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Check the passenger’s air bag cut off switch (Refer to ).
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Q.
Is the diagnosis code set?
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Replace passenger’s air bag cut off switch (Refer to ).
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(1)Disconnect the negative battery terminal.
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(2)Disconnect passenger’s (front) air bag module connector C-02.
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(3)Connect special tool dummy resistor (MB991865) to special tool resistor harness (MB991866). (4)
caution |
Do not insert a test probe into the terminal from its front side directly as the connector contact pressure may be weakened.
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Disconnect the passenger’s (front) air bag module connector C-02, and insert special tool (MB991866) into the harness side connector by backprobing. (5)Connect the negative battery terminal. (6)Erase the diagnosis code memory, and check the diagnosis code.
Q.
Is diagnosis code B1412 set?
Go to Step 3.
Replace the passenger’s (front) air bag module (Refer to ).
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(1)Disconnect SRS-ECU connector C-131.
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(2)Disconnect passenger’s (front) air bag module connector C-02.
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(3)
caution |
Do not insert a test probe into the terminal from its front side directly as the connector contact pressure may be weakened.
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Resistance measurement between C-131 harness side connector terminals 9, 10 and body earth. OK: Open circuit
Q.
Is the check result normal?
Go to Step 4.
Repair the harness wires between SRS-ECU connector C-131 (terminal No.9 and 10) and passenger’s (front) air bag module connector C-02 (terminal No.1 and 2).
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Q.
Is diagnosis code B1412 set?
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Replace the SRS-ECU (Refer to ).
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An intermittent malfunction is suspected (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
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