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Engine Control Module (ECM) X1 (LH2)

Fig 1: Connector End View Engine Control Module (ECM) X1 (LH2)
GM1228485Courtesy of GENERAL MOTORS COMPANY
Engine Control Module (ECM) X1 (LH2)

Pin Wire Circuit Function
1-6 - - Not Available
7 0.35 WH 17 Stop Lamp Switch Signal
8 - - Not Available
9 0.35 TN 2759 Low Reference
10-11 - - Not Available
12 0.5 BN/WH 419 MIL Control
13 0.5 D-GN/WH 465 Fuel Pump Relay Control
14-17 - - Not Available
18 0.35 YE/BK 5728 ECM/TCM Serial Data Wake Up
19 0.75 PK 239 Run/Crank Ignition 1 Voltage
20 0.5 RD/WH 1440 Battery Positive Voltage
21-32 - - Not Available
33 0.5 WH/BK 1164 5-Volt Reference 1
34 0.35 GY 2709 5-Volt Reference 1
35 0.5 TN 1274 5-Volt Reference 1
36 0.5 BN 1271 Low Reference
37 0.5 PU 1272 Low Reference
38 - - Not Available
39 0.35 BN 818 Vehicle Speed Signal
40 0.35 BN 5069 Powertrain Relay Control
41-43 - - Not Available
44 0.5 D-BU 1936 Fuel Level Sensor Signal
45 0.5 L-BU 1937 Secondary Fuel Level Sensor Signal
46 - - Not Available
47 0.5 D-BU 1161 APP Sensor 1 Signal
48 0.5 D-GN 890 Fuel Tank Pressure Sensor Signal
49 0.5 L-BU 1162 APP Sensor 2 Signal
50-52 - - Not Available
53 0.35 D-GN/WH 459 A/C Compressor Clutch Relay Control
54 0.35 D-BU 473 High Speed Cooling Fan Relay Control
55 0.5 WH 1310 EVAP Canister Vent Solenoid Control
56 0.35 YE 447 Starter Relay Coil Control
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 34576-4203
  • Service Connector: 88988373
  • Description: 56-Way F Sealed (BU)
Terminal Part Information
  • Pins: 7, 9, 18, 34, 39, 40, 53, 54, 56
  • 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: 12, 13, 19, 20, 33, 35, 36, 37, 44, 45, 47, 48, 49, 55
  • Terminated Lead: 13575575
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins 12, 13, 20, 33, 35, 36, 37, 44, 45, 47, 48, 49, 55 - J/J
  • Core/Insulation Crimp: Pin 19 - K/K
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