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Home >> Cadillac >> 2006 >> STS V >> Repair and Diagnosis >> External Pages >> Different car >> Section 135 (Engine Control System & Fuel System - 4.6L - Introduction (2 Of 2)) >> Component Locator >> Engine Control Module Connector End Views >> Engine Control Module (ECM) C1

Engine Control Module (ECM) C1

WARNING: This page is about a different car, the 2007 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) C1 Connector End View
GM784851Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) C1Connector Parts Information

Connector Part Information 
  • OEM: 34576-0703
  • Service: 88988373
  • Description: 56-Way F (BU)
Terminal Part Information 
  • Pins: 7, 9, 12-13, 18, 26, 33-37, 40, 44-45, 47-49, 53-54
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 19-20, 55
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 1-2, 4-5, 7, 9, 10, 12-13, 15, 24-26, 28, 30, 33-35, 39-41, 43-46, 48-52, 55-56
  • Terminal/Tray: 1928498135/19
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) C1 Connector Terminal Identification

Pin Wire Color Circuit No. Function
1-6 - - Not Used
7 WH 17 Stop Lamp Switch Signal
8 - - Not Used
9 TN 2759 Low Reference
10-11 - - Not Used
12 BN/WH 419 MIL Control
13 D-GN/WH 465 Fuel Pump Relay Control [- Primary]
14-17 - - Not Used
18 D-BU 5985 Accessory Wakeup Serial Data
19 PK 239 Ignition 1 Voltage
20 RD/WH 340 Battery Positive Voltage
21-25 - - Not Used
26 YE 447 Starter Relay Coil Control
27-32 - - Not Used
33 WH/BK 1164 5-Volt Reference
34 GY 2709 5-Volt Reference
35 TN 1274 5-Volt Reference
36 BN 1271 Low Reference
37 PU 1272 Low Reference
38-39 - - Not Used
40 BN 5069 Main Relay Control
41-43 - - Not Used
44 D-BU 1936 Fuel Level Sensor Signal [- Primary]
45 L-BU 1937 Fuel Level Sensor Signal [- Secondary]
46 - - Not Used
47 D-BU 1161 APP Sensor 1 Signal
48 D-GN 890 Fuel Tank Pressure Sensor Signal
49 L-BU 1162 APP Sensor 2 Signal
50-52 - - Not Used
53 D-GN/WH 459 A/C Compressor Clutch Relay Control
54 D-BU 473 High Speed Cooling Fan Relay Control
55 WH 1310 EVAP Canister Vent Solenoid Control
56 - - Not Used
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