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Engine Control Module (ECM) X1 (L20, L9H, LC9 or LMG)

GM1590596Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness: Engine
  • OEM: 13616079
  • Service: 88988931
  • Description: 73-Way F Receptacle 0.64 2.8 Series Sealed (BK)

Terminal Part Information
  • Pins: 1, 12, 13, 16, 17, 23, 24, 29-34, 36, 50, 51, 56-59, 68, 70, 71
  • Terminated Lead: 13575811
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Pins: 2, 3, 9-11, 18, 20, 26- 28, 37, 38, 41, 42, 47, 49, 52, 54, 61, 63-65, 69, 71, 72
  • Terminated Lead: 13575575
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Pin: 73
  • Terminated Lead: Pending
  • Release Tool: J-38125-11A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
Engine Control Module (ECM) X1 (L20, L9H, LC9 or LMG)

Pin Wire Circuit Function
1 0.35 OG/BK 1786 Park/Neutral Signal
2 0.5 GY/BK 1694 4WD Low Signal (NQG)
3 0.5 TN/WH 1695 Axle Switch Signal (NQG)
4-8 - - Not Used
9 0.5 L-BU/WH 6311 Brake 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 0.35 OG/BK 380 A/C Refrigerant Pressure Sensor Signal (CJ2 or C67)
13 0.35 TN 5514 Low Reference (CJ2 or C67)
14-15 - - Not Used
16 0.35 PU 1589 Fuel Level Sensor Signal - Primary
17 0.35 D-BU/WH 473 High Speed Cooling Fan Relay Control
18 0.5 D-BU 5985 Accessory Wakeup Serial Data
19 0.5 PK 439 Ignition 1 Voltage
20 0.5 RD/WH 440 Battery Positive Voltage
21-22 - - Not Used
23 0.35 PU 1272 Low Reference
24 0.35 D-GN 890 Fuel Tank Pressure Sensor Signal
25 - - Not Used
26 0.5 YE 5361 Brake Apply Sensor Signal
27 0.5 TN/BK 2501 High Speed GMLAN Serial Data Bus (-)
28 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
29 0.35 D-BU 1161 APP Sensor 1 Signal
30 0.35 BN 1271 Low Reference
31 0.35 TN/BK 6049 Low Reference
32 0.35 L-BU 1162 APP Sensor 2 Signal
33 0.35 GY 2709 5-Volt Reference 1
34 0.35 GY/WH 2700 5-Volt Reference 1
35 0.5 TN 2760 Low Reference
36 0.35 TN 1274 5-Volt Reference 1
37 0.5 TN/BK 472 IAT Sensor Signal
38 0.5 TN 2760 Low Reference
39-40 - - Not Used
41 0.5 YE 492 MAF Sensor Signal
42 0.5 BN 5360 Brake Apply Sensor Low Reference
43-46 - - Not Used
47 0.5 PK/BK 1339 Ignition 1 Voltage
48 - - Not Used
49 0.5 TN 1671 HO2S Low Signal Bank 2 Sensor 2
50 0.35 D-GN/WH 465 Fuel Pump Control Module Enable Signal
51 - - Not Used
52 0.5 YE/BK 625 Starter Enable Relay Control
53 - - Not Used
54 0.5 WH 5359 Brake Apply Sensor Supply Voltage
55 - - Not Used
56 0.35 WH/BK 1164 5-Volt Reference 2
57 - - Not Used
58 0.35 D-GN 335 Low Speed Cooling Fan Relay Control
59 0.35 YE 5991 Powertrain Relay Coil Control
60 - - Not Used
61 0.5 WH 1310 EVAP Canister Venst Solenoid Control
62 - - Not Used
63 0.35 D-GN/WH 459 A/C Compressor Clutch Relay Control (CJ2 or C67)
64 0.5 OG/WH 3223 HO2S Heater Low Control Bank 2 Sensor 2
65 0.5 GY/WH 3122 HO2S Heater Low Control Bank 1 Sensor 2
66-67 - - Not Used
68 0.35 BN/WH 419 MIL Control
69 0.5 PU 1670 HO2S High Signal Bank 2 Sensor 2
70 - - Not Used
71 0.35 OG/BK 6399 Replicated TOS Signal (except 31 Series without NQF or NQG)
0.5 PU/WH 821 Vehicle Speed Sensor (VSS) High Signal (MYC with NQG or NQH)
72 0.5 L-GN/BK 822 Vehicle Speed Sensor (VSS) Low Signal (MYC with NQG or NQH)
73 3 BK/WH 451 Ground
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