Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000002779B |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [09/2022 - 11/2022] |
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for TMMMS Made): B1647,B1648; Side Satellite Sensor Bus Lost Communication (LH); 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022] |
DTC
|
B1647
|
Side Satellite Sensor Bus Lost Communication (LH)
|
DTC
|
B1648
|
Side Satellite Sensor Bus Initialization Error (LH)
|
DESCRIPTION
The side collision sensor LH circuit (bus 1) consists of the airbag sensor assembly, side airbag pressure sensor LH and side No. 2 airbag sensor LH.
The side airbag pressure sensor LH and side No. 2 airbag sensor LH 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 side collision sensor LH circuit (bus 1).
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
Warning Indicate
|
Test Mode / Check Mode
|
B1647
|
Side Satellite Sensor Bus Lost Communication (LH)
|
-
The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 1).
-
Side No. 2 airbag sensor LH malfunction
-
Side airbag pressure sensor LH malfunction
-
Airbag sensor assembly malfunction
|
-
Floor wire
-
Front door wire LH
-
Side No. 2 airbag sensor LH
-
Side airbag pressure sensor LH
-
Airbag sensor assembly
|
Comes on
|
Does not apply to test/check mode
|
B1648
|
Side Satellite Sensor Bus Initialization Error (LH)
|
-
The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 1).
-
Side No. 2 airbag sensor LH malfunction
-
Side airbag pressure sensor LH malfunction
-
Airbag sensor assembly malfunction
|
-
Floor wire
-
Front door wire LH
-
Side No. 2 airbag sensor LH
-
Side airbag pressure sensor LH
-
Airbag sensor assembly
|
Comes on
|
Does not apply to test/check mode
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
PROCEDURE
1.
|
CHECK CONNECTION OF 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, side airbag pressure sensor LH and side No. 2 airbag sensor LH. Also check that the connectors that link the floor wire and front door wire LH are properly connected.
OK:
The connectors are properly connected.
NG |
|
CONNECT CONNECTORS PROPERLY
|
OK
|
|
|
(a) Disconnect the connectors from the airbag sensor assembly, side airbag pressure sensor LH and side No. 2 airbag sensor LH. Also disconnect the connectors that link the floor wire and front door wire LH.
(b) Check that the terminals of the connectors are not deformed or damaged.
OK:
The terminals are not deformed or damaged.
NG |
|
REPLACE FLOOR WIRE OR FRONT DOOR WIRE LH
|
OK
|
|
|
(a) Connect the cable to the negative (-) battery terminal.
|
|
*1
|
Side No. 2 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 Side No. 2 Airbag Sensor LH)
|
|
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
O11-4 (BCL+) - Body ground
|
Ignition switch ON
|
Below 1 V
|
O11-3 (BCL-) - 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.
(f) Using a service wire, connect terminals 32 (BBL+) and 31 (BBL-) of connector B.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
O11-4 (BCL+) - O11-3 (BCL-)
|
Always
|
Below 1 Ω
|
(h) Disconnect the service wire from connector B.
(i) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
O11-4 (BCL+) - O11-3 (BCL-)
|
Always
|
1 MΩ or higher
|
O11-4 (BCL+) - Body ground
|
Always
|
1 MΩ or higher
|
O11-3 (BCL-) - Body ground
|
Always
|
1 MΩ or higher
|
NG |
|
REPLACE FLOOR WIRE
|
OK
|
|
|
(a) Connect the connectors that link the floor wire and front door wire LH.
|
|
*1
|
Side Airbag Pressure Sensor LH
|
*2
|
Side No. 2 Airbag Sensor LH
|
*3
|
Front Door Wire LH
|
*4
|
Floor Wire
|
*5
|
Service Wire
|
*a
|
Front view of wire harness connector
(to Side No. 2 Airbag Sensor LH)
|
*b
|
Front view of wire harness connector
(to Side Airbag Pressure Sensor LH)
|
|
|
(b) Connect the cable to the negative (-) battery terminal.
(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
O11-1 (BDL+) - Body ground
|
Ignition switch ON
|
Below 1 V
|
O11-2 (BDL-) - Body ground
|
Ignition switch ON
|
Below 1 V
|
(e) Turn the ignition switch off.
