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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 262 (Air Bag Restraint Systems) >> Diagnostic Tests >> DTC 55/B1187: Short To Ground In Passenger-Side Air Bag Squib Module Circuit >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Toyota Matrix and 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect passenger-side air bag module harness connector. See Figure. Access air bag sensor assembly and disconnect harness connector A13. See AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION. See Figure. Measure resistance between ground and Yellow/Gray wire on air bag sensor assembly side of passenger-side air bag module harness connector. See WIRING DIAGRAMS . If resistance is less than one megohm, repair or replace harness or connector between passenger-side air bag module and air bag sensor assembly. If resistance is more than one megohm, go to next step.
  2. Reconnect air bag sensor assembly connector A13 to air bag sensor assembly. Connect jumper wire between Yellow/Gray wire and Yellow/Pink wire on air bag sensor assembly side of passenger-side air bag module harness connector. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. See CLEARING CODES  under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Retrieve DTCs. See RETRIEVING CODES  under DIAGNOSTICS. If DTC 55/B1187 is not displayed, go to next step. If DTC 55/B1187 is displayed, replace air bag sensor assembly.
  3. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Reconnect passenger-side air bag module harness connector. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. See CLEARING CODES  under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Retrieve DTCs. See RETRIEVING CODES  under DIAGNOSTICS. If DTC 55/B1187 is not displayed, go to next step. If DTC 55/B1187 is displayed, replace passenger-side air bag module. See DUAL-STAGE PASSENGER-SIDE AIR BAG MODULE  under REMOVAL & INSTALLATION.
  4. Check for intermittent air bag system fault. See AIR BAG WARNING LIGHT INTERMITTENT . If AIR BAG warning light illuminates while checking for intermittent fault, go to step  1. If AIR BAG warning light does not illuminate while checking for intermittent fault, replace all air bag system components, including wiring harness. See REMOVAL & INSTALLATION .
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