STEP 4. Voltage measurement at the SRS-ECU connector.
(1) Check that the negative battery terminal is disconnected. If the negative battery terminal is connected, disconnect it.
(2) Disconnect the SRS-ECU connector.
(3) danger | To release the connector short spring in the following operations, disconnect this harness side connector, and keep the squib circuit shorted. |
Use the flat-tipped screwdriver to pull out the locking button of wiring harness side connector, and release the lock. (4) caution | The short spring may not be released due to the insufficient insertion. Therefore, insert the insulator for 4 mm (0.16 inch) or more. |
Insert an insulator [3 mm (0.12 inch) wide, 0.5 mm (0.02 inch) thick] such as cable tie between the ASQ+, ASQ- line, and then release the short spring <B1413>.
Insert an insulator [3 mm (0.12 inch) wide, 0.5 mm (0.02 inch) thick] such as cable tie between the AQ2+, AQ2- line, and then release the short spring <B1493>.
(5) Connect the negative battery terminal.
(6) Ignition switch: ON
(7) Take the measurements below at the SRS-ECU harness side connector.- Continuity between ASQ+, ASQ- line and body ground <B1413>
OK: 1 volt or less
- Continuity between AQ2+, AQ2- line and body ground <B1493>
OK: 1 volt or less
(8) Disconnect the negative battery terminal.
Is the check result normal?
Go to Step 5. Repair the wiring harnesses ASQ+, ASQ- line <B1413> or AQ2+, AQ2- line <B1493> between the SRS-ECU connector and the passenger's (front) air bag module connector.