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HOMESERVICE MANUALSACURA20043.5RLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 33 (AIR BAG RESTRAINT SYSTEMS)DIAGNOSTIC TESTSDTC 9-4
2004 Acura 3.5RL

DTC 9-4

2004 Acura 3.5RLSECTION DTC 9-4
WARNING: This page is about a different car, the 2002 Acura 3.5RL. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Accidental air bag deployment is possible. Personal injury may result. Avoid bumping SRS unit if ignition is on, or has been turned off for less than 3 minutes.
  1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Check connections at passenger-side tension reducer solenoid connection, passenger-side seat belt buckle switch and right-side wire harness 3-pin connectors, right-side wire harness and main wire harness 24-pin connectors, main wire harness and SRS main harness 8-pin connectors, and SRS main harness 18-pin connectors. See Figure, Figure, Figure, Fig 1 & Fig 2 . If connections are okay, go to next step. If connections are faulty, reconnect securely.
  2. Buckle passenger-side seat belt. Erase DTC memory. See ERASING DIAGNOSTIC TROUBLE CODE MEMORY . Read DTC. See DIAGNOSTIC TROUBLE CODE (DTC) . If DTC 9-4 is indicated, go to next step. If DTC 9-4 is not indicated, go to step  6.
  3. Unbuckle passenger-side seat belt. Erase DTC memory. See ERASING DIAGNOSTIC TROUBLE CODE MEMORY . Read DTC. See DIAGNOSTIC TROUBLE CODE (DTC) . If DTC 9-4 is indicated, go to next step. If DTC 9-4 is not indicated, go to step  5.
  4. Disconnect air bag connectors. See Figure, Figure & Figure . Disconnect SRS main harness 18-pin connector from SRS unit. See Figure. Measure resistance between SRS main harness 18-pin connector terminals No. 12 and 13. If resistance is less than one megohm, go to step  19. If resistance is one megohm or greater, go to step  17.
  5. Buckle passenger-side seat belt. Disconnect passenger-side seat belt buckle switch. See Fig 1. Measure resistance between passenger-side seat belt buckle switch 3-pin connector terminals No. 1 and 3. If resistance is one ohm or less, go to step  22. If resistance is greater than one ohm, replace passenger-side seat belt buckle assembly.
  6. Unbuckle passenger-side seat belt. Erase DTC memory. See ERASING DIAGNOSTIC TROUBLE CODE MEMORY . Read DTC. See DIAGNOSTIC TROUBLE CODE (DTC) . If DTC 9-4 is indicated, go to next step. If DTC 9-4 is not indicated, there is an intermittent failure. See TROUBLESHOOTING INTERMITTENT FAILURES .
  7. Disconnect passenger-side tension reducer solenoid connector. See Figure. Erase DTC memory. See ERASING DIAGNOSTIC TROUBLE CODE MEMORY . Read DTC. See DIAGNOSTIC TROUBLE CODE (DTC) . If DTC 9-4 is not indicated, go to next step. If DTC 9-4 is indicated, go to step  9.
  8. Check fuse No. 13 (7.5-amp) in underdash fuse/relay box. See Figure. If fuse is okay, replace passenger-side tension reducer solenoid. If fuse is blown, repair short to ground in fuse No. 13 circuit and recheck system operation.
  9. Disconnect air bag connectors. See Figure, Figure & Figure . Disconnect SRS main harness 18-pin connector from SRS unit. See Figure. Measure resistance between SRS main harness 18-pin connector terminal No. 12 and ground. If resistance is one megohm or greater, go to next step. If resistance is less than one megohm, go to step  12.
  10. Measure resistance between SRS main harness 18-pin connector terminal No. 13 and ground. See Figure. If resistance is greater than one ohm, go to next step. If resistance is one ohm or less, replace SRS unit. See SRS UNIT  under REMOVAL & INSTALLATION.
  11. Disconnect main wire harness 8-pin connector from SRS main harness. See Figure. Measure resistance between main wire harness 8-pin connector terminal No. 2 and ground. If resistance is greater than one ohm, go to step  14. If resistance is one ohm or less, replace SRS main harness.
  12. Disconnect right-side wire harness 3-pin connector. See Fig 1. Measure resistance between SRS main harness 18-pin connector terminal No. 13 and ground. See Figure. If resistance is less than one megohm, go to next step. If resistance is one megohm or greater, replace passenger-side seat belt buckle.
  13. Disconnect right-side wire harness 24-pin connector. See Fig 2. Measure resistance between SRS main harness 18-pin connector terminal No. 13 and ground. See Figure. If resistance is less than one megohm, go to step  16. If resistance is one megohm or greater, replace right-side wire harness.
  14. Disconnect right-side wire harness 24-pin connector. See Fig 2. Measure resistance between right-side wire harness 24-pin connector terminal No. 14 and ground. If resistance is greater than one ohm, go to next step. If resistance is one ohm or less, replace main wire harness.
