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Home >> Cadillac >> 2002 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 209 (Engine Controls - System & Component Testing) >> Computerized Engine Controls >> Powertrain Control Module >> PCM Harness Resistance
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PCM Harness Resistance

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Identifying PCM Connector C1 Terminals (1 Of 3)
G00121119Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying PCM Connector C1 Terminals (2 Of 3)
G00121120Courtesy of GENERAL MOTORS CORP.
Fig 3: Identifying PCM Connector C1 Terminals (3 Of 3)
G00121121Courtesy of GENERAL MOTORS CORP.
Fig 4: Identifying PCM Connector C2 Terminals (1 Of 3)
G00121122Courtesy of GENERAL MOTORS CORP.
Fig 5: Identifying PCM Connector C2 Terminals (2 Of 3)
G00121123Courtesy of GENERAL MOTORS CORP.
Fig 6: Identifying PCM Connector C2 Terminals (3 Of 3)
G00121124Courtesy of GENERAL MOTORS CORP.
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