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Home >> Cadillac >> 1996 >> DeVille Base >> Repair and Diagnosis >> Suspension >> Electronic Suspension >> Suspension - Electronic Road Sensing >> Testing & Diagnosis >> Code RS0038: ELC Exhaust Solenoid Short To Ground/Open Circuit

Code RS0038: ELC Exhaust Solenoid Short To Ground/Open Circuit

  1. Clear codes. Wait 30 seconds (no vehicle speed). Display codes. If Code RS0038 is set, go to next step. If Code RS0038 is not set, go to NOTES ON INTERMITTENTS  under SELF-DIAGNOSTICS.
  2. Turn ignition off. Remove and check 30-amp ELC fuse in trunk compartment fuse block. Fuse is hot at all times. If fuse is blown, go to next step. If fuse is okay, go to step 7).
  3. Disconnect ELC compressor assembly connector. Check continuity between exhaust solenoid power supply circuit terminal (Orange wire) of ELC compressor assembly harness connector and ground. See WIRING DIAGRAMS  . If continuity does not exist, go to next step. If continuity exists, repair short to ground in Orange wire. Replace fuse. Reconnect ELC compressor assembly connector.
  4. Check continuity between exhaust solenoid control circuit terminal (Gray wire) of ELC compressor assembly harness connector and ground. See WIRING DIAGRAMS  . If continuity does not exist, go to next step. If continuity exists, repair short to ground in Gray wire. Replace fuse. Reconnect ELC compressor assembly connector.
  5. Check continuity between the following terminals of ELC compressor assembly connector (component side). See WIRING DIAGRAMS  .
    • Exhaust solenoid control circuit (Gray wire) and ground.
    • Exhaust solenoid control circuit (Gray wire) and ground circuit (Black wire).
    • Exhaust solenoid power supply circuit (Orange wire) and ground.
    • Exhaust solenoid power supply circuit (Orange wire) and ground circuit (Black wire).

    If continuity does not exist on all terminals, go to next step. If continuity exists on any terminals, replace ELC compressor assembly and all related air lines. Replace fuse.

  6. Check ELC compressor assembly connector for debris or corrosion. Reconnect ELC compressor assembly connector. Check for low battery voltage. Replace fuse. Clear codes. Wait 30 seconds (no vehicle speed). Remove and check 30-amp ELC fuse in trunk compartment fuse block. If fuse is okay, problem no longer exists. If fuse is blown, replace ELC compressor assembly and all related air lines. Replace fuse.
  7. Using DVOM, measure voltage between 30-amp ELC fuse terminal (Red wire) of trunk compartment fuse block and ground. See WIRING DIAGRAMS  . If voltage is present, go to next step. If voltage is not present, check 60-amp BODY 2 fuse in left maxifuse block located in front of left strut tower, in engine compartment.
  8. Reinstall 30-amp ELC fuse. Disconnect 24-pin RSS control module connector C2. Disconnect ELC compressor assembly connector. Using DVOM, measure voltage between exhaust solenoid power supply circuit terminal (Orange wire) of ELC compressor assembly harness connector and ground. See WIRING DIAGRAMS  . If voltage is present, go to next step. If voltage is not present, repair open in Orange wire.
  9. Using DVOM, measure resistance between exhaust solenoid control circuit terminal (Gray wire) and exhaust solenoid power supply circuit terminal (Orange wire) of ELC compressor assembly connector (component side). See WIRING DIAGRAMS  . If resistance is 25-35 ohms, go to next step. If resistance is less than 25 ohms or more than 35 ohms, replace ELC compressor assembly and all related air lines.
  10. Check continuity between exhaust solenoid control circuit terminal (Gray wire) and ground circuit terminal (Black wire) of ELC compressor assembly connector (component side). See WIRING DIAGRAMS  . If continuity does not exist, go to next step. If continuity exists, replace ELC compressor assembly and all related air lines.
  11. Check continuity between exhaust solenoid control circuit terminal (Gray wire) of ELC compressor assembly harness connector and ground. See WIRING DIAGRAMS  . If continuity does not exist, go to next step. If continuity exists, repair short to ground in Gray wire. Reconnect ELC compressor assembly connector.
  12. Check ELC compressor assembly connector for debris or corrosion. Reconnect ELC compressor assembly connector. Using DVOM, measure voltage between exhaust solenoid control circuit terminal (Gray wire) of RSS control module harness connector C2 and ground. See WIRING DIAGRAMS  . If voltage is present, go to next step. If voltage is not present, repair open in Gray wire.
  13. Check RSS control module connector for debris or corrosion. Reconnect RSS control module connector. Clear codes. Wait 30 seconds (no vehicle speed). If Code RS0038 is set, go to next step. If Code RS0038 is not set, check for intermittent open or short to ground in Gray wire, and Orange wire.
  14. Replace RSS control module. Calibrate NEW RSS control module. See CALIBRATING RSS CONTROL MODULE  under ADJUSTMENTS.
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