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Home >> Saturn >> 2000 >> LS2 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0230: Fuel Pump Relay Control Circuit >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Attempt to start engine. If engine starts, problem is intermittent. See DIAGNOSTIC AIDS . If engine does not start, go to next step.
  3. Check ENG CNTRL 3 fuse. Replace as necessary. Remove fuel pump relay located in left passenger compartment fuse/relay block. Connect a test light between relay cavities No. 85 (Orange wire) and No. 86 (Light Green wire) in fuse/relay block. Using scan tool, command fuel pump on. If test light does not illuminate, go to next step. If test light illuminates, check for terminal tightness at fuse/relay block. Repair as necessary. If terminals are okay, replace fuel pump relay.
  4. Turn ignition on, with engine off. Connect test light between ground and relay cavity No. 85 (Orange wire) in fuse/relay block. If test light does not illuminate, repair open in circuit (Orange wire). If test light illuminates, check for open in circuit (Orange wire). Repair as necessary. If circuit is okay, check for terminal tightness at fuse/relay block. Repair as necessary. If terminals are okay, replace ECM.
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