NOTE During testing if DTCs other than DTC B are displayed disregard them

Diagnostic Procedure

1. 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 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, go to next step.

2. 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 and secure. Reconnect connector as necessary. Go to next step.

3. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM.

4. Disconnect left head impact-side air bag sensor assembly connector. Connect jumper wire between left head impact-side air bag sensor assembly harness connector terminals No. 2 (circuit SSL+, Blue-White wire) and No. 4 (circuit ESL, Gray-Blue wire). See Fig. 24 . Measure resistance between air bag sensor assembly connector A19, terminals No. 10 (circuit SSL+, Blue-White wire) and No. 9 (circuit ESL, Gray-Blue wire). See Fig. 22 . 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. Connect jumper wire between left head impact-side air bag sensor assembly harness connector terminals No. 1 (circuit VUPL, Pink-Blue wire) and No. 3 (circuit SSL-, Light Green-Black wire). See Fig. 24 . Measure resistance between air bag sensor assembly connector A19, terminals No. 7 (circuit VUPL, Pink-Blue wire) and No. 12 (circuit SSL-, Light Green-Black wire). See Fig. 22 . 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.

6. Measure resistance between ground and air bag sensor assembly harness connector A19, terminals No. 7 (circuit VUPL, Pink-Blue wire), No. 10 (circuit SSL+, Blue-White wire) and No. 12 (circuit SSL-, Light Green-Black wire) individually. See Fig. 22 . If resistance in all tests is more than one megohm, go to next step. If any 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. See WIRING DIAGRAMS .

2001 ACCESSORIES/SAFETY EQUIPMENT Toyota - Air Bag Restraint Systems

7. Connect negative battery cable. Turn ignition switch to ON position. Measure voltage between ground and air bag sensor assembly harness connector A19, terminals No. 7 (circuit VUPL, Pink-Blue wire), No. 10 (circuit SSL+, Blue-White wire), No. 12 (circuit SSL-, Light Green-Black wire) and No. 9 (circuit ESL, Gray-Blue wire) individually. See Fig. 22 . 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 left head impact-side air bag sensor assembly and air bag sensor assembly. See WIRING DIAGRAMS .

8. Ensure negative battery cable is disconnected. Reconnect left head impact-side air bag sensor connector and air bag sensor assembly connector A19. 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 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, go to next step.

9. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Disconnect left head impact-side air bag sensor assembly. Disconnect right head impact-side air bag sensor assembly. Connect right head impact-side air bag sensor assembly to left head impact-side air bag sensor assembly 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 33-B1141 is not displayed, go to next step. If DTC 33-B1141 is displayed, replace air bag sensor assembly.

10. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Connect left head impact-side air bag sensor assembly to right head impact-side air bag sensor assembly 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 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-B1140 is displayed, replace left head impact-side air bag sensor assembly.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

Get My Free Ebook


Post a comment