Toyota CH-R Service Manual: Front Door Pressure Sensor RH (B166C/4A,B166F/4A)

DESCRIPTION

The side collision sensor RH circuit (bus 1) consists of the airbag sensor assembly, door side airbag sensor RH, No. 1 side airbag sensor RH and No. 2 side airbag sensor RH.

The door side airbag sensor RH, No. 1 side airbag sensor RH and No. 2 side airbag sensor RH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbags and pretensioners should be deployed.

These DTCs are stored when a malfunction is detected in the door side airbag sensor RH.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Test Mode / Check Mode
B166C/4A	Front Door Pressure Sensor RH	Any of the following conditions is met: Door side airbag sensor RH malfunction Airbag sensor assembly malfunction	Door side airbag sensor RH Airbag sensor assembly	Does not apply to test/check mode
B166F/4A	Front Door Pressure Sensor Threshold Malfunction (RH)	Any of the following conditions is met: Door side airbag sensor RH malfunction Airbag sensor assembly malfunction	Door side airbag sensor RH Airbag sensor assembly	Does not apply to test/check mode

DTC Detection Conditions (B166C/4A):

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

DTC Detection Conditions (B166F/4A):

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	Ignition switch ON	○	○
Malfunction Status	Door side airbag sensor RH malfunction	○	-
	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 DOOR SIDE AIRBAG SENSOR RH

(a) Turn the ignition switch off.

*1 Door Side Airbag Sensor LH *2 No. 2 Side Airbag Sensor RH

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminals to disable the SRS system.

(c) Interchange the door side airbag sensor RH with LH and connect the connectors.

(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 B166C/4A, B166F/4A, B167A/5A and B167E/5A may be output at this time, but they are not related to this check.

Result	Proceed to
DTC B166C/4A or B166F/4A is output.	A
DTC B167A/5A or B167E/5A is output.	B
DTCs B166C/4A, B166F/4A, B167A/5A and B167E/5A 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 door side airbag sensor RH and LH to their original positions and connect the connectors.

A

REPLACE AIRBAG SENSOR ASSEMBLY

B

REPLACE DOOR SIDE AIRBAG SENSOR RH

C

USE SIMULATION METHOD TO CHECK