Toyota CH-R Service Manual: Side Airbag Sensor Assembly No.2 Lost Communication (LH) (B163B/86,B163C/86)

Toyota CH-R Service Manual / Supplemental Restraint Systems / Airbag System / Side Airbag Sensor Assembly No.2 Lost Communication (LH) (B163B/86,B163C/86)

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.

These DTCs are stored when a malfunction is detected in the side collision sensor LH circuit (bus 2).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Test Mode / Check Mode

B163B/86

Side Airbag Sensor Assembly No.2 Lost Communication (LH)

Any of the following conditions is met:

  • The airbag sensor assembly detects a line short in the side collision sensor LH circuit (bus 2)
  • The airbag sensor assembly detects a short to ground in the side collision sensor LH circuit (bus 2).
  • The airbag sensor assembly detects a short to B+ in the side collision sensor LH circuit (bus 2).
  • The airbag sensor assembly detects an open in the side collision sensor LH circuit (bus 2).
  • Floor side airbag sensor LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Floor side airbag sensor LH
  • Airbag sensor assembly

Does not apply to test/check mode

B163C/86

Side Airbag Sensor Assembly No.2 Initialization Error (LH)

Any of the following conditions is met:

  • The airbag sensor assembly detects a line short in the side collision sensor LH circuit (bus 2)
  • The airbag sensor assembly detects a short to ground in the side collision sensor LH circuit (bus 2).
  • The airbag sensor assembly detects a short to B+ in the side collision sensor LH circuit (bus 2).
  • The airbag sensor assembly detects an open in the side collision sensor LH circuit (bus 2).
  • Floor side airbag sensor LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Floor side airbag sensor LH
  • Airbag sensor assembly

Does not apply to test/check mode

DTC Detection Conditions (B163B/86):
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Pattern 5

Pattern 6

Diagnosis Condition

Ignition switch ON

Malfunction Status

The airbag sensor assembly detects a line short in the side collision sensor LH circuit (bus 2)

-

-

-

-

-

The airbag sensor assembly detects a short to ground in the side collision sensor LH circuit (bus 2)

-

-

-

-

-

The airbag sensor assembly detects a short to B+ in the side collision sensor LH circuit (bus 2)

-

-

-

-

-

The airbag sensor assembly detects an open in the side collision sensor LH circuit (bus 2)

-

-

-

-

-

Floor side airbag sensor LH malfunction

-

-

-

-

-

Airbag sensor assembly malfunction

-

-

-

-

-

Detection Time

-

-

-

-

-

-

Number of Trips

1 trip

1 trip

1 trip

1 trip

1 trip

1 trip

DTC Detection Conditions (B163C/86):
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Pattern 5

Pattern 6

Diagnosis Condition

Ignition switch ON

Malfunction Status

The airbag sensor assembly detects a line short in the side collision sensor LH circuit (bus 2)

-

-

-

-

-

The airbag sensor assembly detects a short to ground in the side collision sensor LH circuit (bus 2)

-

-

-

-

-

The airbag sensor assembly detects a short to B+ in the side collision sensor LH circuit (bus 2)

-

-

-

-

-

The airbag sensor assembly detects an open in the side collision sensor LH circuit (bus 2)

-

-

-

-

-

Floor side airbag sensor LH malfunction

-

-

-

-

-

Airbag sensor assembly malfunction

-

-

-

-

-

Detection Time

-

-

-

-

-

-

Number of Trips

1 trip

1 trip

1 trip

1 trip

1 trip

1 trip

HINT:

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

WIRING DIAGRAM

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.

Click here

PROCEDURE

1.

CHECK CONNECTORS

(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) Check that the connectors are properly connected to the airbag sensor assembly and floor side airbag sensor LH.

OK:

The connectors are properly connected.

HINT:

If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the airbag sensor assembly and floor side airbag sensor LH.

(e) Check that the terminals of the connectors are not deformed or damaged.

OK:

The terminals are not deformed or damaged.

NG

REPLACE FLOOR WIRE

OK

2.

