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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 269 (Air Bag Restraint Systems) >> Diagnostic Tests >> DTC 58/B1835, 58/B1836, 58/B1837, 58/B1838: Right Side Curtain Air Bag Squib Circuit Short, Open, Short To Ground Or Short To Battery >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch to LOCK position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. If using Lexus hand-held tester, retrieve 5 digit DTC. See RETRIEVING AIR BAG SYSTEM DTCS USING LEXUS HAND-HELD TESTER  under DIAGNOSTICS. If DTC B1835 is retrieved, go to next step. If DTC B1836 is retrieved, go to step  4. If DTC B1837 is retrieved, go to step  5. If DTC B1838 is retrieved, go to step  6. If using diagnosis check wire, retrieve 2 digit DTC. See RETRIEVING AIR BAG SYSTEM DTCS USING DIAGNOSIS CHECK WIRE  under DIAGNOSTICS. If DTC 57 is retrieved, go to step  7.
  2. Inspect right side curtain air bag module connector for disengaged lock button or deformed or damaged lock claw. If connectors are okay, go to next step. If connectors are not okay, replace right side curtain air bag module. See SIDE CURTAIN AIR BAG MODULE  under REMOVAL & INSTALLATION.
  3. Release short spring mechanism on air bag sensor assembly connector A32. See RELEASING SHORTING SPRING  under DIAGNOSTICS. Measure resistance between Yellow/Violet wire (circuit ICP+) and Yellow/Orange wire (circuit ICP-) on harness side of left side curtain air bag module connector. See WIRING DIAGRAMS . If resistance is less than one megohm, replace wire harness between right side curtain air bag module and air bag sensor assembly. If resistance is more than one megohm, go to step  9.
  4. Measure resistance between Yellow/Violet wire (circuit ICP+) and Yellow/Orange wire (circuit ICP-) on harness side of left side curtain air bag module connector. See WIRING DIAGRAMS . If resistance is less than one ohm, go to step  10. If resistance is more than one ohm, replace wire harness between right side curtain air bag module and air bag sensor assembly.
  5. Measure resistance between ground and Yellow/Violet wire (circuit ICP+) on harness side of left side curtain air bag module connector. See WIRING DIAGRAMS . Measure resistance between ground and Yellow/Orange (circuit ICP-) wire on harness side of left side curtain air bag module connector. If resistance is more than one megohm, go to step  10. If resistance is less than one megohm, replace wire harness between right side curtain air bag module and air bag sensor assembly.
  6. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Measure voltage between ground and Yellow/Violet wire (circuit ICP+) on harness side of left side curtain air bag module connector. See WIRING DIAGRAMS . Measure voltage between ground and Yellow/Orange wire (circuit ICP-) on harness side of left side curtain air bag module connector. If voltage is less than one volt, go to step  10. If voltage is more than one volt, replace wire harness between right side curtain air bag module and air bag sensor assembly.
  7. Inspect right side curtain air bag module connector for disengaged lock button or deformed or damaged lock claw. If connectors are okay, go to next step. If connectors are not okay, replace right side curtain air bag module. See SIDE CURTAIN AIR BAG MODULE  under REMOVAL & INSTALLATION.
  8. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Measure voltage between ground and Yellow/Violet wire (circuit ICP+) on harness side of left side curtain air bag module connector. See WIRING DIAGRAMS . Measure voltage between ground and Yellow/Orange wire (circuit ICP-) on harness side of left side curtain air bag module connector. Voltage should be less than one volt. Turn ignition switch to LOCK position. Disconnect negative battery cable and wait at least 90 seconds. Measure resistance between Yellow/Violet wire and Yellow/Orange wire on harness side of left side curtain air bag module connector. Resistance should be less than one ohm. Measure resistance between ground and Yellow/Violet wire on harness side of left side curtain air bag module connector. Measure resistance between ground and Yellow/Orange wire on harness side of left side curtain air bag module connector. Resistance should be more than one megohm. Release short spring mechanism on air bag sensor assembly connector A32. See RELEASING SHORTING SPRING  under DIAGNOSTICS. Measure resistance between Yellow/Violet wire and Yellow/Orange wire on harness side of left side curtain air bag module connector. Resistance should be more than one megohm. If voltage and resistance readings are normal, go to next step. If voltage and resistance readings are not normal, replace wire harness between right side curtain air bag module and air bag sensor assembly.
  9. Replace right side curtain air bag module. See SIDE CURTAIN AIR BAG MODULE  under REMOVAL & INSTALLATION. Reconnect air bag sensor assembly harness connectors. Turn ignition switch to ON position. Wait at least 60 seconds. Clear DTCs. See CLEARING AIR BAG SYSTEM DTCS USING DIAGNOSIS CHECK WIRE  under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 60 seconds. Retrieve DTCs. If DTC 57 is displayed, replace air bag sensor assembly. See AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION. If DTC 57 is not displayed, test is complete.
  10. Reconnect air bag sensor assembly connectors. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 60 seconds. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 60 seconds. Retrieve DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS. If DTC B1835 is displayed, replace air bag sensor assembly. See AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION. If DTC B1835 is not displayed, go to step  12.
  11. If sent here from step  5, turn ignition switch to LOCK position. Disconnect negative battery cable and wait at least 90 seconds. If sent here from any step, reconnect air bag sensor assembly connectors. Connect jumper wire between Yellow/Violet wire and Yellow/Orange wire on harness side of left side curtain air bag module connector. See WIRING DIAGRAMS . Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 60 seconds. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 60 seconds. Retrieve DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS. If DTCs B1836, B1837 or B1838 are displayed, replace air bag sensor assembly. See AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION. If DTC B1836, B1837 or B1838 are not displayed, go to next step.
  12. Turn ignition switch to LOCK position. Disconnect negative battery cable and wait at least 90 seconds. If sent here from step  9, remove jumper wire. If sent here from any step, connect right side air bag module harness connectors. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 60 seconds. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 60 seconds. Retrieve DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS. If DTCs B1835, B1836, B1837 or B1838 are displayed, replace right side curtain air bag module. See SIDE CURTAIN AIR BAG MODULE  under REMOVAL & INSTALLATION. If DTC B1835, B1836, B1837 or B1838 are not displayed, ensure air bag sensor assembly is in check mode. See CHECK MODE PROCEDURE  under DIAGNOSTICS. Check for intermittent air bag system fault. See AIR BAG WARNING LIGHT INTERMITTENT .
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