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Home >> Cadillac >> 2006 >> DTS 4.6 9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.6L - Introduction (2 Of 2) >> Component Locator >> Engine Control Module (ECM) Connector End Views >> Engine Control Module (ECM) C3
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Engine Control Module (ECM) C3

Fig 1: ECM C3 Connector
GM1590596Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) Connector End Views

Connector Part Information 
  • OEM: 34566-3103
  • Service: 88988612
  • Description: TBD
Terminal Part Information 
  • Terminal/Tray: TBD
  • Core/Insulation Crimp: TBD
  • Release Tool/Test Probe: TBD
Engine Control Module (ECM) C3

Pin Wire Color Circuit No. Function
4 PU/WH 3210 HO2S Reference Voltage (Bank 2 Sensor 1)
7 OG 225 Generator Turn On Signal
8 L-GN 1652 Reverse Lockout Solenoid Control
9 WH/BK 436 AIR Pump Relay Control
15 L-GN/WH 3112 HO2S Heater Low Control [- Bank 1 Sensor 1]
18 BN 1174 Oil Level Switch Signal
21 L-BU 5514 Low Reference
23 OG/BK 469 Low Reference
26 WH/GY 6786 Engine:AIR_CONT_VLV_#2_LO_REF:_AIR_CONT_VLV_#2_LO_REF:D-GY:Engine:AIR_CONT_VLV_#2_LO_REF: Air Injection Reaction Control Valve #2 Low Reference
29 GY 23 Generator Field Duty Cycle Signal
33 TN 2501 High Speed GMLAN Serial Data Bus-
35 PK 2761 Low Reference
37 GY/BK 2700 A/C Pressure Sensor 5 Volt Reference
39 GY/WH 2704 5-Volt Reference
42 BN/WH 6790 Air Injection Reaction Control Valve #2 Volt Reference
46 GY/OG 1786 Park/Neutral Signal
48 D-GN/WH 428 EVAP Canister Purge Solenoid Control
49 D-GN 335 Low Speed Cooling Fan Relay Control
53 TN/BK 2500 High Speed GMLAN Serial Data Bus+
55 YE 410 ECT Sensor Signal
57 OG/WH 380 A/C Refrigerant Pressure Sensor Signal
59 L-GN/BK 432 MAP Sensor Signal
62 YE/GY 6788 Air Injection Reaction Control Valve #2 Control
65 YE/D-GN 231 Oil Pressure Switch Signal