Toyota CH-R Service Manual: Side Airbag Sensor Assembly No.2 (LH) (B163A/3A)

Toyota CH-R Service Manual / Supplemental Restraint Systems / Airbag System / Side Airbag Sensor Assembly No.2 (LH) (B163A/3A)

DESCRIPTION

The side collision sensor LH circuit (bus 2) consists of the airbag sensor assembly and floor side airbag sensor LH.

The floor side airbag sensor LH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the airbags and pretensioners should be deployed.

DTC B163A/3A is stored when a malfunction is detected in the floor side airbag sensor LH.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Test Mode / Check Mode
B163A/3A	Side Airbag Sensor Assembly No.2 (LH)	Any of the following conditions is met: Floor side airbag sensor LH malfunction Airbag sensor assembly malfunction	Floor side airbag sensor LH Airbag sensor assembly	Does not apply to test/check mode

DTC Detection Conditions:

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	Ignition switch ON	○	○
Malfunction Status	Floor side airbag sensor LH malfunction	○	-
Malfunction Status	Airbag sensor assembly malfunction	-	○
Detection Time		-	-
Number of Trips		1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

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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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PROCEDURE

1.	CHECK FLOOR SIDE AIRBAG SENSOR LH

(a) Turn the ignition switch off.

*A	w/o Occupant Classification System
*B	w/ Occupant Classification System
*1	Floor Side Airbag Sensor RH
*2	Airbag Sensor Assembly

(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.

(d) Connect the cable to the negative (-) battery terminal.

(e) Clear the DTCs stored in memory.

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Body Electrical > SRS Airbag > Clear DTCs

(f) Turn the ignition switch off.

(g) Turn the ignition switch ON, and wait for at least 60 seconds.

(h) Check for DTCs.

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Body Electrical > SRS Airbag > Trouble Codes

HINT:

Codes other than DTCs B162A/2A and B163A/3A may be output at this time, but they are not related to this check.

Result	Proceed to
DTC B163A/3A is output.	A
DTC B162A/2A is output.	B
DTCs B162A/2A and B163A/3A are not output.	C

(i) Turn the ignition switch off.

(j) 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.

(k) Return the floor side airbag sensor LH and RH to their original positions and connect the connectors.

REPLACE AIRBAG SENSOR ASSEMBLY

REPLACE FLOOR SIDE AIRBAG SENSOR LH

USE SIMULATION METHOD TO CHECK

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