 | -- | -- | -- | -- | -- | -- |
62 | Lt Grn/Wht | 66 | A/C Request Signal | A/C Control Head | P0530 | A/C Compressor inoperative |
63 | -- | -- | -- | -- | -- | -- |
64 | -- | -- | -- | -- | -- | -- |
65 | -- | -- | -- | -- | -- | -- |
66 | Ppl | 1986 | EVAP Vacuum Switch Signal | EVAP Canister Purge Vacuum Switch B | P1441 | -- |
67 | Ppl | 420 | TCC Brake Switch | TCC Brake Switch (Normally Closed) D | -- | Refer to 4T60-E Transmission Diagnosis |
68 | Pnk | 839 | EGR Valve Ignition Positive Voltage | Refer to Fuse Block Details in Electrical Diagnosis | P0401, P1406, P0133, P0135, P0141, P0147, P0153, P0155 | Fuse blown, EGR Pintle Position error on scan tool varies excessively |
69 | Blk/Wht | 771 | Trans Range Switch Input A | Trans Range Switch D | P0705, P0706 | -- |
70 | Brn | 1174 | Low Oil Level Indicator Input | Low Oil Level Switch A | -- | -- |
71 | -- | -- | -- | -- | -- | -- |
72 | Wht | 776 | Trans Range Switch Input P | Trans Range Switch A | P0705, P0706 | -- |
73 | -- | -- | -- | -- | -- | -- |
74 | -- | -- | -- | -- | -- | -- |
75 | Wht | 85 | Cruise Engaged Input | SMCC II Cruise Control Module J | P1554 | -- |
76 | -- | -- | -- | -- | -- | -- |
77 | -- | -- | -- | -- | -- | -- |
78 | -- | -- | -- | -- | -- | -- |
79 | -- | -- | -- | -- | -- | -- |
80 | -- | -- | -- | -- | -- | -- |
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|---|---|---|---|---|---|---|
Connector Part Information | ||||||
Pin | Wire Color | Circuit No. | Function | Component Connector Cavity | DTC(s) Affected | Possible Symptoms From a Faulty Circuit |
1 | -- | -- | -- | -- | -- | -- |
2 | -- | -- | -- | -- | -- | -- |
3 | -- | -- | -- | -- | -- | -- |
4 | -- | -- | -- | -- | -- | -- |
5 | Orn | 55 | Fuel Gauge Control (Chevrolet) | Instrument Panel | -- | Fuel Gauge Inoperative |
6 | -- | -- | -- | -- | -- | -- |
7 | Brn/Wht | 1173 | Low Oil Level Indicator Control | Instrument Panel * | DTC P1672 | Low Oil Lamp ON all the time, Low OIl Lamp Never ON |
8 | Gry | 803 | Change Oil Soon Indicator Control (Chevrolet) | Instrument Panel | -- | -- |
9 | -- | -- | -- | -- | -- | -- |
10 | -- | -- | -- | -- | -- | -- |
11 | Lt Grn | 1222 | 1-2 Shift Solenoid Valve Control | Transmission Connector A | P0753 | Refer to 4T60-E Transmission Diagnosis |
12 | Lt Grn | 432 | Manifold Absolute Pressure Sensor Signal | MAP Sensor B | P0107, P0108, P1106, P1107 | Default Manifold Absolute Pressure and BARO |
13 | Dk Grn | 83 | Cruise Disable Output | SMCC II Cruise Control Module H | P1662 | -- |
14 | -- | -- | -- | -- | -- | -- |
15 | -- | -- | -- | -- | -- | -- |
16 | Brn | 25 | Charge Warning Indicator Control | Instrument Panel * | 1663 | No Generator Light/Blown Fuse, Generator Light on Steady |
17 | Yel/Blk | 1223 | 2-3 Shift Solenoid Valve Control | Transmission Connector B | P0758 | Refer to 4T60-E Transmission Diagnosis |
18 | -- | -- | -- | -- | -- | -- |
19 | -- | -- | -- | -- | -- | -- |
20 | Lt Blu/Wht | 1229 | Pressure Control Solenoid Valve Low (Chevrolet) | Transaxle Connector D | P0748 | Refer to 4T65-E Transaxle Diagnosis |
21 | Blk/Wht | 451 | PCM Ground | Lower Transaxle Stud | None | Intermittent Symptoms |
22 | Lt Blu/Blk | 844 | Fuel Injector 4 Driver | Injector Connector B | P1200, P0300 | Incorrect/Rough Idle, Missing, Flashing MIL |
23 | Yel | 772 | Trans Range Switch Input B | Trans Range Switch B | P0705, P0706 | -- |
24 | Blk/Wht | 845 | Fuel Injector 5 Driver | Injector ConnectorB | P1200, P0300 | Incorrect/Rough Idle, Missing, Flashing MIL |
25 | Gry | 773 | Trans Range Switch Input C | Trans Range Switch C | P0705, P0706 | -- |
26 | Yel/Blk | 846 | Fuel Injector 6 Driver | Injector Connector B | P1200, P0300 | Incorrect/Rough Idle, Missing, Flashing MIL |
