1.CHECK DTC. Read the DTC. (Current malfunction) Read Diagnostic Trouble Code (DTC) | Is DTC other than B1656 displayed- | Perform the diagnosis according to DTC. | Diagnostic Chart with Trouble Code > DTC B1656 FRONT BUCKLE SWITCH LH FAILURE |
2.CHECK POOR CONTACT OF CONNECTORS. Check for poor contact of the connectors between the airbag control module and the buckle switch. | | When the connector is not fully connected, reconnect the connector correctly. Replace the airbag rear harness together with body harness, if the connector is faulty. | Diagnostic Chart with Trouble Code > DTC B1656 FRONT BUCKLE SWITCH LH FAILURE |
3.CHECK AIRBAG REAR HARNESS (BETWEEN AIRBAG CONTROL MODULE AND BUCKLE SWITCH) (OPEN CIRCUIT). 1) Turn the ignition switch to OFF, disconnect the battery ground terminal, and wait for 60 seconds. 2) Disconnect the connector (AB21) from seat belt pretensioner LH. 3) Disconnect the connector (AB5) from seat cushion airbag module LH. 4) Disconnect the connector (AB31) from curtain airbag module LH. 5) Disconnect the connector (AB19) of the side airbag module LH. 6) Disconnect the connectors (AB6, AB17, AB18) from airbag control module. 7) Connect the connector (1AD) in test harness AD AV to the connectors (AB6, AB17, AB18). 8) Connect the connector (2AD) in test harness AD AV and the connector (1AG) in test harness AG. 9) Disconnect the buckle switch connector (R108). 10) Measure the resistance between connector (6AG) in the test harness AG and connector (R108). CAUTION: Connect terminal (1AW) in test harness AW to connector (R108) terminal, and apply the tester to terminal (2AW). Connector & terminal (6AG) No. 17 — (R108) No. 1: (6AG) No. 2 — (R108) No. 2: | Is the resistance less than 10 -- | Diagnostic Chart with Trouble Code > DTC B1656 FRONT BUCKLE SWITCH LH FAILURE | Replace the airbag main harness along with body harness. |
4.CHECK AIRBAG REAR HARNESS (BETWEEN AIRBAG CONTROL MODULE AND BUCKLE SWITCH) (SHORTED TO GROUND). Measure the resistance between connector (6AG) in the test harness AG and chassis ground. Connector & terminal (6AG) No. 17 — Chassis ground: (6AG) No. 2 — Chassis ground: | Is the resistance 1 M- or more- | Diagnostic Chart with Trouble Code > DTC B1656 FRONT BUCKLE SWITCH LH FAILURE | Replace the airbag main harness along with body harness. |
5.CHECK AIRBAG REAR HARNESS (BETWEEN AIRBAG CONTROL MODULE AND BUCKLE SWITCH) (SHORTED TO POWER SUPPLY). 1) Turn the ignition switch to ON. 2) Measure the resistance between connector (6AG) in the test harness AG and chassis ground. Connector & terminal (6AG) No. 17 (+) — Chassis ground (−): (6AG) No. 2 (+) — Chassis ground (−): | Is the voltage less than 1 V- | Diagnostic Chart with Trouble Code > DTC B1656 FRONT BUCKLE SWITCH LH FAILURE | Replace the airbag main harness along with body harness. |
6.REPLACE BUCKLE SWITCH AND CHECK AIRBAG CONTROL MODULE AFTER REPLACEMENT. 1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more. 2) Replace the buckle switch. Front Seat Belt > REMOVAL 3) Connect all connectors. 4) Clear the memory. Clear Memory Mode 5) Perform the Inspection Mode. Inspection Mode 6) Read the DTC. (Current malfunction) Read Diagnostic Trouble Code (DTC) | | Replace the airbag control module. Airbag Control Module > REMOVAL | Diagnostic Chart with Trouble Code > DTC B1656 FRONT BUCKLE SWITCH LH FAILURE |
7.CHECK FOR ANY OTHER DTC ON DISPLAY. Read the DTC. (Current malfunction) Read Diagnostic Trouble Code (DTC) | Is any other DTC displayed- | Check DTC using “List of Diagnostic Trouble Code”. List of Diagnostic Trouble Code (DTC) > LIST | |
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