STEP 3. Check the Knee air bag module.
(1) Disconnect the negative battery terminal.
(2) 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.
(3) Connect special tool MB991865 to special tool MB991884.
(4) Connect special tool MB991884 to the C-223 harness side connector.
(5) Connect the negative battery terminal.
(6) Erase diagnostic trouble code memory, and check the diagnostic trouble code.
Is DTC B1633 set?
Go to Step 4. Replace the driver’s knee air bag module (Refer to ). Then go to Step 6.