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Q.
Is diagnosis code B1519 set?
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(1)Check that the negative auxiliary battery terminal is disconnected. If the negative
auxiliary battery terminal is connected, disconnect it.
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(2)Disconnect the connector B-113 and then reconnect it.
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(3)Connect the negative auxiliary battery terminal.
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(4)After erasing the diagnosis code memory, check the diagnosis code again.
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(5)Disconnect the negative auxiliary battery terminal.
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Q.
Is diagnosis code B1609 set?
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The procedure is complete. It is assumed that diagnosis code B1609 set as connector
B-113 was engaged improperly.
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(1)Check that the negative auxiliary battery terminal is disconnected. If the negative
auxiliary battery terminal is connected, disconnect it.
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(2)After disconnecting B-113 SRS-ECU and front passenger’s pre-tensioner connector
(harness side), reconnect the connector. For the connector disconnection, use the use the flat-tipped
screwdriver to pull out the harness side connector locking button. After releasing the lock, disconnect
the connector. (3)Connect the negative auxiliary battery terminal. (4)After erasing the diagnosis code memory, check the diagnosis code again. (5)Disconnect the negative auxiliary battery terminal.
Q.
Is diagnosis code B1609 set?
Go to Step 4
The procedure is complete. It is assumed that diagnosis code B1609 set as connector
B-113 or C-31 <LHD> and C-18 <RHD> was engaged improperly.
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(1)Check that the negative auxiliary battery terminal is disconnected. If the negative
auxiliary battery terminal is connected, disconnect it.
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(2)After disconnecting B-113 SRS-ECU and front passenger’s pre-tensioner connector
(harness side), reconnect the connector. For C-31 <LHD> and C-18 <RHD> connector disconnection,
use the flat-tipped screwdriver to pull out the harness side connector locking button. After
releasing the lock, disconnect the connector.
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(3)Connect special tool dummy resistor (MB991865) to special tool resistor harness (MB991884). (4)Connect special tool resistor harness to the C-31 <LHD> and C-18 <RHD>
harness side connector. (5)Connect the negative auxiliary battery terminal. (6)After erasing the diagnosis code memory, check the diagnosis code again. (7)Disconnect the negative auxiliary battery terminal.
Q.
Is the diagnosis code No. B1609 set?
Go to Step 5
Replace the seat belt with pre-tensioner (passenger’s side) (Refer to ).
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(1)Check that the negative auxiliary battery terminal is disconnected. If the negative
auxiliary battery terminal is connected, disconnect it.
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(2)Disconnect the B-113 SRS-ECU connector.
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(3)
danger |
To release the SRS-ECU connector short spring in the following
operations, disconnect this seat belt pre-tensioner connector, and keep the squib circuit shorted.
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Use the flat-tipped screwdriver to pull out the locking button at the front passenger’s
pre-tensioner connector (wiring harness side), then unlock and disconnect the connector.
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(4)
caution |
The short spring may not be released due to the insufficient insertion. Therefore, insert
the insulator for 4 mm or more.
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Insert an insulator (width: 3 mm, thickness: 0.5 mm) such as cable tie between the terminal
5/6, and the short spring, and release the short spring. (5)
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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Take the measurements below at the B-113 harness side connector.
- Continuity between terminals 5 and 6
OK: No continuity
Q.
Is the check result normal?
Go to Step 6.
Repair the wiring harness between the B-113 SRS-ECU connector terminal No. 5/6
and the C-31 <LHD> and C-18 <RHD> seat belt pre-tensioner connector terminal No. 2/1.
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Q.
Is diagnosis code B1609 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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