Lexus NX: Front Airbag Sensor (LH) (B1615)
DESCRIPTION
The front airbag sensor LH consists of a diagnostic circuit and frontal deceleration sensor, etc.
If the airbag ECU assembly receives signals from the frontal deceleration sensor, it determines whether the SRS should be activated.
DTC B1615 is stored when a malfunction is detected in the front airbag sensor LH circuit.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B1615 | Front Airbag Sensor (LH) | Either condition is met:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
After the power switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
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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.
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-
After replacing the airbag ECU assembly, refer to initialization.
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PROCEDURE
| 1. | CHECK FRONT 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 front 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.
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(g) Turn the power switch off.
(h) Turn the power switch on (IG), and wait for at least 60 seconds.
(i) Check for DTCs.
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HINT:
Codes other than DTC B1610 and B1615 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 front airbag sensor RH and LH to their original positions and connect the connectors to them.
| DTC B1615 is output | .gif) | REPLACE AIRBAG ECU ASSEMBLY |
| DTC B1610 is output | | REPLACE FRONT AIRBAG SENSOR LH |
| DTC B1610 and B1615 are not output | | USE SIMULATION METHOD TO CHECK |
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