STEP 4. 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 <B1410>.
Insert the resistor harness probe from the back of harness side connector AQ2+, AQ2- line <B1490>.
(5) Connect the negative battery terminal.
(6) After erasing the DTC memory, check the DTC again.
(7) Disconnect the negative battery terminal.
(8) caution | Always DTC B1490 is set when checking DTC B1410. This is because the second side terminal is isolated when checking it. DTC B1490 is set but this is not a fault. In addition, always DTC B410 is set when checking DTC B1490 because the first side terminal is isolated. |
Erase the DTC memory, and check the diagnostic trouble code.
Is the DTC set?
Go to Step 5. Replace the passenger's (front) air bag module (Refer to ).