Lexus NX: Curtain Shield Airbag Sensor (RH) (B1630,B1632,B1635,B1637)
DESCRIPTION
The side airbag sensor assembly 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 B1630, B1632, B1635 or B1637 is stored when a malfunction is detected in the side airbag sensor assembly LH or RH circuit.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B1630 | Curtain Shield Airbag Sensor (RH) | Either condition is met:
|
|
| B1632 | Curtain Shield Airbag Sensor Lost Communication (RH) | Either condition is met:
|
|
| B1635 | Curtain Shield Airbag Sensor (LH) | Either condition is met:
|
|
| B1637 | Curtain Shield Airbag Sensor Lost Communication (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 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 DTC |
(a) Turn the power switch on (IG), and wait for at least 60 seconds.
(b) Clear the DTCs stored in memory.
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(c) Turn the power switch off.
(d) Turn the power switch on (IG), and wait for at least 60 seconds.
(e) Check for DTCs.
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HINT:
Codes other than DTC B1630, B1632, B1635 and B1637 may be output at this time, but they are not related to this check.
| DTC B1630 or B1632 is output | .gif) | GO TO STEP 3 |
| DTC B1630, B1632, B1635 and B1637 are not output | | USE SIMULATION METHOD TO CHECK |
|
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| 2. | CHECK SIDE AIRBAG SENSOR ASSEMBLY 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 side airbag sensor assembly 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 B1630, B1632, B1635 and B1637 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 side airbag sensor assembly RH and LH to their original positions and connect the connectors to them.
| DTC B1630 or B1632 is output | | REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH |
| DTC B1635 or B1637 is output | | REPLACE AIRBAG ECU ASSEMBLY |
| DTC B1630, B1632, B1635 and B1637 are not output | | USE SIMULATION METHOD TO CHECK |
| 3. | CHECK SIDE AIRBAG SENSOR ASSEMBLY RH |
| (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 side airbag sensor assembly 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 B1630, B1632, B1635 and B1637 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 side airbag sensor assembly LH and RH to their original positions and connect the connectors to them.
| DTC B1635 or B1637 is output | | REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH |
| DTC B1630 or B1632 is output | | REPLACE AIRBAG ECU ASSEMBLY |
| DTC B1630, B1632, B1635 and B1637 are not output | | USE SIMULATION METHOD TO CHECK |
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SEE MORE:
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
Click here HINT:
Use the table below to help determine the cau
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the lighting system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. INSPECT AUXILIARY BATTERY VOLTAGE (a) Measure the auxiliary battery voltage with the power
