For 1990-2009 cars

#### PCM 80-Way Blue Connector C1 Details

Connector Part Information | Blue PCM Connector C1

• | Body - 12160549

• | TPA - 12160569

• | Terminals - 12084913

• | Shield - 12160921

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 | 18X Reference | ICM C | P0336 | Intermittent fault will cause the engine to misfire or cut-out
5 | Blk | 630 | Camshaft Position PCM Input | ICM F | P0341 | Intermittent fault will cause the engine to misfire or cut-out
6 | Yel | 400 | VSS High | VSS B | P0502 | Speedometer inoperative Chuggle Late/harsh shifting
7 | Red/Blk | 1230 | Transaxle Input Speed Sensor High | 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 A High | IAC C | P0506 P0507 | High or low idle Stalling
10 | Lt Grn/Blk | 444 | IAC B Low | IAC B | P0506 P0507 | High or low idle Stalling
11 | Lt Blu/Blk | 1748 | IAC A Low | IAC D | P0506 P0507 | High or low idle Stalling
12 | Lt Grn/Wht | 1749 | IAC B High | IAC A | P0506 P0507 | High or low idle Stalling
13 | Dk Grn/Wht | 817 | 4K/Mi Speed | Instrument Panel* SMCC II Cruise Control Module K | None | Speedometer inoperative Cruise control inoperative
14 | Orn/Blk | 463 | Traction Control Desired Torque (With Traction Control System RPO NW9 Only) | EBTCM 1 | P1571 | Traction control disabled Traction Off lamp illuminated
15 | Tan | 800 | Serial Data | DLC 9 | -- | --
16 | Gry | 416 | 5 Volt Reference A | TP Sensor C MAP Sensor C Fuel Tank Pressure Sensor C EGR Valve D | P0101 P0122 P1107 P1122 P1406

P1635

Late shifting

, Incorrect/rough idle

Stalling

Surging

17 | Gry | 474 | 5 Volt Reference B | A/C Refrigerant Pressure Sensor B | P0530 P1639 | A/C compressor inoperative
18 | -- | -- | -- | -- | -- | --
19 | Pnk | 439 | Ignition Positive Voltage | Refer to Fuse Block Details in Electrical Diagnosis | -- | No start
20 | Red | 1642 | Battery Positive Voltage | Fuse Block Details in Electrical Diagnosis | -- | No start
21 | Blk/Wht | 451 | PCM Ground | Engine block below cyl #2 spark plug | None | Intermittent symptoms
22 | Brn | 418 | TCC PWM Solenoid Control (4T60-E) | Transaxle Connector C | P1860 | Refer to 4T60-E Transaxle Diagnosis
22 | Brn | 418 | TCC PWM Solenoid Control (4T65-E) | Transaxle Connector T | P1860 | Refer to 4T65-E Transaxle Diagnosis
23 | Gry | 1724 | Boost Control Solenoid Control (VIN 1 Only) | Boost Control Solenoid B | P1257 P1645 | Rough idle Reduced performance
24 | -- | -- | -- | -- | -- | --
25 | Brn/Wht | 419 | MIL Control | Instrument Panel / Remote Telltale Bank* | P1641 | No MIL MIL ON steady
26 | Ppl | 1490 | CCR Brake/Throttle Signal (with Command Ride RPO FW1) | CCR Module C3 (Pontiac) | -- | Throttle and brake lift/dive dampening inoperative
27 | Brn | 437 | Fuel Pump Speed PWM Control (VIN 1 Only) | Fuel Pump Control Module 7 | P1643 | Noisy fuel pump Lean condition during high load conditions
28 | Tan/Blk | 422 | TCC Enable Solenoid | Transaxle Connector D | P1864 | Refer to 4T60-E Transaxle Diagnosis
29 | Gry | 435 | EGR Control | EGR Valve A | P1406 | Incorrect/rough idle, lack of power, chuggle
30 | Dk Grn/Wht | 428 | EVAP Purge Valve Control | EVAP Purge Valve Solenoid A | P0441 P1441 P1655 | Rough idle
31 | Dk Blu | 473 | Fan 2 Control (High Speed) | High Speed Cooling Fan Relay 86 | P1652 | High speed cooling fans inoperative High speed secondary fan ON all the time Incorrect idle Possible overheating condition
32 | Dk Grn | 335 | Fan 1 Control (Low Speed) | Low Speed Cooling Fan Relay 86 | P1651 | Low speed cooling fans inoperative Low speed cooling fans ON all the time Incorrect idle Possible overheating condition
33 | Tan/Blk | 464 | Traction Control Delivered Torque (With Traction Control System RPO NW9 Only) | EBTCM 14 | P1653 | Traction control inoperative Traction Off lamp illuminated
34 | -- | -- | -- | -- | -- | --
35 | Dk Grn/Wht | 459 | A/C Compressor Clutch Relay Control | A/C Compressor Relay 85 | P1654 | Incorrect/rough idle A/C compressor inoperative
36 | -- | -- | -- | -- | -- | --
37 | -- | -- | -- | -- | -- | --
38 | -- | -- | -- | -- | -- | --
39 | -- | -- | -- | -- | -- | --
40 | -- | -- | -- | -- | -- | --
41 | -- | -- | -- | -- | -- | --
42 | -- | -- | -- | -- | -- | --
43 | -- | -- | -- | -- | -- | --
44 | Ppl/wht | 430 | 3X Reference | ICM D | P1374 | Stalls, sets DTC on restart
45 | Red/Blk | 453 | Reference Low | ICM L | -- | Intermittent symptoms
46 | Dk Blu/Wht | 1231 | Transaxle Input Speed Sensor Low | Transaxle Connector V | -- | Refer to 4T65-E Transaxle Diagnosis
47 | Ppl | 401 | VSS Low | VSS / TOSS B | P0502 | Speedometer inoperative Late/harsh shifting Chuggle
48 | -- | -- | -- | -- | -- | --
49 | -- | -- | -- | -- | -- | --
50 | -- | -- | -- | -- | -- | --
51 | -- | -- | -- | -- | -- | --
52 | Tan/Blk | 424 | Bypass | ICM B | P1361 | Incorrect/rough idle Lack of power
53 | Wht | 423 | Ignition Control (IC) | ICM A | P1350 P1361 | Incorrect/rough idle Lack of power
54 | Yel | 492 | Mass Air Flow Signal | MAF Sensor A | P0101 P0102 P0103 | Reduced performance
55 | Dk Blu | 229 | Theft Deterrent Fuel Enable | Theft Deterrent Module A3 | P1626 | Possible no start
56 | Blk | 452 | Sensor Ground | ECT Sensor A, TP Sensor A, MAP Sensor A, IAT Sensor A, A/C Refrigerant Pressure Sensor A, EGR Valve B, Transaxle Connector G, Fuel Tank Pressure Sensor A | P0108 P0118 P0123 P0440 P0530

