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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (Air Bag Restraint Systems) >> Diagnostic Tests >> DTC 32/B1140: Right-Side Air Bag Sensor Assembly Malfunction >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch to ACC or 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 ACC or ON position. Wait at least 20 seconds. Retrieve DTCs. See RETRIEVING CODES  under DIAGNOSTICS. If DTC 32/B1140 is displayed, go to next step. If DTC 32/B1140 is not displayed, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT .
  2. Access right-side air bag sensor assembly. See SIDE AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION. Ensure right-side air bag sensor assembly harness connector is properly connected and secure. Repair connector as necessary. Go to next step.
  3. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM.
  4. Disconnect right-side air bag sensor assembly connector. Connect jumper wire between right-side air bag sensor assembly harness connector terminals No. 2 (circuit SSR+, Blue/Yellow wire) and No. 4 (circuit ESR, Gray wire). See Fig 1. Measure resistance between air bag sensor assembly connector C7, terminals No. 10 (Blue/Yellow wire) and 7 (Gray wire). 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 right-side air bag sensor assembly and air bag sensor assembly. See WIRING DIAGRAMS .
  5. Connect jumper wire between right-side air bag sensor assembly harness connector terminals No. 1 (circuit VUPR, Pink wire) and No. 3 (circuit SSR-, Light Green wire). Measure resistance between air bag sensor assembly connector C7, terminals No. 12 (Pink wire) and 9 (Light Green wire). 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 right-side air bag sensor assembly and air bag sensor assembly.
  6. Measure resistance between ground and air bag sensor assembly harness connector C7, terminals No. 12 (Pink wire), No. 10 (Blue/Yellow wire) and No. 9 (Light Green wire) individually. If resistance in all tests is less than one ohm, go to next step. If resistance in any test is more than one ohm, repair or replace harness or connector between right-side air bag sensor assembly and air bag sensor assembly.
  7. Connect negative battery cable. Turn ignition switch to ACC or ON position. Measure voltage between ground and air bag sensor assembly harness connector C7, terminals No. 12 (Pink wire), No. 10 (Blue/Yellow wire), No. 9 (Light Green wire) and No. 7 (circuit ERS, Gray wire) individually. If zero volt is present in all tests, turn ignition switch to LOCK position, disconnect negative battery cable and go to next step. If more than zero volt is present in any test, repair or replace harness or connector between right-side air bag sensor assembly and air bag sensor assembly.
  8. Ensure negative battery cable is disconnected. Reconnect air bag sensor assembly connector C7 and right side air bag sensor harness connectors. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ACC or 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 ACC or ON position. Wait at least 20 seconds. Retrieve DTCs. See RETRIEVING CODES  under DIAGNOSTICS. If DTC 32/B1140 is not displayed, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT . If DTC 32/B11402 is displayed, go to next step.
  9. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Disconnect right-side air bag sensor assembly. Disconnect left-side air bag sensor assembly. Connect left-side air bag sensor assembly to right-side air bag sensor assembly harness connector. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ACC or 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 ACC or ON position. Wait at least 20 seconds. Retrieve DTCs. See RETRIEVING CODES  under DIAGNOSTICS. If DTC 32/B1140 is not displayed, go to next step. If DTC 32/B1140 is displayed, air bag sensor assembly. See AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION.
  10. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Connect right-side air bag sensor assembly to left-side air bag sensor assembly harness connector. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ACC or 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 ACC or ON position. Wait at least 20 seconds. Retrieve DTCs. See RETRIEVING CODES  under DIAGNOSTICS. If DTC 33/B1141 is not displayed, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT . If DTC 33/B1141 is displayed, replace right-side air bag sensor assembly.
Fig 1: Identifying Side Air Bag Sensor Assembly Harness Connector
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