Tc Terminal Circuit CIRCUIT DESCRIPTION By connecting terminals Tc and E1 of the check connector, the center airbag sensor assembly is set in the diagnostic code output mode. The diagnostic codes are displayed by the blinking of the airbag warning light. DIAGNOSTIC CHART Troubleshooting for this system is different depending on whether the diagnostic code is not displayed or is continuously displayed. Confirm the problem symptoms first before selecting the appropriate troubleshooting procedure. HINT: If the diagnostic code is not displayed, perform the following troubleshooting: 1 Check voltage between terminals Tc and E1 of check connector. OK → Go to step 3 NG ↓ 2 Check voltage between terminal Tc of check connector and body ground. OK → Check voltage between terminal E1 of check connector and body ground. NG ↓ 3 Check center airbag sensor assembly. OK → Check harness between center airbag sensor assembly and check connector. NG ↓ Replace center airbag sensor assembly. HINT: If the diagnostic code is continuously displayed, perform the following troubleshooting: 1 Check resistance between terminal Tc of center airbag sensor assembly and body ground. OK → Replace center airbag sensor assembly. NG ↓ Repair or replace harness or connector.