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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Engine Controls - System & Component Testing - 6.6L) >> Computerized Engine Controls >> Engine Control Module & Fuel Injector Control Module >> ECM/FICM Harness Resistance
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ECM/FICM Harness Resistance

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch to LOCK position. Disconnect ECM/FICM and appropriate component harness connectors. Check for open or short circuits between appropriate ECM/FICM harness connector terminal and appropriate component harness connector terminal. If harness is open or shorted, repair as necessary.

Fig 1: Identifying ECM Connector C1 Terminals (1 Of 3)
G00169566Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying ECM Connector C1 Terminals (2 Of 3)
G00169567Courtesy of GENERAL MOTORS CORP.
Fig 3: Identifying ECM Connector C1 Terminals (3 Of 3)
G00169568Courtesy of GENERAL MOTORS CORP.
Fig 4: Identifying ECM Connector C2 Terminals (1 Of 3)
G00169569Courtesy of GENERAL MOTORS CORP.
Fig 5: Identifying ECM Connector C2 Terminals (2 Of 3)
G00169570Courtesy of GENERAL MOTORS CORP.
Fig 6: Identifying ECM Connector C2 Terminals (3 Of 3)
G00169571Courtesy of GENERAL MOTORS CORP.
Fig 7: Identifying Fuel Injector Control Module Connector Terminals (1 Of 2)
G00169572Courtesy of GENERAL MOTORS CORP.
Fig 8: Identifying Fuel Injector Control Module Connector Terminals (2 Of 2)
G00169573Courtesy of GENERAL MOTORS CORP.
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