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Home >> Buick >> 2005 >> Allure CX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.8L - Introduction (2 Of 2) >> Component Locator >> Powertrain Control Module (PCM) Connector End Views
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Powertrain Control Module (PCM) Connector End Views

Powertrain Control Module (PCM) C1 (NU3)

GM1228485Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • OEM: 15460473
  • Service: See Catalog
  • 56-Way F Micro-Pack 64 Series (BU)
Pin Wire Color Circuit No. Function
1-3 - - Not Used
4 GY 2700 5-Volt Reference
5 - - Not Used
6 BN/WH 419 MIL Control
7 BK 2751 Low Reference
8 BK 2759 Low Reference
9 - - Not Used
10 WH 1310 EVAP Canister Vent Solenoid Valve Control
11 - - Not Used
12 BK 476 Low Reference
13-14 - - Not Used
15 D-GN 1049 PCM Class 2 Serial Data
16-17 - - Not Used
18 BN 1141 Ignition 3 Voltage
19 PK 439 Ignition 1 Voltage
20 OG 540 Battery Positive Voltage
21 WH 121 Engine Speed Signal (JL9)
22 D-GN 389 Vehicle Speed Signal
23 YE/BK 625 Starter Enable Relay Control
24 BN 5069 Powertrain Relay Control
25 - - Not Used
26 D-GN 890 Fuel Tank Pressure Sensor Signal
27-30 - - Not Used
31 RD/BK 380 A/C Refrigerant Pressure Sensor Signal
32 WH 17 Stop Lamp Switch Signal
33 D-GN/WH 459 A/C Compressor Clutch Relay Control
34 BN 436 Air Pump Relay Control
35-36 - - Not Used
37 D-GN/WH 465 Fuel Pump Relay Control
38-42 - - Not Used
43 PU 1589 Fuel Level Sensor Signal
44 GY 1884 Cruise Control Set/Coast and Resume/Accelerate Switch Signal
45-47 - - Not Used
48 D-GN 335 Low Speed Cooling Fan Relay Control
49 - - Not Used
50 D-BU 473 High Speed Cooling Fan Relay Control
51-52 - - Not Used
53 GY 2709 5-Volt Reference
54-56 - - Not Used
Powertrain Control Module (PCM) C1 (W/O NU3)

GM1228485Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • OEM: 15418488
  • Service: See Catalog
  • 56-Way F Micro-Pack 64 Series (BU)
Pin Wire Color Circuit No. Function
1-3 - - Not Used
4 GY 2700 5-Volt Reference
5 - - Not Used
6 BN/WH 419 MIL Control
7 BK 2751 Low Reference
8 BK 2759 Low Reference
9 - - Not Used
10 WH 1310 EVAP Canister Vent Solenoid Valve Control
11-14 - - Not Used
15 D-GN 1049 PCM Class 2 Serial Data
16-17 - - Not Used
18 BN 1141 Ignition 3 Voltage
19 PK 439 Ignition 1 Voltage
20 OG 540 Battery Positive Voltage
21 WH 121 Engine Speed Signal (JL9)
22 D-GN 389 Vehicle Speed Signal
23 YE/BK 625 Starter Enable Relay Control
24 BN 5069 Powertrain Relay Control
25 - - Not Used
26 D-GN 890 Fuel Tank Pressure Sensor Signal
27-30 - - Not Used
31 RD/BK 380 A/C Refrigerant Pressure Sensor Signal
32 WH 17 Stop Lamp Switch Signal
33 D-GN/WH 459 A/C Compressor Clutch Relay Control
34-36 - - Not Used
37 D-GN/WH 465 Fuel Pump Relay Control
38-42 - - Not Used
43 PU 1589 Fuel Level Sensor Signal
44 GY 1884 Cruise Control Set/Coast and Resume/Accelerate Switch Signal
45-47 - - Not Used
48 D-GN 335 Low Speed Cooling Fan Relay Control
49 - - Not Used
50 D-BU 473 High Speed Cooling Fan Relay Control
51-52 - - Not Used
53 GY 2709 5-Volt Reference
54-56 - - Not Used
Powertrain Control Module (PCM) C2 (NU3)