P0713

P1106

P1115

P1121

P1406

Cooling fans ON all the time

A/C compressor inoperative

Incorrect/rough idle

Lack of power

Late/harsh shifting

Chuggle

57 | -- | -- | -- | -- | -- | --
58 | -- | -- | -- | -- | -- | --
59 | Ppl | 1807 | Class 2 Data | DLC 2 | None | No scan tool data
60 | Blk/Wht | 451 | PCM Ground | Engine block below cyl #2 spark plug | None | Intermittent symptoms
61 | -- | -- | -- | -- | -- | --
62 | Lt Grn / Dk Grn/Wht | 66 / 762 | A/C Request | A/C Control Head or A/C Programmer* | -- | A/C Compressor inoperative
63 | -- | -- | -- | -- | -- | --
64 | -- | -- | -- | -- | -- | --
65 | -- | -- | -- | -- | -- | --
66 | Ppl | 1986 | EVAP Vacuum Switch (VIN 1 Only) | EVAP Canister Purge Vacuum Switch B | P1442 | --
67 | Ppl | 420 | TCC Brake Switch | TCC Brake Switch A, Brake Transaxle Shift Interlock | P0719 P0724 | Refer to 4T60-E Transaxle Diagnosis
68 | Pnk | 639 | EGR Ignition Filter | EGR Valve E , Heated Oxygen Sensor 1 D , Heated Oxygen Sensor 2 D | P0401 P1406 P0133 P0135 P0141 P0147 P0153 P0155 | Fuse blown, EGR Pintle Position error on scan tool varies excessively
69 | Blk/Wht | 771 | Transaxle Range Switch A (All Except Oldsmobile with U2A or UH8 Cluster) | Transaxle Range Switch 4-way connector D | P0705 | Incorrect Idle
70 | Brn | 1174 | Engine Oil Level Switch (All Except Buick with U23 Cluster) | Engine Oil Level Switch A | -- | Low Oil Lamp ON for 1 minute after startup
71 | Pnk/Blk | 1379 | Engine Oil Life Monitor Reset | Oil Life Monitor Reset Switch A | P1619 | Change Oil Lamp ON for 1 minute after startup
72 | Wht | 776 | Transaxle Range Switch P (All Except Oldsmobile with U2A or UH8 Cluster) | Transaxle Range Switch 4-way connector A | P0705 | Incorrect idle
72 | Orn/Blk | 434 | Park/Neutral Position Input (Oldsmobile with U2A or UH8 Cluster only) | Transaxle Range Switch 7-way conn. A | P1520 | High Idle
73 | -- | -- | -- | -- | -- | --
74 | -- | -- | -- | -- | -- | --
75 | Wht | 85 | Cruise Status | SMCC II Cruise Control Module J | P1554 | --
76 | -- | -- | -- | -- | -- | --
77 | -- | -- | -- | -- | -- | --
78 | -- | -- | -- | -- | -- | --
79 | -- | -- | -- | -- | -- | --
80 | -- | -- | -- | -- | -- | --