CHECK FLOOR WIRE (OPEN)

(a) w/o Occupant Classification System

(1) Using a service wire, connect terminals 8 (BBL+) and 15 (BBL-) of connector B.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

(b) w/ Occupant Classification System

(1) Using a service wire, connect terminals 21 (BCL+) and 22 (BCL-) of connector B.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Floor Side Airbag Sensor LH

*2

Airbag Sensor Assembly

*3

Floor Wire

*4

Service Wire

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Floor Side Airbag Sensor LH)

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

M35-2 (BFL+) - M35-1 (BFL-)

Always

Below 1 Ω

(d) Disconnect the service wire from connector B.

NG

REPLACE FLOOR WIRE

OK

3.

CHECK FLOOR WIRE (SHORT)

(a) Measure the resistance according to the value(s) in the table below.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Floor Side Airbag Sensor LH

*2

Airbag Sensor Assembly

*3

Floor Wire

-

-

*a

Front view of wire harness connector

(to Floor Side Airbag Sensor LH)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

M35-2 (BFL+) - M35-1 (BFL-)

Always

1 MΩ or higher

NG

REPLACE FLOOR WIRE

OK

4.

CHECK FLOOR WIRE (SHORT TO B+)

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

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Floor Side Airbag Sensor LH

*2

Airbag Sensor Assembly

*3

Floor Wire

-

-

*a

Front view of wire harness connector

(to Floor Side Airbag Sensor LH)

-

-

(b) Turn the ignition switch ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

M35-2 (BFL+) - Body ground

Ignition switch ON

Below 1 V

M35-1 (BFL-) - Body ground

Ignition switch ON

Below 1 V

(d) Turn the ignition switch off.

(e) 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.

NG

REPLACE FLOOR WIRE

OK

5.

CHECK FLOOR WIRE (SHORT TO GROUND)

(a) Measure the resistance according to the value(s) in the table below.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Floor Side Airbag Sensor LH

*2

Airbag Sensor Assembly

*3

Floor Wire

-

-

*a

Front view of wire harness connector

(to Floor Side Airbag Sensor LH)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

M35-2 (BFL+) - Body ground

Always

1 MΩ or higher

M35-1 (BFL-) - Body ground

Always

1 MΩ or higher

NG

REPLACE FLOOR WIRE

OK

6.

CHECK FLOOR SIDE AIRBAG SENSOR LH

(a) Connect the connector to the airbag sensor assembly.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Floor Side Airbag Sensor RH

*2

Airbag Sensor Assembly

(b) Interchange the floor side airbag sensor LH with RH and connect the connectors.

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

(d) Clear the DTCs stored in memory.

Click here

Body Electrical > SRS Airbag > Clear DTCs

(e) Turn the ignition switch off.

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

(g) Check for DTCs.

Click here

Body Electrical > SRS Airbag > Trouble Codes

HINT:

Codes other than DTCs B162B/85, B162C/85, B163B/86 and B163C/86 may be output at this time, but they are not related to this check.

Result

Proceed to

DTC B163B/86 or B163C/86 is output.

A

DTC B162B/85 or B162C/85 is output.

B

DTCs B162B/85, B162C/85, B163B/86 and B163C/86 are not output.

C

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

A

REPLACE AIRBAG SENSOR ASSEMBLY

B

REPLACE FLOOR SIDE AIRBAG SENSOR LH

C

USE SIMULATION METHOD TO CHECK

    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 ...

    Occupant Classification System Malfunction (B1650/32,B165A/32)
    DESCRIPTION The airbag sensor assembly and occupant detection ECU communicate via CAN communication. When the occupant detection ECU stores DTC B1771, B1780, B1782, B1795, B1798, B1799, U0125 or U ...

    Other materials:

    Toyota CH-R Service Manual > Steering Lock System: Data List / Active Test
    DATA LIST / ACTIVE TEST READ DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signal ...

    Toyota CH-R Service Manual > Toyota Entune System: System Diagram
    SYSTEM DIAGRAM HINT: Refer to following systems for details of the system diagram for Toyota Entune System. Audio and Visual System (w/o Navigation System) Click here Navigation System (w/ Navigation System) Click here Safety Connect System Click he ...

    © 2017-2019 Copyright www.tochr.net
    0.0194