Toyota CH-R Service Manual: Side Airbag Sensor RH Circuit Malfunction (B1620/21)

Toyota CH-R Service Manual / Supplemental Restraint Systems / Airbag System / Side Airbag Sensor RH Circuit Malfunction (B1620/21)

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.

DTC B1620/21 is stored when a malfunction is detected in the No. 1 side airbag sensor RH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Test Mode / Check Mode

B1620/21

Side Airbag Sensor RH Circuit Malfunction

Any of the following conditions is met:

  • No. 1 side airbag sensor RH malfunction
  • Airbag sensor assembly malfunction
  • No. 1 side airbag sensor RH
  • 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

No. 1 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 NO. 1 SIDE AIRBAG SENSOR RH

(a) Turn the ignition switch off.

*1

No. 1 Side Airbag Sensor LH

*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.

(c) Interchange the No. 1 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 B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

Result

Proceed to

DTC B1620/21 is output.

A

DTC B1625/22 is output.

B

DTCs B1620/21 and B1625/22 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 No. 1 side airbag sensor RH and LH to their original positions and connect the connectors.

A

REPLACE AIRBAG SENSOR ASSEMBLY

B

REPLACE NO. 1 SIDE AIRBAG SENSOR RH

C

USE SIMULATION METHOD TO CHECK

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