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Code 15

WARNING: This page is about a different car, the 1994 Lexus LS 400. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: During testing, if codes other than Code 15 are displayed, disregard them.
  1. Disconnect negative battery cable. Wait at least 90 seconds. Remove steering wheel pad. See STEERING WHEEL PAD & SPIRAL CABLE  under REMOVAL & INSTALLATION. Disconnect passenger-side air bag harness connector, accessible through finish plate in glove box. See Figure. Disconnect seat belt pretensioner connectors.
  2. Disconnect center air bag sensor connector. At center air bag sensor connector (harness side), measure resistance between terminals +SR and -SR, and terminals +SL and -SL. See Figure. If resistance is 755-885 ohms, go to next step. If resistance is not 755-885 ohms, go to step 7).
  3. Reconnect negative battery cable. Turn ignition switch to ON position. At center air bag sensor connector (harness side), measure voltage between body ground and terminals +SR and +SL. If less than .1 volt is present, go to next step. If .1 volt or more is present, replace harness between center air bag sensor and front air bag sensor.
  4. Disconnect negative battery cable. Wait at least 90 seconds. Reconnect center air bag sensor connector. Connect jumper wire between terminals of spiral cable upper connector, passenger-side air bag connector and both seat belt pretensioner connectors (harness side of each connector). Reconnect negative battery cable. Wait at least 2 seconds.
  5. Turn ignition switch to ACC or ON position. Wait at least 20 seconds. Clear codes. See CLEARING CODES  under SELF-DIAGNOSTIC SYSTEM. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ACC or ON position. Wait at least 20 seconds.
  6. Connect jumper wire between terminals Tc and E1 of DLC. See Figure. If Code 15 is displayed, replace center air bag sensor. If Code 15 is not displayed, check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT  under DIAGNOSIS & TESTING.
  7. Disconnect left front air bag sensor connector. At left front air bag sensor connector (sensor side), measure resistance between terminals +S and +A (755-885 ohms), +S and -S (infinite ohms), and -S and -A (less than one ohm). See Figure. Repeat procedure on right front air bag sensor.
  8. If resistance is not as specified, replace front air bag sensor. If resistance is as specified, disconnect center air bag sensor connector. At center air bag sensor connector (harness side), connect jumper wires between terminals +SR and -SR, and terminals +SL and -SL. See Figure.
  9. At left front air bag sensor connector (harness side), measure resistance between terminals +S and -S. See Figure. Repeat procedure on right front air bag sensor. If resistance is less than one ohm, replace front air bag sensor. If resistance is one ohm or more, replace harness between center air bag sensor and front air bag sensor.
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