WIRING DIAGRAM
Refer to the electrical wiring diagram. < Ref. to WIRING DIAGRAM , Occupant Detection System. >
Occupant detection system < Ref. to WIRING DIAGRAM , Occupant Detection System. >
Scheme 188
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC. Read the DTC of the occupant detection system. | Is any of DTC B1760, B1761, B1771 and B1795 detected? | Perform the diagnosis according to DTC. | Go to step 2 . |
| 2 CHECK POOR CONTACT OF CONNECTORS. Check for poor contact of the connectors between the occupant detection control module and airbag control module. | Is there poor contact? | Reconnect the connector. If defective is not improved, replace the airbag rear harness along with the body harness or the occupant detection harness (seat harness). | Go to step 3 . |
| 3 CHECK AIRBAG REAR HARNESS. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more. Disconnect the connectors (AB59) and (AB53) under the passenger's seat. Disconnect the connectors (AB6, AB17, AB18) from the airbag control module, and connect the connector (1AG) in the test harness AG to connectors (AB6, AB17, AB18). Connect the connector (1AP) in the test harness AP to the connector (AB53). Measure the resistance between connector (6AG) in the test harness AG and connector (2AP) in the test harness AP. Connector & terminal (6AG) No. 9 - (2AP) No. 2: (6AG) No. 11 - (2AP) No. 1 | Is the resistance less than 10 ohms? | Go to step 4 . | Replace the airbag rear harness along with body harness. |
| 4 CHECK AIRBAG REAR HARNESS. Measure the resistance between connector (6AG) in the test harness AG and chassis ground. Connector & terminal (6AG) No. 9 - Chassis ground: (6AG) No. 11 - Chassis ground: (6AG) No. 9 - (6AG) No. 11 | Is the resistance 1 Mohms or more? | Go to step 5 . | Replace the airbag rear harness along with body harness. |
| 5 CHECK OCCUPANT DETECTION HARNESS. Turn the ignition switch to ON. Measure the voltage between connector (2AB) in the test harness AB and chassis ground. Connector & terminal (2AP) No. 3 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Replace the occupant detection harness (seat harness). If defective is not improved, replace the occupant detection system (passenger's side cushion & frame assembly), and then the airbag control module in this order. < Ref. to PASSENGER'S SEAT , DISASSEMBLY, Front Seat. > | Check the battery voltage and fuse. If there is no fault, replace the airbag rear harness together with body harness. |
DTC PROCEDURE
Occupant detection system < Ref. to WIRING DIAGRAM , Occupant Detection System. >
Scheme 189
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC. Read the DTC of the occupant detection system. | Is any of DTC B1760, B1761, B1771 and B1795 detected? | Perform the diagnosis according to DTC. | Go to step 2 . |
| 2 CHECK POOR CONTACT OF CONNECTORS. Check for poor contact of the connectors between the occupant detection control module and buckle switch. | Is there poor contact? | Reconnect the connector. If the fault is not fixed, replace the airbag harness. | Go to step 3 . |
| 3 CHECK BUCKLE SWITCH. Turn the ignition switch to OFF, disconnect the battery ground terminal, and wait for 60 seconds. Disconnect the buckle switch connector (AB60). Connect the test harness AE and test harness connector Y to buckle switch connector (AB60). Connect the battery ground terminal and turn the ignition switch to ON. | Does the airbag warning light illuminate for 6 seconds and go off? | Replace the buckle switch. < Ref. to SEAT BELT OUTER - FRONT , REMOVAL, Front Seat Belt. > | Check the seat harness, and if any fault is found, replace the seat harness. If the fault is not fixed, replace the occupant detection system (passenger's side cushion & frame assembly). < Ref. to PASSENGER'S SEAT , DISASSEMBLY, Front Seat. > |
DTC PROCEDURE