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DTC B1542: Oil Temperature Circuit (Short To Ground): Testing

WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. If IPC diagnostic system check was performed, go to next step. If IPC diagnostic system check was not performed, go to INSTRUMENT PANEL CLUSTER (IPC) DIAGNOSTIC SYSTEM CHECK  .
  2. Using scan tool, select IPC data display. Monitor oil temperature data. If scan tool displays a value that is not between 14°F (-10°C) and 374°F (190°C), go to next step. If scan tool displays a value that is between 14°F (-10°C) and 374°F (190°C), go to DIAGNOSTIC AIDS  .
  3. Turn ignition off. Monitor oil temperature data. Disconnect oil temperature sensor connector. See COMPONENT LOCATIONS  . Turn ignition on. If scan tool displays a value less than 14°F (-10°C), go to next step. If scan tool displays a value greater than 14°F (-10°C), go to step  5 .
  4. Turn ignition off. Connect a 3-amp fused jumper wire between oil temperature connector terminals. Monitor oil temperature data. Turn ignition on. If scan tool displays a value greater than 374°F (190°C), go to step  8 . If scan tool does not display a value greater than 374°F (190°C), go to step  6 .
  5. Check for short to ground in Dark Green/White wire between IPC terminal A10 and oil temperature sensor connector terminal "B". See WIRING DIAGRAMS  . See Figure . If circuit is okay, go to step  9 . If faulty circuit is found, repair as necessary and go to step  12 .
  6. Check for short to voltage in Dark Green/White wire between IPC terminal A10 and oil temperature sensor connector terminal "B". See WIRING DIAGRAMS  . If circuit is okay, go to next step. If faulty circuit is found, repair as necessary and go to step  12 .
  7. Check for open or high resistance in Black wire between IPC terminal B8 and oil temperature sensor connector terminal "A". If circuit is okay, go to step  9 . If faulty circuit is found, repair as necessary and go to step  12 .
  8. Check for poor connections at oil temperature sensor connector terminals. If connections are okay, go to step  10 . If faulty connections are found, repair as necessary and go to step  12 .
  9. Check for poor connections at IPC connector terminals. If connections are okay, go to step  11 . If faulty connections are found, repair as necessary and go to step  12 .
  10. Replace oil temperature sensor. After repairs, go to step  12 .
  11. Replace IPC. See INSTRUMENT PANEL CLUSTER (IPC)  under REMOVAL & INSTALLATION. After repairs, go to next step.
  12. Turn ignition off. Reinstall all components and connectors. Turn ignition on. Clear DTCs. Wait 5 seconds and check for DTCs. If DTC B1542 resets as current, go to step  2 . If DTC B1542 is not current, system is operating properly.
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