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DTC B2607: Seat Rear Horizontal Position Sensor Failure (SCM): 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 diagnostic system check was performed, go to next step. If diagnostic system check has not been performed, go to DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Using scan tool, display SCM DTCs. If DTC B2607 is set as history, go to next step. If DTC B2607 is not set as history, go to step  6 .
  3. Using scan tool, monitor SCM data display for left seat front vertical position sensor. Attempt to operate seat forward and rearward using power seat switch. If scan tool does not display 0.10-4.78 volts, go to next step. If scan tool displays 0.10-4.78 volts, go to step  12 .
  4. Turn ignition off. Disconnect left seat lower motor connector C2. Turn ignition on. Using DVOM, measure voltage between left seat lower motor connector C2 terminal "A" (Purple wire) and ground. See Figure . If voltage is 4.0-5.5 volts, go to next step. If voltage is not 4.5-5.5 volts, go to step  7 .
  5. Measure voltage between left seat lower motor connector C2 terminals "A" (Purple wire) and "C" (Black wire). If voltage is not 4.0-5.5 volts, go to step  8 . If voltage is 4.0-5.5 volts, go to step  10 .
  6. Turn ignition off. Disconnect left seat lower motor connector C2. Turn ignition on. Using DVOM, measure voltage between left seat motor connector C2 terminal "B" (Dark Green wire) and ground while operating seat forward and rearward using power seat switch. If voltage is not 3.5-5.5 volts, go to step  9 . If voltage is 3.5-5.5 volts, go to step  10 .
  7. Check for open, short to ground or short to voltage in Purple wire between left seat lower motor connector C2 and SCM connector C1. If circuit is okay, go to step  11 . If faulty circuit is found and repaired, go to step  14 .
  8. Check for open or short to voltage in Black wire between left seat lower motor connector C2 and SCM connector C1. If circuit is okay, go to step  11 . If faulty circuit is found and repaired, go to step  14 .
  9. Check for open, short to ground or short to voltage in Dark Green wire between left seat lower motor connector C2 and SCM connector C1. If circuit is okay, go to step  11 . If faulty circuit is found and repaired, go to step  14 .
  10. Replace left seat adjuster motor assembly. See POWER SEATS - CORVETTE article. After repairs, go to step  14 .
  11. Replace SCM. See SEAT CONTROL MODULE  under REMOVAL & INSTALLATION. After repairs, go to step  14 .
  12. Check left seat horizontal position sensor wiring and connectors for intermittent malfunctions. See WIRING DIAGRAMS  . If problem is not found, go to next step. If problem circuit or connector is repaired, go to step  14 .
  13. Turn ignition off. Reconnect all disconnected components and connectors. Turn ignition on and clear any DTCs. Wait 2 seconds. If DTC B2607 sets as history, go to step  11 . If DTC B2607 does not set as history, system is okay at this time.
  14. Turn ignition off. Reconnect all disconnected components and connectors. Turn ignition on and clear any DTCs. If DTC resets, go to DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
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