STEP 3. Check SRS-ECU connector C-126 and Knee air bag module connector C-223.
(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. After disconnecting the C-126 SRS-ECU connector, connect it again.
(3) Disconnect C-223 driver's knee air bag module harness side connector, and then reconnect it. Use a flat-tipped screwdriver to pull out the connector locking button toward the arrow direction, release the lock, and then disconnect the connector.
(4) Connect the negative battery terminal.
(5) Erase the diagnostic trouble code memory, and check the diagnostic trouble code.
Is DTC B1631 set?
Go to Step 4. The procedure is complete. It is assumed that DTC B1631 set because connector C-126 or C-223 was engaged improperly.