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, late/harsh shifting, chuggle
7 | -- | -- | -- | -- | -- | --
8 | Dk Grn/Wht | 465 | Fuel Pump Relay | 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 | P1381 | DTC will set when misfire detected
16 | Gry | 416 | 5 Volt Reference A | TP Sensor C, MAP Sensor C, Fuel Tank Pressure 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 | -- | -- | -- | -- | -- | --
19 | Pnk | 439 | Ignition Feed | Refer to Fuse Block Details in Electrical Diagnosis | P0560 | No start
20 | Red | 1642 | Battery Feed | 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 Driver | Transaxle Connector C | P1860 | Incorrect/Rough Idle, Cuts-out/Misses
23 | Gry | 1724 | Boost Control Solenoid (VIN 1 Only) | Boost Control Solenoid B | P1645, P1257 | Rough idle, reduced performance
24 | -- | -- | -- | -- | -- | --
25 | Brn/Wht | 419 | MIL Driver | Instrument Panel / Remote Telltale Bank* | P1641 | No MIL, MIL ON Steady
26 | Ppl | 1490 | CCR Brake/Throttle Signal (with Command Ride RPO FW1 or Automatic Ride Control FX3 Only) | CCR Module C3 (Oldsmobile, Pontiac) E3 (Buick) | -- | Throttle and brake lift/dive dampening inoperative
27 | Brn | 437 | Fuel Pump PWM (VIN 1 Only) | Fuel Pump Controller 7 | P1643 | Noisy fuel pump, lean condition during high load conditions
28 | Tan/Blk | 422 | TCC Enable Solenoid Driver | Transaxle Connector D | P1864 | Refer to 4T60-E Transaxle Diagnosis
29 | Gry | 435 | EGR Control | EGR Valve A | P1406, P1635 | Incorrect/rough idle, lack of power, chuggle
30 | Dk Grn/Wht | 428 | EVAP Canister Purge Driver | EVAP Canister Purge Solenoid A | P1655, P0441, P1441 | Rough idle
31 | Dk Blu | 473 | Fan 2 Driver (High Speed) | High Speed Cooling Fan Relay 86 | P1652 | High Speed Fans inoperative, High Speed Secondary Fan ON all the time, incorrect idle, possible overheating condition
32 | Dk Grn | 335 | Fan 1 Driver (Low Speed) | Low Speed Cooling Fan Relay 86 | P1651 | Low Speed Fans inoperative, Low Speed Fans ON all the time, incorrect idle, possible overheating condition
33 | Tan/Blk | 464 | Traction Control Delivered Torque Driver (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 Driver | 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 | -- | -- | -- | -- | -- | --
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 | MAF 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 | Incorrect/rough idle, lack of power late/harsh shifting, chuggle, A/C compressor inoperative
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* | P0530 | A/C Compressor inoperative
63 | -- | -- | -- | -- | -- | --
64 | -- | -- | -- | -- | -- | --
65 | -- | -- | -- | -- | -- | --
66 | Ppl | 1986 | EVAP Vacuum Switch Input (All Except H Car with VIN K) | 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) | PNP Switch 4-way conn. A | P0705 | PCM defaults to D4 gear select position
70 | Brn | 1174 | Engine Oil Level Sensor (All Except Buick with U23 Cluster) | Engine Oil Level Sensor C | -- | 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) | PNP Switch 4-way conn. D | P0705 | PCM defaults to D4 gear select position
72 | Orn/Blk | 434 | PNP Input (Oldsmobile with U2A or UH8 Cluster only) | PNP Switch 4-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 Blue 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 | -- | -- | -- | -- | -- | --
6 | Wht | 1310 | EVAP Vent Solenoid (H Car with VIN K only) | EVAP Vent Solenoid B | P0440, P0446, P1675 | --
7 | Brn/Wht | 1173 | Low Oil Lamp | 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 (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 (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 Driver | Transaxle Connector A | P0753 | Refer to 4T60-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 Inhibit Driver | SMCC II Cruise Control Module H | P1662 | Cruise Control inoperative
14 | -- | -- | -- | -- | -- | --
15 | -- | -- | -- | -- | -- | --
16 | Brn | 25 | Generator Lamp (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 Driver | Transaxle Connector B | P0758 | Refer to 4T60-E Transaxle Diagnosis
18 | -- | -- | -- | -- | -- | --
19 | -- | -- | -- | -- | -- | --
20 | -- | -- | -- | -- | -- | --
21 | Blk/Wht | 451 | PCM Ground | Engine block below cyl #2 spark plug | None | Intermittent Symptoms
22 | Pnk/Blk | 1746 | Injector Cylinder 3 | Injector Connector B | P1200, P0300 | Incorrect/Rough Idle, Missing, Flashing MIL
23 | Yel | 772 | Transaxle Range Switch B (All Except Oldsmobile with UH8 or U2A Cluster) | PNP Switch 4-way conn. B | P0705 | PCM defaults to D4 gear select position
24 | Lt Grn/Blk | 1745 | Injector Cylinder 2 | Injector #2 B | P1200, P0300 | Incorrect/Rough Idle, Missing, 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 | PCM defaults to D4 gear select position
26 | Blk | 1744 | Injector Cylinder 1 | Injector #1 B | P1200, P0300 | Incorrect/Rough Idle, Missing, Flashing MIL
27 | -- | -- | -- | -- | -- | --
28 | Yel/Blk | 846 | Injector Cylinder 6 | Injector #6 B | P1200, P0300 | Incorrect/Rough Idle, Missing, Flashing MIL
29 | -- | -- | -- | -- | -- | --
30 | Blk/Wht | 845 | Injector Cylinder 5 | Injector #5 B | P1200, P0300 | Incorrect/Rough Idle, Missing, Flashing MIL
31 | -- | -- | -- | -- | -- | --
32 | Lt Blu/Blk | 844 | Injector Cylinder 4 | Injector #4 B | P1200, P0300 | Incorrect/Rough Idle, Missing, 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 Commanded 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 | -- | -- | -- | -- | -- | --
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/Misses, Chuggles
66 | Ppl | 30 | Fuel Tank Level Sensor (H Car with VIN K Only) | Fuel Level Module* | -- | --
67 | Dk Grn | 890 | Fuel Tank Pressure Sensor | 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 | P0712, P0713 | Refer to 4T60-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 | -- | -- | -- | -- | -- | --
75 | -- | -- | -- | -- | -- | --
76 | -- | -- | -- | -- | -- | --
77 | -- | -- | -- | -- | -- | --
78 | -- | -- | -- | -- | -- | --
79 | -- | -- | -- | -- | -- | --
80 | -- | -- | -- | -- | -- | --