#### PCM 80-Way Clear Connector C2 Details

Connector Part Information | Clear PCM Connector C2

• | Body - 12160549

• | TPA - 1216056A

• | Terminals - 12084913

• | Shield - 12160921

Pin | Wire Color | Circuit No. | Function | Component Connector Cavity | DTC(s) Affected | Possible Symptoms From a Faulty Circuit
--- | --- | --- | --- | --- | --- | ---
1 | -- | -- | -- | -- | -- | --
2 | -- | -- | -- | -- | -- | --
3 | -- | -- | -- | -- | -- | --
4 | -- | -- | -- | -- | -- | --
5 | Orn | 901 | Fuel Level PWM Control (Buick) | Instrument Panel | -- | Fuel gauge inoperative
5 | Ppl/Wht | 455 | Fuel Level PWM Control (Pontiac) | Instrument Panel | -- | Fuel gauge inoperative
6 | Wht | 1310 | EVAP Vent Valve Control (VIN K only) | EVAP Vent Valve Solenoid B | P0440 P0446 P1675 | --
7 | Brn/Wht | 1173 | Low Engine Oil Level Lamp Control | Instrument Panel / Remote Telltale Bank* | P1672 | Low Oil lamp ON all the time Low Oil lamp never ON
8 | Gry | 803 | Oil Life Monitor Lamp Control (Buick only) | Instrument Panel / Remote Telltale Bank* | P1671 | Change Oil lamp ON all the time Change Oil lamp never ON
9 | -- | -- | -- | -- | -- | --
10 | Dk Grn | 35 | Engine Hot Lamp Control (All Except Oldsmobile with UH8 or U2A Cluster | Instrument Panel / Remote Telltale Bank* | 1673 | Hot lamp ON all the time Hot lamp never ON
11 | Lt Grn | 1222 | Shift Solenoid A Control | Transaxle Connector A | P0753 | Refer to 4T60-E Transaxle Diagnosis / 4T65-E Transaxle Diagnosis
12 | Lt Grn | 432 | Manifold Absolute Pressure Sensor | MAP Sensor B | P0107 P0108 P1106 P1107 | Default manifold absolute pressure and BARO Noisy fuel pump on VIN 1
13 | Dk Grn | 83 | Cruise Control Inhibit Control | SMCC II Cruise Control Module H | P1662 | Cruise control inoperative
14 | -- | -- | -- | -- | -- | --
15 | -- | -- | -- | -- | -- | --
16 | Brn | 25 | Generator Lamp Control (All Except Oldsmobile with UH8 or U2A Cluster) | Instrument Panel / Remote Telltale Bank* | P1663 | No generator lamp Generator lamp ON all the time
17 | Yel/Blk | 1223 | Shift Solenoid B Control | Transaxle Connector B | P0758 | Refer to 4T60-E Transaxle Diagnosis / 4T65-E Transaxle Diagnosis
18 | -- | -- | -- | -- | -- | --
19 | -- | -- | -- | -- | -- | --
20 | Lt/Blu | 1229 | Pressure Control Solenoid Low (w/4T65-E) | Transaxle Connector D | P0748 | Refer to 4T65-E Transaxle Diagnosis
21 | Blk/Wht | 451 | PCM Ground | Engine block below cyl #2 spark plug | None | Intermittent symptoms
22 | Pnk/Blk | 1746 | Injector Control Cylinder 3 | Injector Connector B | P0300 P1200 | Incorrect/rough idle Misfire Flashing MIL
23 | Yel | 772 | Transaxle Range Switch B (All Except Oldsmobile with UH8 or U2A Cluster) | Transaxle Range Switch 4-way conn. B | P0705 | Incorrect idle
24 | Lt Grn/Blk | 1745 | Injector Control Cylinder 2 | Injector #2 B | P0300 P1200 | Incorrect/rough idle Misfire Flashing MIL
25 | Gry | 773 | Transaxle Range Switch C (All Except Oldsmobile with UH8 or U2A Cluster) | Transaxle Range Switch 4-way conn. C | P0705 | Incorrect idle
26 | Blk | 1744 | Injector Control Cylinder 1 | Injector #1 B | P0300 P1200 | Incorrect/rough idle Misfire Flashing MIL
27 | Pnk | 1224 | Pressure Switch Manifold A (w/4T65-E) | Transaxle Connector N | P1810 | Refer to 4T65-E Transaxle Diagnosis
