Toyota CH-R Service Manual: Front Airbag Sensor LH Malfunction (B1615/14)

Toyota CH-R Service Manual / Supplemental Restraint Systems / Airbag System / Front Airbag Sensor LH Malfunction (B1615/14)

DESCRIPTION

The front airbag sensor LH circuit consists of the airbag sensor assembly and front airbag sensor LH.

The front 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 B1615/14 is stored when a malfunction is detected in the front airbag sensor LH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Test Mode / Check Mode

B1615/14

Front Airbag Sensor LH Malfunction

Any of the following conditions is met:

  • Front airbag sensor LH malfunction
  • Airbag sensor assembly malfunction
  • Front 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

Front airbag sensor LH 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 FRONT AIRBAG SENSOR LH

(a) Turn the ignition switch off.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Front 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.

(c) Interchange the front airbag sensor LH with RH 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 B1610/13 and B1615/14 may be output at this time, but they are not related to this check.

Result

Proceed to

DTCs B1610/13 and B1615/14 are not output.

A

DTC B1615/14 is output.

B

DTC B1610/13 is 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 front airbag sensor LH and RH to their original positions and connect the connectors.

A

USE SIMULATION METHOD TO CHECK

B

REPLACE AIRBAG SENSOR ASSEMBLY

C

REPLACE FRONT AIRBAG SENSOR LH

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