6 Check squib. Center Airbag Sensor Assembly Spiral Cable Steering Wheel Pad (Squib) ACC ON or E₁ Tc Code 12 AIRB023 AIRB139 AIRB257 D (1) Turn ignition switch LOCK. (2) Disconnect battery negative (-) terminal cable, and wait at least 20 seconds. (3) Connect steering wheel pad (squib) connector. (4) Connect negative (-) terminal cable to battery, and wait at least 2 seconds. C (1) Turn ignition switch ACC or ON, and wait at least 20 seconds. (2) Using SST, connect terminals Tc and E₁ of check connector. SST 09843-18020 (3) Check diagnostic code. OK Diagnostic code 12 is not output. Hint Codes other than code 12 may be output at this time, but this is not relevant to this check. OK NG Replace steering wheel pad. From the results of the above inspection, the malfunctioning part can now be considered normal. To make sure of this, use the simulation method to check. 7 Check spiral cable. Center Airbag Sensor Assembly Spiral Cable Steering Wheel Pad (Squib) ON D⁺ AIRB021 AIRB138 AIRB257 D (1) Turn ignition switch LOCK. (2) Disconnect connector between center airbag sensor assembly and spiral cable. (3) Turn ignition switch ON. C Measure voltage at D⁺ on spiral cable side of connector between spiral cable and steering wheel pad. OK Voltage: 0 V OK NG Repair or replace spiral cable. Repair or replace harness or connector between center airbag sensor assembly and spiral cable.