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Test C: Power Mode Mismatch

WARNING: This page is about a different car, the 2001 Cadillac Seville. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Leave driver's door open during this test. This will disable retained accessory power mode, and eliminate this information from power mode parameter list.
  1. Connect scan tool to Data Link Connector (DLC). DLC is located below left side of instrument panel, near steering column. See Figure . Turn ignition switch to OFF position. Using scan tool, observe CLASS 2 POWER MODE parameter in DIAGNOSTIC CIRCUIT CHECK menu. If displayed power mode parameter matches actual ignition switch position, go to next step. If displayed power mode parameter does not match actual ignition switch position, go to step  6 .
  2. Turn ignition switch to OFF position, and ensure ignition key is in ignition switch. Using scan tool, observe CLASS 2 POWER MODE parameter in DIAGNOSTIC CIRCUIT CHECK menu. If displayed power mode parameter matches actual ignition switch position, go to next step. If displayed power mode parameter does not match actual ignition switch position, go to step  6 .
  3. Turn ignition switch to RUN position. Using scan tool, observe CLASS 2 POWER MODE parameter in DIAGNOSTIC CIRCUIT CHECK menu. If displayed power mode parameter matches actual ignition switch position, go to next step. If displayed power mode parameter does not match actual ignition switch position, go to step  6 .
    4. CAUTION: Engine may start during this procedure. Turn ignition switch to OFF position, after verifying power mode.
  4. Turn ignition switch to START position. Using scan tool, observe CLASS 2 POWER MODE parameter under DIAGNOSTIC CIRCUIT CHECK menu. If displayed power mode parameter matches actual ignition switch position, go to next step. If displayed power mode parameter does not match actual ignition switch position, go to step  6 .
  5. Turn ignition switch to ACC position. Using scan tool, observe CLASS 2 POWER MODE parameter in DIAGNOSTIC CIRCUIT CHECK menu. If displayed power mode parameter does not match actual ignition switch position, go to next step. If displayed power mode parameter matches actual ignition switch position, inspect for intermittents. See TROUBLE SHOOTING  .
    6. CAUTION: Engine may start during this procedure. Turn ignition switch to OFF position, after verifying power mode.
  6. Turn ignition switch to OFF position. Disconnect Dash Integration Module (DIM) harness connector. DIM is located behind right side of dash, near blower motor. See Figure . Turn and hold ignition switch to position that indicated incorrect power mode. Inspect for voltage by connecting a test light between ground and DIM harness connector ignition switch inputs. See POWER DISTRIBUTION article in WIRING DIAGRAMS. If voltage exists at only inputs specified for ignition switch, go to next step. If voltage does not exist at only inputs specified for ignition switch, go to step  8 .
    7. CAUTION: Engine may start during this procedure. Turn ignition switch to OFF position, after verifying power mode.
  7. Turn and hold ignition switch to position that indicated incorrect power mode. Inspect for voltage by connecting a test light between ground and DIM harness connector ignition switch inputs. See POWER DISTRIBUTION article in WIRING DIAGRAMS. If voltage does not exist on any inputs specified for ignition switch position, go to step  9 . If voltage exists on any inputs specified for ignition switch position, go to step  11 .
  8. Disconnect ignition switch harness connector. Inspect ignition switch input circuits for a short to voltage between ignition switch harness connector and DIM. Inspect ignition switch input circuits for a short between circuits. See POWER DISTRIBUTION article in WIRING DIAGRAMS. If problem does not exist, go to step  10 . If problem exists, repair ignition switch input circuits as necessary. After repair, go to step  14 .
  9. Disconnect ignition switch harness connector. Inspect ignition switch input circuits for an open between ignition switch and DIM. See POWER DISTRIBUTION article in WIRING DIAGRAMS. If problem does not exist, go to next step. If problem exists, repair ignition switch input circuits as necessary. After repair, go to step  14 .
  10. Inspect ignition switch harness connector for poor connections and terminal tension. If problem does not exist, go to step  12 . If problem exists, repair ignition switch harness connector as necessary. After repair, go to step  14 .
  11. Inspect DIM harness connector for poor connections and terminal tension. If problem does not exist, go to step  13 . If problem exists, repair DIM harness connector as necessary. After repair, go to step  14 .
  12. Replace ignition switch, then go to step  14 .
  13. Replace DIM. Program DIM. See DASH INTEGRATION MODULE  under PROGRAMMING. After repair, go to next step.
  14. Connect all disconnected components, if still disconnected. Using scan tool, observe CLASS 2 POWER MODE under DIAGNOSTIC CIRCUIT CHECK menu. Cycle ignition switch through all positions. If displayed power mode parameter does not match actual ignition switch position, repeat test beginning at step  1 .
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