28 | Yel/Blk | 846 | Injector Control Cylinder 6 | Injector #6 B | P0300 P1200 | Incorrect/rough idle Misfire Flashing MIL
29 | Drk Blu | 1225 | Pressure Switch Manifold B (w/4T65-E) | Transaxle Connector R | P1810 | Refer to 4T65-E Transaxle Diagnosis
30 | Blk/Wht | 845 | Injector Control Cylinder 5 | Injector #5 B | P1200 P0300 | Incorrect/rough idle Misfire Flashing MIL
31 | Red | 1226 | Pressure Switch Manifold C (w/4T65-E) | Transaxle Connector P | -- | Refer to 4T65-E Transaxle Diagnosis
32 | Lt Blu/Blk | 844 | Injector Control Cylinder 4 | Injector #4 B | P1200 P0300 | Incorrect/rough idle Misfire Flashing MIL
33 | -- | -- | -- | -- | -- | --
34 | -- | -- | -- | -- | -- | --
35 | Red | 225 | Generator Control | Generator L | 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 A | P0131 P0132 P0134 | Open loop fuel control
46 | Tan | 413 | HO2S 1 Low | HO2S 1 B | P0134 | Open loop fuel control
47 | Ppl/Wht | 1668 | HO2S 2 Signal | HO2S 2 A | P0137 P0138 P0140 | --
48 | Tan/Wht | 1669 | HO2S 2 Low | HO2S 2 B | P0140 | --
49 | -- | -- | -- | -- | -- | --
50 | -- | -- | -- | -- | -- | --
51 | Tan | 472 | Intake Air Temperature Sensor | IAT Sensor B | P0112 P0113 P1111 P1112 | --
52 | Yel | 410 | Engine Coolant Temperature Sensor | ECT Sensor B | P0117 P0118 P1114 P1115 | Hard start Incorrect/rough Idle Cooling fans ON
53 | Dk Blu | 417 | Throttle Position Sensor | TP Sensor B | P0122 P0123 P1121 P1122 | Late/harsh shifting TPS default
54 | -- | -- | -- | -- | -- | --
55 | -- | -- | -- | -- | -- | --
56 | -- | -- | -- | -- | -- | --
57 | -- | -- | -- | -- | -- | --
58 | -- | -- | -- | -- | -- | --
59 | -- | -- | -- | -- | -- | --
60 | Blk/Wht | 451 | PCM Ground | Engine block below cyl #2 spark plug | None | Intermittent symptoms
61 | Red/Blk | 1228 | Pressure Control Solenoid High (w/4T65-E) | Transaxle Connector C | P0748 | Refer to 4T65-E Transaxle Diagnosis
62 | Gry | 23 | Generator F Terminal | Generator F | None | Generator lamp commanded ON
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 | EGR Valve C | P1406 | Incorrect/rough idle Cuts-out Chuggle Misfire
66 | -- | -- | -- | -- | -- | --
67 | Dk Grn | 890 | Fuel Tank Pressure Sensor (VIN K Only) | Fuel Tank Pressure Sensor B | P0440 | --
68 | -- | -- | -- | -- | -- | --
69 | Lt Blu | 553 | Shift Mode Switch (Pontiac) | Shift Select Switch G | -- | Refer to 4T60-E Transaxle Diagnosis
70 | -- | -- | -- | -- | -- | --
71 | Yel/Blk | 1227 | Transaxle Fluid Temperature Sensor | Transaxle Connector F (w/4T60-E) | P0712 P0713 | Refer to 4T60-E Transaxle Diagnosis
71 | Yel/Blk | 1227 | Transaxle Fluid Temperature Sensor | Transaxle Connector L (w/4T65-E) | P0712 P0713 | Refer to 4T65-E Transaxle Diagnosis
72 | -- | -- | -- | -- | -- | --
73 | Red/Blk | 380 | A/C Refrigerant Pressure Sensor | A/C Refrigerant Pressure Sensor C | P0530 | A/C compressor inoperative
74 | Ppl | 30 | Fuel Tank Level Sensor (VIN K Only) | Fuel Level Module* | -- | --
75 | Yel | 657 | TCC Release Switch (w/4T65-E) | Transaxle Connector U | P1887 | Refer to 4T65-E Transaxle Diagnosis
76 | -- | -- | -- | -- | -- | --
77 | -- | -- | -- | -- | -- | --
78 | -- | -- | -- | -- | -- | --
79 | -- | -- | -- | -- | -- | --
80 | -- | -- | -- | -- | -- | --