| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001W7FT |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [03/2019 - 09/2022] |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for TMMMS Made): B166A; Pressure Sensor Difference for Front Door; 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022] | ||
|
DTC |
B166A |
Pressure Sensor Difference for Front Door |
DESCRIPTION
The side airbag pressure sensor LH and side airbag pressure sensor RH detect impacts to the vehicle through changes in pressure inside the front doors caused by deformation of the outer side of the front doors and send signals to the airbag sensor assembly.
Based on the signals sent by the side airbag pressure sensors, the airbag sensor assembly determines if the airbags and pretensioners should be deployed.
If the difference between the pressure detected by the side airbag pressure sensor LH and the pressure detected by the side airbag pressure sensor RH exceeds a certain value a certain number of times, the airbag sensor assembly will store DTC B166A.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Warning Indicate |
Test Mode / Check Mode |
|---|---|---|---|---|---|
|
B166A |
Pressure Sensor Difference for Front Door |
The difference between the pressure detected by the side airbag pressure sensor LH and the side airbag pressure sensor RH exceeds a certain value a certain number of times. |
|
Comes on |
Does not apply to test/check mode |
CAUTION / NOTICE / HINT
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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![2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK DTC |
(a) Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes
OK:
DTCs B1633, B1642, B1643, B166D, B166E, B1638, B1647, B1648, B167B and B167C are not output.
HINT:
If DTC B1633, B1642, B1643, B166D, B166E, B1638, B1647, B1648, B167B or B167C is output, perform troubleshooting for the DTC first.
| NG |
|
GO TO DIAGNOSTIC TROUBLE CODE CHART
|
|
|
2. |
CHECK SIDE AIRBAG PRESSURE SENSOR LH |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
(c) Replace the side airbag pressure sensor LH with a known good one.
Click here
HINT:
Perform the following inspection using known good parts from another vehicle if possible.
(d) Connect the cable to the negative (-) battery terminal.
(e) Turn the ignition switch to ON, and wait for at least 60 seconds.
(f) Clear the DTCs stored in memory.
Body Electrical > SRS Airbag > Clear DTCs
(g) Turn the ignition switch off.
(h) Turn the ignition switch to ON, and wait for at least 60 seconds.
(i) Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes
OK:
DTC B166A is not output.
HINT:
Codes other than DTC B166A may be output at this time, but they are not related to this check.
(j) Turn the ignition switch off.
(k) Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
(l) Restore the side airbag pressure sensor LH that was installed for testing to its original location.
Click here
| OK |
|
|
|
3. |
CHECK SIDE AIRBAG PRESSURE SENSOR RH |
(a) Replace the side airbag pressure sensor RH with a known good one.
Click here
HINT:
Perform the following inspection using known good parts from another vehicle if possible.
(b) Connect the cable to the negative (-) battery terminal.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Clear the DTCs stored in memory.
Body Electrical > SRS Airbag > Clear DTCs
(e) Turn the ignition switch off.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes
OK:
DTC B166A is not output.
HINT:
Codes other than DTC B166A may be output at this time, but they are not related to this check.
(h) Turn the ignition switch off.
(i) Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
(j) Restore the side airbag pressure sensor RH that was installed for testing to its original location.
Click here
| OK |
|
| NG |
|
|
|