  15. Disconnect right-side wire harness 3-pin connector from passenger-side seat belt buckle switch. See Fig 1. Measure resistance between seat belt buckle switch 3-pin connector terminals No. 1 and 2. See Figure. If resistance is less than one ohm, replace right-side wire harness. If resistance is one ohm or greater, replace passenger-side seat belt buckle.
  16. Disconnect main wire harness 8-pin connector from SRS main harness. See Figure. Measure resistance between SRS main harness 18-pin connector terminal No. 13 and ground. See Figure. If resistance is less than one megohm, replace SRS main harness. If resistance is one megohm or greater, replace main wire harness.
  17. Unbuckle passenger-side seat belt. Measure resistance between SRS main harness 18-pin connector terminal No 13 and ground. If resistance is greater than one ohm, go to next step. If resistance is one ohm or less, replace SRS unit. See SRS UNIT  under REMOVAL & INSTALLATION.
  18. Disconnect passenger-side belt buckle switch 3-pin connector. See Fig 1. Measure resistance between passenger-side seat belt buckle switch 3-pin connector terminals No. 1 and 2. Resistance should be one ohm or less. Measure resistance between passenger-side seat belt buckle switch 3-pin connector terminals No. 1 and 3. Resistance should be one megohm or greater. If resistances are within acceptable ranges, replace right-side wire harness. If resistances are not within acceptable ranges, replace passenger-side seat belt buckle.
  19. Disconnect right-side wire harness 3-pin connector from passenger-side seat belt buckle switch. See Fig 1. Measure resistance between SRS main harness 18-pin connector terminals No. 12 and 13. See Figure. If resistance is less than one megohm, go to next step. If resistance is one megohm or greater, replace passenger-side seat belt buckle.
  20. Disconnect main wire harness 24-pin connectors. See Fig 2. Measure resistance between SRS main harness 18-pin connector terminals No. 12 and 13. See Figure. If resistance is less than one megohm, go to next step. If resistance is one megohm or greater, replace right-side wire harness.
  21. Disconnect main wire harness 8-pin connector from SRS main harness. See Figure. Measure resistance between SRS main harness 18-pin connector terminals No. 12 and 13. See Figure. If resistance is less than one megohm, replace SRS main harness. If resistance is one megohm or greater, replace main wire harness.
  22. Measure resistance between passenger-side seat belt buckle switch 3-pin connector terminal No. 2 and ground. See Fig 1. If resistance is one megohm or greater, go to next step. If resistance is less than one megohm, replace passenger-side seat belt buckle.
  23. Disconnect passenger-side tension reducer solenoid connector. See Figure. Disconnect air bag connectors. See Figure, Figure & Figure . Disconnect SRS main harness 18-pin connector from SRS unit. See Figure. Measure resistance between SRS main harness 18-pin connector terminal No. 13 and ground. If resistance is on megohm or greater, go to next step. If resistance is less than one megohm, go to step  27.
  24. Measure resistance between SRS main harness 18-pin connector terminal No. 12 and right-side wire harness 3-pin connector terminal No. 3. See Figure & Fig 2 . If resistance is greater than one ohm, go to next step. If resistance is one ohm or less, replace SRS unit. See SRS UNIT  under REMOVAL & INSTALLATION.
  25. Disconnect right-side wire harness 24-pin connector. See Fig 2. Measure resistance between SRS main harness 18-pin connector terminal No. 12 and main wire harness 24-pin connector terminal No. 15. See Figure & Fig 2 . If resistance is greater than one ohm, go to next step. If resistance is one ohm or less, replace right-side wire harness.
  26. Disconnect main wire harness 8-pin connector from SRS main harness. See Fig 1. Measure resistance between SRS main harness 18-pin connector terminal No. 12 and SRS main harness 8-pin connector terminal No. 3. See Figure & Fig 1 . If resistance is one ohm or less, replace main wire harness. If resistance is greater than one ohm, replace SRS main harness.
  27. Disconnect right-side wire harness 24-pin connector. See Fig 2. Measure resistance between SRS main harness 18-pin connector terminal No. 13 and ground. See Figure. If resistance is less than one megohm, go to next step. If resistance is one megohm or greater, replace right-side wire harness.
  28. Disconnect main wire harness 8-pin connector from SRS main harness. See Fig 1. Measure resistance between SRS main harness 18-pin connector terminal No. 13 and ground. See Figure. If resistance is less than one megohm, replace SRS main harness. If resistance is one megohm or greater, replace main wire harness.
Fig 1: Locating Right-side Wire Harness & Passenger-side Seat Belt Buckle Switch Connectors
G99H00213Courtesy of AMERICAN HONDA MOTOR CO., INC.
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