(f) 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.
(g) Using a service wire, connect terminals 2 (BDL+) and 1 (BDL-) of connector E.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.
(h) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
O11-1 (BDL+) - O11-2 (BDL-)
|
Always
|
Below 1 Ω
|
(i) Disconnect the service wire from connector E.
(j) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
O11-1 (BDL+) - O11-2 (BDL-)
|
Always
|
1 MΩ or higher
|
O11-1 (BDL+) - Body ground
|
Always
|
1 MΩ or higher
|
O11-2 (BDL-) - Body ground
|
Always
|
1 MΩ or higher
|
OK
|
|
|
5.
|
CHECK SIDE NO. 2 AIRBAG SENSOR LH
|
(a) Connect the connectors to the side airbag pressure sensor LH and airbag sensor assembly.
|
|
*1
|
Side No. 2 Airbag Sensor RH
|
*2
|
Airbag Sensor Assembly
|
|
|
(b) Interchange the side No. 2 airbag sensor LH with RH and connect the connectors.
(c) Connect the cable to the negative (-) battery terminal.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory.
Body Electrical > SRS Airbag > Clear DTCs
(f) Turn the ignition switch off.
(g) Turn the ignition switch to ON, and wait for at least 60 seconds.
(h) Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes
HINT:
Codes other than DTCs B1642, B1643, B1647 and B1648 may be output at this time, but they are not related to this check.
Result
|
Proceed to
|
DTC B1647 or B1648 is output.
|
A
|
DTC B1642 or B1643 is output.
|
B
|
DTCs B1642, B1643, B1647 and B1648 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 side No. 2 airbag sensor LH and RH to their original positions and connect the connectors.
A
|
|
|
6.
|
CHECK SIDE AIRBAG PRESSURE SENSOR LH
|
(a) Interchange the side airbag pressure sensor LH with RH and connect the connectors.
|
|
*1
|
Side Airbag Pressure Sensor RH
|
*2
|
Side No. 2 Airbag Sensor LH
|
|
|
(b) Connect the cable to the negative (-) battery terminal.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Clear the DTCs stored in memory.
Body Electrical > SRS Airbag > Clear DTCs
(e) Turn the ignition switch off.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes
HINT:
Codes other than DTCs B1642, B1643, B1647 and B1648 may be output at this time, but they are not related to this check.
Result
|
Proceed to
|
DTC B1647 or B1648 is output.
|
A
|
DTC B1642 or B1643 is output.
|
B
|
DTCs B1642, B1643, B1647 and B1648 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 side airbag pressure sensor LH and RH to their original positions and connect the connectors.
(a) Disconnect the floor wire connector from the front door wire LH.
|
|
*1
|
Side Airbag Pressure Sensor LH
|
*2
|
Side No. 2 Airbag Sensor LH
|
*3
|
Front Door Wire LH
|
*4
|
Floor Wire
|
*5
|
Service Wire
|
*a
|
Front view of wire harness connector
(to Side No. 2 Airbag Sensor LH)
|
*b
|
Front view of wire harness connector
(to Front Door Wire LH)
|
|
|
(b) Connect the cable to the negative (-) battery terminal.
(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
LO1-22 (BDL+) - Body ground
|
Ignition switch ON
|
Below 1 V
|
LO1-40 (BDL-) - Body ground
|
Ignition switch ON
|
Below 1 V
|
(e) Turn the ignition switch off.
(f) 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.
(g) Using a service wire, connect terminals 1 (BDL+) and 2 (BDL-) of connector B.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.
(h) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
LO1-22 (BDL+) - LO1-40 (BDL-)
|
Always
|
Below 1 Ω
|
(i) Disconnect the service wire from connector B.
(j) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
LO1-22 (BDL+) - LO1-40 (BDL-)
|
Always
|
1 MΩ or higher
|
LO1-22 (BDL+) - Body ground
|
Always
|
1 MΩ or higher
|
LO1-40 (BDL-) - Body ground
|
Always
|
1 MΩ or higher
|
OK |
|
REPLACE FRONT DOOR WIRE LH
|
NG |
|
REPLACE FLOOR WIRE
|
|