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Engine Control Module (ECM) X1 (LNJ)

Fig 1: Engine Control Module (ECM) X1 (LNJ) Connector End View
GM1590592Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X1 (LNJ)

Pin Wire Circuit Function
1 0.5 OG/BK 1786 Park/Neutral Signal
2-8 - - Not Used
9 0.5 WH 17 Stop Lamp Switch Signal
10 0.5 PU/WH 1668 HO2S High Signal - Bank 1 Sensor 2
11 0.5 TN/WH 1669 HO2S Low Signal - Bank 1 Sensor 2
12 0.5 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
13 0.5 TN 5514 Low Reference
14-15 - - Not Used
16 0.5 PU 1589 Fuel Level Sensor Signal
17 0.5 D-BU 473 High Speed Cooling Fan Relay Control
18 0.5 BN 4 Ignition Voltage
19 0.5 PK 439 Ignition Voltage
20 0.5 RD/WH 1540 Battery Positive Voltage
21-22 - - Not Used
23 0.5 PU 1272 Low Reference
24 0.5 D-GN 890 Fuel Tank Pressure Sensor Signal
25-26 - - Not Used
27 0.5 TN 2501 High Speed GMLAN Serial Data Bus (-)
28 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
29 0.5 D-BU 1161 Accelerator Pedal Position (APP) Sensor 1 Signal
30 0.5 BN 1271 Low Reference
31 0.5 TN 2759 Low Reference
32 0.5 L-BU 1162 Accelerator Pedal Position (APP) Sensor 2 Signal
33 0.5 GY 2709 5-Volt Reference 1
34 0.5 GY 2700 5-Volt Reference 1
35 - - Not Used
36 0.5 TN 1274 5-Volt Reference 1
37 0.5 TN 472 IAT Sensor Signal
38 0.5 TN 2760 Low Reference
39-40 - - Not Used
41 0.5 YE 492 Mass Air Flow (MAF) Sensor Signal
42-46 - - Not Used
47 0.5 PK/BK 5290 Ignition Voltage
48-49 - - Not Used
50 0.5 D-GN/WH 465 Fuel Pump Relay Control
51 - - Not Used
52 0.5 YE 447 Starter Relay Coil Control
53-55 - - Not Used
56 0.5 WH/BK 1164 5-Volt Reference 2
57 - - Not Used
58 0.5 D-GN 335 Low Speed Cooling Fan Relay Control
59 0.5 BN 5069 Main Relay Control
60 - - Not Used
61 0.5 WH 1310 EVAP Canister Vent Solenoid Control
62 - - Not Used
63 0.5 D-GN/WH 459 A/C Compressor Clutch Relay Control
64 - - Not Used
65 0.5 GY/WH 3122 HO2S 2 Heater Low Control
66-67 - - Not Used
68 0.5 BN/WH 419 Malfunction Indicator Lamp (MIL) Control
69-72 - - Not Used
73 0.8 BK/WH 451 Ground
Connector Part Information 
  • OEM: 12582677
  • Service: 88988931
  • Description: 73-Way F Receptacle 0.64 2.8 Sealed (BK)
Terminal Part Information 
  • Pins: 1, 9-13, 16-20, 23-24, 27-34, 36-38, 41, 47, 50, 52, 56, 58-59, 61, 63, 65, 68
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 73
  • Terminal/Tray: 7116-4151-02/9
  • Core/Insulation Crimp: E/1
  • Release Tool/Test Probe: 12094430/J-35616-4A (PU)
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