LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 1992 >> SC 400 >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Air Bag Restraint System) >> Diagnostic Tests >> DTC 14/B0101: Open In Driver-Side Air Bag Module Squib Circuit >> Diagnostic Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedure

WARNING: This page is about a different car, the 1998 Lexus SC 400 and 1998 Lexus SC 300. 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.
  2. Measure resistance between Red wire (circuit D+) and White wire (circuit D-) of upper spiral cable connector. If resistance is more than one ohm, go to step 5). If resistance is less than one ohm, go to next step.
  3. Connect air bag sensor assembly connector. Connect jumper wire between Red wire (circuit D+) and White wire (circuit D-) of upper spiral cable 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 DIAGNOSIS & TESTING. 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 codes. See RETRIEVING CODES  under DIAGNOSIS & TESTING. If DTC 14/B0101 is displayed, replace air bag sensor assembly. If DTC 14/B0101 is not displayed, go to next step.
  4. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Reconnect spiral cable upper connector to driver-side air bag module. Reconnect 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 DIAGNOSIS & TESTING. 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 codes. See RETRIEVING CODES  under DIAGNOSIS & TESTING. If DTC 14/B0101 is displayed, replace driver-side air bag module. If DTC 14/B0101 is not displayed, the system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT .
  5. Disconnect lower spiral cable connector. Measure resistance between Red wire (circuit D+) and White wire (circuit D-) of upper spiral cable connector. If resistance is more than one ohm, replace spiral cable. If resistance is less than one ohm, go to next step.
  6. Measure resistance between Red wire (circuit D+) and White wire (circuit D-) of air bag sensor assembly side of lower spiral cable connector. If resistance more than one ohm, replace harness between air bag sensor assembly and spiral cable. If resistance is less than one ohm, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT .
scientia non olet · About LEMON Manuals