FICM/PCM Harness Resistance

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

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

Fig 1: Identifying Fuel Injector Control Module Connector Terminals (1 Of 2)

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Fig 2: Identifying Fuel Injector Control Module Connector Terminals (2 Of 2)

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Fig 3: Identifying PCM Connector C1 Terminals - Chevy Express & Savana (1 Of 3)

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Fig 4: Identifying PCM Connector C1 Terminals - Chevy Express & Savana (2 Of 3)

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Courtesy of GENERAL MOTORS CORP.

Fig 5: Identifying PCM Connector C1 Terminals - Chevy Express & Savana (3 Of 3)

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Fig 6: Identifying PCM Connector C2 Terminals - Chevy Express & Savana (1 Of 3)

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Fig 7: Identifying PCM Connector C2 Terminals - Chevy Express & Savana (2 Of 3)

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Courtesy of GENERAL MOTORS CORP.

Fig 8: Identifying PCM Connector C2 Terminals - Chevy Express & Savana (3 Of 3)

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Fig 9: Identifying PCM Connector C1 Terminals - Sierra & Silverado (1 Of 3)

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Fig 10: Identifying PCM Connector C1 Terminals - Sierra & Silverado (2 Of 3)

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Fig 11: Identifying PCM Connector C1 Terminals - Sierra & Silverado (3 Of 3)

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Fig 12: Identifying PCM Connector C2 Terminals - Sierra & Silverado (1 Of 3)

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Fig 13: Identifying PCM Connector C2 Terminals - Sierra & Silverado (2 Of 3)

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Fig 14: Identifying PCM Connector C2 Terminals - Sierra & Silverado (3 Of 3)

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Courtesy of GENERAL MOTORS CORP.