STEP 4. Check the knee air bag module circuit. Measure the voltage at the SRS-ECU connector C-126.
(1) Disconnect the negative battery terminal.
(2) While pushing the part "A" indicated in the figure of the harness side connector, turn the lock lever to the direction of the arrow to release the lock lever, and disconnect the C-126 SRS-ECU connector.
(3) danger | To prevent the knee air bag module from deploying unintentionally, disconnect the knee air bag module connector C-223 to short the squib circuit. |
Disconnect knee air bag module connector C-223. Use a flat-tipped screwdriver to unlock the locking button at the harness side connector by withdrawing it toward you in two stages, and then disconnect the connector. (4) caution | Insert an insulator such as a cable tie to a depth of 4mm (0.16 inch) or more, otherwise the short spring will not be released. |
Insert a cable tie [3 mm (0.12 inch) wide, 0.5 mm (0.02 inch) thick] between terminals 1, 2 and the short spring to release the short spring.
(5) Connect the negative battery terminal.
(6) Ignition switch: ON.
(7) Measure the voltage between C-126 harness side connector terminals 1, 2 and body ground.Voltage should measure 1 volt or less.
Is the measured voltage within the specified range?
Erase the diagnostic trouble code memory, and check the diagnostic trouble code. If DTC B1B11 sets, replace the SRS-ECU (Refer to ). Then go to Step 6. Go to Step 5.