27 | Pnk | 1224 | Pressure Manual Valve Position Switch Input A | Transaxle Connector N | -- | Refer to 4T65-E Transaxle Diagnosis |
28 | Blk | 1744 | Fuel Injector 1 Driver | Injector Connector B | P1200, P0300 | Incorrect/Rough Idle, Missing, Flashing MIL |
29 | Dk Blu | 1225 | Pressure Manual Valve Position Switch Input B | Transaxle Connector R | -- | Refer to 4T65-E Transaxle Diagnosis |
30 | Lt Grn/Blk | 1745 | Fuel Injector 2 Driver | Injector Connector B | P1200, P0300 | Incorrect/Rough Idle, Missing, Flashing MIL |
31 | Red | 1226 | Pressure Manual Valve Position Switch Input C | Transaxle Connector P | -- | Refer to 4T65-E Transaxle Diagnosis |
32 | Pnk/Blk | 1746 | Fuel Injector 3 Driver | Injector Connector B | P1200, P0300 | Incorrect/Rough Idle, Missing, Flashing MIL |
33 | -- | -- | -- | -- | -- | -- |
34 | -- | -- | -- | -- | -- | -- |
35 | Red | 225 | Generator L Terminal Output | Generator B | P0560 | Charging system inoperative, Generator lamp commanded ON |
36 | -- | -- | -- | -- | -- | -- |
37 | -- | -- | -- | -- | -- | -- |
38 | -- | -- | -- | -- | -- | -- |
39 | -- | -- | -- | -- | -- | -- |
40 | -- | -- | -- | -- | -- | -- |
41 | -- | -- | -- | -- | -- | -- |
42 | -- | -- | -- | -- | -- | -- |
43 | -- | -- | -- | -- | -- | -- |
44 | -- | -- | -- | -- | -- | -- |
45 | Ppl | 412 | HO2S 1 Signal | HO2S 1 Connector B | P0131, P0132, P0133, P0134 | Open Loop Fuel Control |
46 | Tan | 413 | HO2S 1 Low | HO2S 1 ConnectorA | P0134 | Open Loop Fuel Control |
47 | Ppl/Wht | 1668 | HO2S 2 Signal | HO2S 2 Connector B | P0137, P0138, P0140 | -- |
48 | Tan/Wht | 1669 | HO2S 2 Low | HO2S 2 A | P0140 | -- |
49 | -- | -- | -- | -- | -- | -- |
50 | -- | -- | -- | -- | -- | -- |
51 | Tan | 472 | Intake Air Temperature Sensor Signal | IAT Sensor B | P0112, P0113, P1111, P1112 | -- |
52 | Yel | 410 | Engine Coolant Temperature Sensor Signal | ECT Sensor B | P0117, P0118, P1114, P1115 | Hard Start, Incorrect/Rough Idle, Cooling Fans Commanded On |
53 | Dk Blu | 417 | Throttle Position Sensor Signal | TP Sensor C | P0122, P0123, P1121, P1122 | Late/Harsh Shifting, TPS Default |
54 | -- | -- | -- | -- | -- | -- |
55 | -- | -- | -- | -- | -- | -- |
56 | -- | -- | -- | -- | -- | -- |
57 | -- | -- | -- | -- | -- | -- |
58 | -- | -- | -- | -- | -- | -- |
59 | -- | -- | -- | -- | -- | -- |
60 |
|
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| Refer to Engine Controls Components | None | Intermittent symptoms |
61 | Red/Blk | 1228 | Pressure Control Solenoid Valve High (Chevrolet) | Transaxle Connector A | P0748 | Refer to 4T65-E Transaxle Diagnosis |
62 | -- | -- | -- | -- | -- | -- |
63 | Dk Blu | 496 | Bank 1 Knock Sensor | Bank 1 Knock Sensor | P0327 | Default Knock Retard commanded |
64 | Lt Blu | 1876 | Bank 2 Knock Sensor | Bank 2 Knock Sensor | P0327 | Default Knock Retard Commanded |
65 | Brn | 1456 | EGR Pintle Position Signal | EGR Valve C | P1406 | Incorrect/Rough Idle, Cuts-out/Misses, Chuggles |
66 | -- | -- | -- | -- | -- | -- |
67 | -- | -- | -- | -- | -- | -- |
68 | -- | -- | -- | -- | -- | -- |
69 | -- | -- | -- | -- | -- | -- |
70 | -- | -- | -- | -- | -- | -- |
71 | Yel/Blk | 1227 | Transaxle Fluid Temperature Sensor Signal |
| P0712, P0713 |
|
72 | -- | -- | -- | -- | -- | -- |
73 | Red/Blk | 380 | A/C Refrigerant Pressure Sensor Signal | A/C Refrigerant Pressure Sensor C | P0530 | A/C Compressor Inoperative |
74 | Ppl | 30 | Fuel Level Sensor Input | Fuel Pump and Sender Connector B (Cheverolet) | -- | Refer to Electrical Diagnosis |
75 | Yel | 657 | TCC Release Switch Input | Transaxle Connector U | -- | Refer to 4T65-E Transaxle Diagnosis |
76 | -- | -- | -- | -- | -- | -- |
77 | -- | -- | -- | -- | -- | -- |
78 | -- | -- | -- | -- | -- | -- |
79 | -- | -- | -- | -- | -- | -- |
80 | -- | -- | -- | -- | -- | -- |
