SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 417 (COMPONENT LOCATIONS & COMPONENT CONNECTOR END VIEWS)COMPONENT CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) X1 (LY7)
2008 Pontiac Grand Prix Base

Engine Control Module (ECM) X1 (LY7)

2008 Pontiac Grand Prix BaseSECTION Engine Control Module (ECM) X1 (LY7)
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) X1 (LY7) Connector End View
GM816165Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X1 (LY7)

Pin Wire Circuit Function
1 0.5 TN 407 Knock Sensor 2 Signal
2 - - Not Used
3 0.5 L-GN 5278 HO2S Input Pump Current Sensor 1
4 0.5 OG 5275 CMP Sensor Signal - Intake Bank 1
5 0.75 GY 605 5-Volt Reference 1
6 - - Not Used
7 0.75 TN 470 Low Reference
8 0.5 PU 486 TP Sensor 2 Signal
9 0.5 D-GN/WH 2124 Ignition Control 4
10 0.5 WH/BK 5039 CKP Sensor Signal
11 - - Not Used
12 0.75 OG/BK 5272 CMP Actuator Solenoid Control - Intake Bank 2
13 0.75 L-GN 5282 CMP Actuator Solenoid Control - Exhaust Bank 1
14 - - Not Used
15 0.75 BN 582 TAC Motor Control - 2
16 0.75 GY/WH 3113 HO2S Heater Low Control Sensor 1
17 0.5 GY 1716 Knock Sensor 1 Signal
18 - - Not Used
19 0.5 PU/WH 1665 HO2S High Signal
20 0.5 D-GN 5273 CMP Sensor Signal - Exhaust Bank 1
21 0.5 GY 23 Generator Field Duty Cycle Signal
22 - - Not Used
23 0.5 YE 410 ECT Sensor Signal
24 - - Not Used
25 0.5 L-BU/WH 2126 Ignition Control 6
26 0.5 OG/WH 2122 Ignition Control 2
27-28 - - Not Used
29 0.75 PU 5284 Actuator Solenoid Control - Intake Bank 1
30 0.75 WH/BK 5283 Actuator Solenoid Control - Exhaust Bank 2
31 0.75 YE 581 TAC Motor Control - 1
32 - - Not Used
33 0.5 D-BU 496 Knock Sensor 1 Signal
34 - - Not Used
35 0.5 WH 5279 HO2S Pump Current
36 0.5 PU 5274 CMP Sensor Signal - Exhaust Bank 2
37-38 - - Not Used
39 0.5 TN 2752 Low Reference
40 0.5 TN/BK 231 Engine Oil Pressure Switch Signal
41 0.5 D-GN 2125 Ignition Control 5
0.5 PU 2121 Ignition Control 1
43 0.5 OG 225 Generator Turn On Signal
44 - - Not Used
45 0.75 L-BU/BK 844 Fuel Injector 4 Control
46 0.75 PK/BK 1746 Fuel Injector 3 Control
47 0.75 TN/WH 845 Fuel Injector 5 Control
48 0.35 D-GN/WH 428 EVAP Canister Purge Solenoid Valve Control
49 0.5 GY/BK 1798 Ground
50 0.5 L-BU 1876 Knock Sensor 2 Signal
51 - - Not Used
52 0.5 TN 1664 HO2S Low Signal
53 0.5 YE 5276 CMP Sensor Signal Intake Bank 2
54 0.5 GY 2701 5-Volt Reference
55 0.5 D-GN 485 TP Sensor 1 Signal
56 0.5 L-GN/BK 5266 MAP Sensor Signal
57 0.75 GY 705 5-Volt Reference 2
58 0.5 L-BU 2123 Ignition Control 3
59 0.5 PU/WH 5024 Low Reference
60-61 - - Not Used
62 0.75 L-GN/BK 1745 Fuel Injector 2 Control
63 0.75 TN 1744 Fuel Injector 1 Control
64 0.75 YE/BK 846 Fuel Injector 6 Control
Connector Part Information 
  • OEM: 1 928 403 379
  • Service: See Catalog
  • Description: 64-Way F (BK)
Terminal Part Information 
  • Pins: 1, 3-5, 7-10, 12, 13, 15-17, 19-21, 23, 25, 26, 29-31, 33, 35-43, 45-50, 52-59, 62-64
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.