STEP 3. Diagnosis check by dummy resistor connection.
(1) Check that the negative battery terminal is disconnected. If the negative battery terminal is connected, disconnect it.
(2) Use the flat-tipped screwdriver to pull out the locking button of wiring harness side connector, and release the lock.
(3) Connect special tool dummy resistor (MB991865) to special tool resistor harness (MB991884).
(4) caution | Do not insert a probe directly into the terminal from the connector front side as the connector contact pressure may be weakened. |
Insert the resistor harness probe from the back of harness side connector ASQ+, ASQ- line <B1411>.
Insert the resistor harness probe from the back of harness side connector ASQ+, ASQ- line <B1491>.
(5) Connect the negative battery terminal.
(6) caution | Always DTC B1491 is stored when checking DTC B1411. This is because the second side terminal is isolated when checking it. DTC B1491 is stored but this is not a fault. In addition, always DTC B1411 is stored when checking DTC B1491 because the first side terminal is isolated. |
Erase the diagnostic trouble code memory, and check the diagnostic trouble code.
(7) Disconnect the negative battery terminal.
Is the checked DTC stored?
Go to Step 4. Replace the passenger's (front) air bag module (Refer to ).