SUPPLEMENTAL RESTRAINT SYSTEMS AIRBAG SYSTEM(for Type C) B1920 Short in Rear P/T Squib (RH) Circuit B1921 Open in Rear P/T Squib (RH) Circuit B1922 Short in Rear P/T Squib (RH) Circuit (to Ground) B1923 Short in Rear P/T Squib (RH) Circuit (to +B)
DESCRIPTION
The rear seat belt pretensioner RH circuit consists of the airbag sensor assembly and No. 3 seat outer belt assembly RH.
This circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the rear seat belt pretensioner RH circuit.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Test Mode / Check Mode |
|---|---|---|---|---|---|
| B1920 | Short in Rear P/T Squib (RH) Circuit | One of the following conditions is met:
·
The airbag sensor assembly detects a line short circuit signal 5 times in the rear seat belt pretensioner RH circuit during the primary check. ·
A No. 3 seat outer belt assembly RH malfunction. ·
An airbag sensor assembly malfunction. |
·
No. 2 rear seat wire RH ·
Rear seat wire RH ·
No. 2 floor wire ·
No. 3 seat outer belt assembly RH ·
Airbag sensor assembly |
Comes on | Applicable |
| B1921 | Open in Rear P/T Squib (RH) Circuit | One of the following conditions is met:
·
The airbag sensor assembly detects an open circuit signal in the rear seat belt pretensioner RH circuit for 2 seconds. ·
A No. 3 seat outer belt assembly RH malfunction. ·
An airbag sensor assembly malfunction. |
·
No. 2 rear seat wire RH ·
Rear seat wire RH ·
No. 2 floor wire ·
No. 3 seat outer belt assembly RH ·
Airbag sensor assembly |
Comes on | Applicable |
| B1922 | Short in Rear P/T Squib (RH) Circuit (to Ground) | One of the following conditions is met:
·
The airbag sensor assembly detects a short circuit to ground signal in the rear seat belt pretensioner RH circuit for 0.5 seconds. ·
A No. 3 seat outer belt assembly RH malfunction. ·
An airbag sensor assembly malfunction. |
·
No. 2 rear seat wire RH ·
Rear seat wire RH ·
No. 2 floor wire ·
No. 3 seat outer belt assembly RH ·
Airbag sensor assembly |
Comes on | Applicable |
| B1923 | Short in Rear P/T Squib (RH) Circuit (to +B) | One of the following conditions is met:
·
The airbag sensor assembly detects a short circuit to B+ signal in the rear seat belt pretensioner RH circuit for 0.5 seconds. ·
A No. 3 seat outer belt assembly RH malfunction. ·
An airbag sensor assembly malfunction. |
·
No. 2 rear seat wire RH ·
Rear seat wire RH ·
No. 2 floor wire ·
No. 3 seat outer belt assembly RH ·
Airbag sensor assembly |
Comes on | Applicable |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
After the engine switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.
·When disconnecting and reconnecting the battery
- HINT:
-
When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.
·After replacing the airbag sensor assembly, refer to initialization.
- HINT:
-
To perform the simulation method, enter check mode (signal check) with the GTS (Click here Vehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type C)>CHECK MODE PROCEDURE201906,999999,_58,_079257,_0396679,RM100000001IJ89,), and then wiggle each connector of the airbag system or drive the vehicle on various types of road (Click here General>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING201902,999999,_V1,_078841,_0386803,RM100000001GTWY,).
PROCEDURE
Check vehicle condition.
- Result:
Proceed to w/o Power Seat w/ Power Seat
w/o Power Seat
w/ Power Seat
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire RH |
| *4 | No. 2 Floor Wire |
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Check that the connectors are properly connected to the No. 3 seat outer belt assembly RH and airbag sensor assembly.
- OK:
The connectors are properly connected.
- HINT:
-
If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.
Disconnect the connectors from the No. 3 seat outer belt assembly RH and airbag sensor assembly.
Check that the terminals of the connectors are not deformed or damaged.
- OK:
The terminals are not deformed or damaged.
Check that the rear seat wire RH connector (on the No. 3 seat outer belt assembly RH side) and No. 2 floor wire (on the airbag sensor assembly side) is not loose, deformed or damaged.
- OK:
The connector locking button is not disengaged, and the claw of the lock is not deformed or damaged.
Check that the short springs of the activation prevention mechanism of the No. 2 floor wire connector and rear seat wire RH connector are not deformed or damaged.
- OK:
The short springs are not deformed or damaged.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
| *3 | SST |
| *a | Front view of wire harness connector
(to No. 3 Seat Outer Belt Assembly RH) |
Connect the connector to the airbag sensor assembly.
Connect the white wire side of SST (resistance: 2.1 Ω) to connector G.
- CAUTION:
-
Never connect the tester to the No. 3 seat outer belt assembly RH for measurement, as this may lead to a serious injury due to airbag deployment.
