Lexus NX: Side Airbag Sensor RH (B1690,B1695)
DESCRIPTION
The door side airbag sensor LH or RH consists of a lateral deceleration sensor, etc.
If the airbag ECU assembly receives signals from the lateral deceleration sensor, it determines whether the SRS should be activated.
DTC B1690 or B1695 is stored when a malfunction is detected in the door side airbag sensor LH or RH circuit.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B1690 | Side Airbag Sensor RH | Either condition is met:
|
|
| B1695 | Side Airbag Sensor LH | Either condition is met:
|
|
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
-
After the power switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
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When disconnecting and reconnecting the auxiliary battery
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HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
Click here
-
After replacing the airbag ECU assembly, refer to initialization.
Click here
PROCEDURE
| 1. | CHECK DTC |
(a) Turn the power switch on (IG), and wait for at least 60 seconds.
(b) Clear the DTCs stored in memory.
Click here
(c) Turn the power switch off.
(d) Turn the power switch on (IG), and wait for at least 60 seconds.
(e) Check for DTCs.
Click here
HINT:
Codes other than DTC B1690 and B1695 may be output at this time, but they are not related to this check.
| DTC B1695 is output | .gif) | GO TO STEP 3 |
| DTC B1690 and B1695 are not output | | USE SIMULATION METHOD TO CHECK |
|
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| 2. | CHECK DOOR SIDE AIRBAG SENSOR RH |
| (a) Turn the power switch off. |
|
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(b) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
(c) Interchange the door side airbag sensor RH with LH and connect the connectors to them.
(d) Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
(e) Turn the power switch on (IG), and wait for at least 60 seconds.
(f) Clear the DTCs stored in memory.
Click here
(g) Turn the power switch off.
(h) Turn the power switch on (IG), and wait for at least 60 seconds.
(i) Check for DTCs.
Click here
HINT:
Codes other than DTC B1690 and B1695 may be output at this time, but they are not related to this check.
(j) Turn the power switch off.
(k) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
(l) Return the door side airbag sensor LH and RH to their original positions and connect the connectors to them.
| DTC B1695 is output | | REPLACE DOOR SIDE AIRBAG SENSOR RH |
| DTC B1690 is output | | REPLACE AIRBAG ECU ASSEMBLY |
| DTC B1690 and B1695 are not output | | USE SIMULATION METHOD TO CHECK |
| 3. | CHECK DOOR SIDE AIRBAG SENSOR LH |
| (a) Turn the power switch off. |
|
(b) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
(c) Interchange the door side airbag sensor LH with RH and connect the connectors to them.
(d) Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
(e) Turn the power switch on (IG), and wait for at least 60 seconds.
(f) Clear the DTCs stored in memory.
Click here
(g) Turn the power switch off.
(h) Turn the power switch on (IG), and wait for at least 60 seconds.
(i) Check for DTCs.
Click here
HINT:
Codes other than DTC B1690 and B1695 may be output at this time, but they are not related to this check.
(j) Turn the power switch off.
(k) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
(l) Return the door side airbag sensor RH and LH to their original positions and connect the connectors to them.
| DTC B1690 is output | | REPLACE DOOR SIDE AIRBAG SENSOR LH |
| DTC B1695 is output | | REPLACE AIRBAG ECU ASSEMBLY |
| DTC B1690 and B1695 are not output | | USE SIMULATION METHOD TO CHECK |
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