LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Air Bag Restraint Systems) >> Diagnostic Tests >> DTC 33/B1141: Left-Head Impact/Side Air Bag Sensor Assembly Malfunction >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. See CLEARING DTCS  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 DTCS  under DIAGNOSTICS. If DTC 33/B1141 is not displayed, system is functioning normally at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT . If DTC 33/B1141 is displayed, go to next step.
  2. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Access air bag sensor assembly. See AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION. Ensure air bag sensor assembly harness connectors are properly connected. If air bag sensor assembly harness connectors are not properly connected, reconnect connectors. If air bag sensor assembly harness connectors are properly connected, go to next step.
  3. Access left head impact/side air bag sensor assembly. See HEAD IMPACT/SIDE AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION. Ensure left-head impact/side air bag sensor assembly harness connector is properly connected. If left head impact/side air bag sensor assembly harness connector is not properly connected, reconnect connector. If left head impact/side air bag sensor assembly harness connector is properly connected, go to next step.
  4. Disconnect left head impact/side air bag sensor assembly harness connector. Disconnect air bag sensor assembly harness connector A23. Connect jumper wire between Pink/Blue wire (circuit VUPL) and Gray/Blue wire (circuit ESL) on harness side of left head impact/side air bag sensor assembly harness connector. Measure resistance between air bag sensor assembly harness connector A23, terminals No. 16 and 18. See Figure. If resistance is less than one ohm, go to next step. If resistance is more than one ohm, repair or replace harness or connector between left-head impact/side air bag sensor assembly and air bag sensor assembly.
  5. Remove jumper wire from left head impact/side air bag sensor assembly harness connector. Measure resistance between ground and air bag sensor assembly harness connector A23, terminal No. 16 If resistance is more than one megohm, go to next step. If resistance is less than one megohm, repair or replace harness or connector between left-head impact/side air bag sensor assembly and air bag sensor assembly.
  6. Measure resistance between air bag sensor assembly harness connector A23, terminals No. 16 and 18. If resistance is more than one megohm, go to next step. If resistance is less than one megohm, repair or replace harness or connector between left-head impact/side air bag sensor assembly and air bag sensor assembly.
  7. Connect negative battery cable. Turn ignition switch to ON position. Measure voltage between ground and air bag sensor assembly harness connector A23, terminal No. 16. If voltage is less than one volt, go to next step. If voltage is more than one volt, repair or replace harness or connector between left-head impact/side air bag sensor assembly and air bag sensor assembly.
  8. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Remove right and left head impact/side air bag sensors. Install right head impact/side air bag sensor on left side and connect to left head impact/side air bag sensor harness connector. Install left head impact/side air bag sensor on right side and connect to right head impact/side air bag sensor harness connector. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Retrieve DTCs. If DTC 33/B1141 and 32/B1140 are not displayed, go to next step. If DTC 32/B1140 is displayed, replace air bag sensor assembly. If DTC 33/B1141 is displayed, replace left-head impact/side air bag sensor assembly.
  9. Check for intermittent air bag system fault. 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.
scientia non olet · About LEMON Manuals