GM1524159Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • OEM: 15460475
  • Service: See Catalog
  • 73-Way F Micro-Pack 64 Series (BK)
Pin Wire Color Circuit No. Function
1 BN 1456 EGR Valve Position Signal
2 OG/BK 1061 UART Serial Data Secondary
3 TN 800 UART Serial Data Primary
4 BK/WH 845 Fuel Injector 5 Control
5 BK 1744 Fuel Injector 1 Control
6 YE/BK 846 Fuel Injector 6 Control
7 PK/BK 1746 Fuel Injector 3 Control
8 BK 2753 Low Reference
9 L-GN/BK 1745 Fuel Injector 2 Control
10 L-BU/BK 844 Fuel Injector 4 Control
11 TN/BK 424 IC Timing Signal
12 BK/WH 3112 HO2S Heater Low Control Sensor 1
13 RD 1676 EGR Solenoid High Control
14-15 - - Not Used
16 GY 435 EGR Solenoid Low Control
17 - - Not Used
18 L-GN 432 MAP Sensor Signal
19-25 - - Not Used
26 BK 630 Camshaft Position Signal
27 PU/WH 430 Low Resolution Engine Speed Signal
28 L-BU/BK 647 Medium Resolution Engine Speed Signal
29 BK 2761 Low Reference
30 OG/BK 469 Low Reference
31 BN 1174 Oil Level Switch Signal
32 - - Not Used
33 GY 2702 5-Volt Reference
34 GY 2704 5-Volt Reference
35 GY 474 5 Volt Reference
36 - - Not Used
37 RD/BK 453 Low Reference
38-40 - - Not Used
41 D-GN/WH 428 EVAP Canister Purge Solenoid Valve Control
42-44 - - Not Used
45 GY 23 Generator Field Duty Cycle Signal
46 D-BU 496 Knock Sensor 1 Signal
47 TN/WH 3111 HO2S Low Signal
48 PU/WH 3110 HO2S High Signal
49-52 - - Not Used
53 RD 225 Generator Turn On Signal
54 - - Not Used
55 YE 410 ECT Sensor Signal
56 - - Not Used
57 TN/BK 231 Oil Pressure Switch Signal
58 L-BU 1876 Knock Sensor 2 Signal
59 PK/BK 429 Air Solenoid Control
60 - - Not Used
61 WH 423 IC Timing Control
62-72 - - Not Used
73 BK/WH 451 Ground
Powertrain Control Module (PCM) C2 (W/O NU3)

GM1524157Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • OEM: 15462060
  • Service: See Catalog
  • 73-Way F Micro-Pack 64 Series (BK)
Pin Wire Color Circuit No. Function
1 BN 1456 EGR Valve Position Signal
2 OG/BK 1061 UART Serial Data Secondary
3 TN 800 UART Serial Data Primary
4 BK/WH 845 Fuel Injector 5 Control
5 BK 1744 Fuel Injector 1 Control
6 YE/BK 846 Fuel Injector 6 Control
7 PK/BK 1746 Fuel Injector 3 Control
8 BK 2753 Low Reference
9 L-GN/BK 1745 Fuel Injector 2 Control
10 L-BU/BK 844 Fuel Injector 4 Control
11 TN/BK 424 IC Timing Signal
12 BK/WH 3112 HO2S Heater Low Control Sensor 1
13 RD 1676 EGR Solenoid High Control
14-15 - - Not Used
16 GY 435 EGR Solenoid Low Control
17 - - Not Used
18 L-GN 432 MAP Sensor Signal
19-25 - - Not Used
26 BK 630 Camshaft Position Signal
27 PU/WH 430 Low Resolution Engine Speed Signal
28 L-BU/BK 647 Medium Resolution Engine Speed Signal
29 BK 2761 Low Reference
30 OG/BK 469 Low Reference
31 BN 1174 Oil Level Switch Signal
32 - - Not Used
33 GY 2702 5-Volt Reference
34 GY 2704 5-Volt Reference
35-36 - - Not Used
37 RD/BK 453 Low Reference
38-40 - - Not Used
41 D-GN/WH 428 EVAP Canister Purge Solenoid Valve Control
42-44 - - Not Used
45 GY 23 Generator Field Duty Cycle Signal
46 D-BU 496 Knock Sensor 1 Signal
47 TN/WH 3111 HO2S Low Signal
48 PU/WH 3110 HO2S High Signal
49-52 - - Not Used
53 RD 225 Generator Turn On Signal
54 - - Not Used
55 YE 410 ECT Sensor Signal
56 - - Not Used
57 TN/BK 231 Oil Pressure Switch Signal
58 L-BU 1876 Knock Sensor 2 Signal
59-60 - - Not Used
61 WH 423 IC Timing Control
62-72 - - Not Used
73 BK/WH 451 Ground
Powertrain Control Module (PCM) C3 (NU3)

