PCM Harness Resistance

Turn ignition switch to LOCK position. Disconnect PCM and related component harness connectors. Check for open or short circuits between PCM harness connector terminal and component harness connector terminal. See Fig 1. See WIRING DIAGRAMS article. If harness is open or shorted, repair as necessary.

Fig 1: Identifying Powertrain Control Module Harness Connector Terminals (Except Saturn 3.0L)

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Fig 2: Identifying Powertrain Control Module Harness Connector Terminals (J1) (Saturn 1.9L)

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Fig 3: Identifying Powertrain Control Module Harness Connector Terminals (J2) (Saturn 1.9L)

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Fig 4: Identifying Powertrain Control Module Harness Connector Terminals (J1) (Saturn 3.0L)

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Fig 5: Identifying Powertrain Control Module Harness Connector Terminals (J2) (Saturn 3.0L)

Courtesy of GENERAL MOTORS CORP.