GM1524164Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • OEM: 15460474
  • Service: See Catalog
  • 56-Way F Micro-Pack 64 Series (GY)
Pin Wire Color Circuit No. Function
1-3 - - Not Used
4 TN/WH 3121 HO2S Low Signal
5 YE/BK 1227 TFT Sensor Signal
6 YE 492 MAF Sensor Signal
7 - - Not Used
8 BK/WH 3122 HO2S Heater Low Control - Sensor 2
9-10 - - Not Used
11 RD/BK 1230 AT ISS High Signal
12 YE 400 VSS High Signal
13-14 - - Not Used
15 GY 773 Transmission Range Switch Signal C
16-18 - - Not Used
19 PU 3120 HO2S High Signal
20-21 - - Not Used
22 YE 772 Transmission Range Switch Signal B
23 WH 776 Transmission Range Switch Signal P
24 WH 1804 TCC Release Switch Signal
25 - - Not Used
26 TN 472 IAT Sensor Signal
27-30 - - Not Used
31 WH 5268 Air Pressure Sensor
32 - - Not Used
33 L-GN 1222 1-2 Shift Solenoid Valve Control
34 BK/WH 771 Transmission Range Switch Signal A
35-38 - - Not Used
39 TN/BK 422 TCC Solenoid Valve Control
40-43 - - Not Used
44 PU 401 VSS Low Signal
45 - - Not Used
46 YE/BK 1223 2-3 Shift Solenoid Valve Control
47 RD/BK 1228 PC Solenoid Valve High Control (Sol. A)
48 BK 452 Low Reference
49 D-BU/WH 1231 AT ISS Low Signal
50 BK 2760 Low Reference
51 L-BU/WH 1229 PC Solenoid Valve Low Control (Sol. A)
52-56 - - Not Used
Powertrain Control Module (PCM) C3 (W/O NU3)

GM1524162Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • OEM: 15418487
  • Service: See Catalog
  • 56-Way F Micro-Pack 64 Series (GY)
Pin Wire Color Circuit No. Function
1-3 - - Not Used
4 TN/WH 3121 HO2S Low Signal
5 YE/BK 1227 TFT Sensor Signal
6 YE 492 MAF Sensor Signal
7 - - Not Used
8 BK/WH 3122 HO2S Heater Low Control - Sensor 2
9-10 - - Not Used
11 RD/BK 1230 AT ISS High Signal
12 YE 400 VSS High Signal
13-14 - - Not Used
15 GY 773 Transmission Range Switch Signal C
16-18 - - Not Used
19 PU 3120 HO2S High Signal
20-21 - - Not Used
22 YE 772 Transmission Range Switch Signal B
23 WH 776 Transmission Range Switch Signal P
24 WH 1804 TCC Release Switch Signal
25 - - Not Used
26 TN 472 IAT Sensor Signal
27-32 - - Not Used
33 L-GN 1222 1-2 Shift Solenoid Valve Control
34 BK/WH 771 Transmission Range Switch Signal A
35-38 - - Not Used
39 TN/BK 422 TCC Solenoid Valve Control
40-43 - - Not Used
44 PU 401 VSS Low Signal
45 - - Not Used
46 YE/BK 1223 2-3 Shift Solenoid Valve Control
47 RD/BK 1228 PC Solenoid Valve High Control (Sol. A)
48 BK 452 Low Reference
49 D-BU/WH 1231 AT ISS Low Signal
50 BK 2760 Low Reference
51 L-BU/WH 1229 PC Solenoid Valve Low Control (Sol. A)
52-56 - - Not Used
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