- NOTICE:
- ·
Do not forcibly insert SST into the terminals of the connector when connecting SST.
·Insert SST straight into the terminals of the connector.
- SST
- 09843-18061
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Clear the DTCs stored in memory.
- Body Electrical > SRS Airbag > Clear DTCs
- 50002 188
Turn the engine switch off.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Check for DTCs.
- Body Electrical > SRS Airbag > Trouble Codes
- 50001 188
- Result:
Proceed to DTCs B1920, B1921, B1922 and B1923 are not output DTC B1920, B1921, B1922 or B1923 is output
- HINT:
-
Codes other than DTC B1920, B1921, B1922 and B1923 may be output at this time, but they are not related to this check.
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect SST from connector G.
DTCs B1920, B1921, B1922 and B1923 are not output
DTC B1920, B1921, B1922 or B1923 is output
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire RH |
| *4 | No. 2 Rear Seat Wire RH |
| *5 | No. 2 Floor Wire |
| *a | Front view of wire harness connector
(to No. 3 Seat Outer Belt Assembly RH) |
|
Release the activation prevention mechanism |
Disconnect the No. 2 floor wire from the airbag sensor assembly.
Check for a short to B+ in the circuit.
Connect the cable to the negative (-) battery terminal.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition v29-1 - Body ground Engine switch on (IG) Below 1 V v29-2 - Body ground Engine switch on (IG) Below 1 V
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Check for an open in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition v29-1 - v29-2 Always Below 1 Ω
Check for a short to ground in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition v29-1 - Body ground Always 1 MΩ or higher v29-2 - Body ground Always 1 MΩ or higher
Check for a short in the circuit.
Release the activation prevention mechanism built into connector B.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition v29-1 - v29-2 Always 1 MΩ or higher
Restore the released activation prevention mechanism of connector B to the original condition.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
Connect the connectors to the No. 3 seat outer belt assembly RH and airbag sensor assembly.
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Clear the DTCs stored in memory.
- Body Electrical > SRS Airbag > Clear DTCs
- 50002 188
Turn the engine switch off.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Check for DTCs.
- Body Electrical > SRS Airbag > Trouble Codes
- 50001 188
- Result:
Proceed to DTCs B1920, B1921, B1922 and B1923 are not output DTC B1920, B1921, B1922 or B1923 is output
- HINT:
-
Codes other than DTC B1920, B1921, B1922 and B1923 may be output at this time, but they are not related to this check.
DTCs B1920, B1921, B1922 and B1923 are not output
DTC B1920, B1921, B1922 or B1923 is output
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire RH |
| *4 | No. 2 Rear Seat Wire RH |
Disconnect the rear seat wire RH connector from the No. 2 rear seat wire RH.
Check that the connectors (on the rear seat wire RH side and No. 2 rear seat wire RH side) are not damaged.
- Result:
Proceed to The connectors are not deformed or damaged The connectors are deformed or damaged
The connectors are not deformed or damaged
The connectors are deformed or damaged
Check for a short to B+ in the circuit.
| *1 | No. 3 Seat Outer Belt Assembly RH | *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire RH | *4 | No. 2 Rear Seat Wire RH |
| *5 | No. 2 Floor Wire | - | - |
| *a | Front view of wire harness connector
(to Rear Seat Wire RH) |
- | - |
|
|
Release the activation prevention mechanism | - | - |
Connect the cable to the negative (-) battery terminal.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition wv8-1 - Body ground Engine switch on (IG) Below 1 V wv8-2 - Body ground Engine switch on (IG) Below 1 V
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Check for an open in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wv8-1 - wv8-2 Always Below 1 Ω
Check for a short to ground in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wv8-1 - Body ground Always 1 MΩ or higher wv8-2 - Body ground Always 1 MΩ or higher
Check for a short in the circuit.
Release the activation prevention mechanism built into connector B.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wv8-1 - wv8-2 Always 1 MΩ or higher
Restore the released activation prevention mechanism of connector B to the original condition.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
| *3 | No. 2 Rear Seat Wire RH |
| *4 | No. 2 Floor Wire |
Disconnect the No. 2 floor wire from the No. 2 rear seat wire RH.
Check that the connectors (on the No. 2 floor wire side and No. 2 rear seat wire RH side) are not damaged.
- Result:
Proceed to The connectors are not deformed or damaged The connectors are deformed or damaged
The connectors are not deformed or damaged
The connectors are deformed or damaged
Check for a short to B+ in the circuit.
| *1 | No. 3 Seat Outer Belt Assembly RH | *2 | Airbag Sensor Assembly |
| *3 | No. 2 Rear Seat Wire RH | *4 | No. 2 Floor Wire |
| *a | Front view of wire harness connector
(to No. 2 Rear Seat Wire RH) |
- | - |
|
|
Release the activation prevention mechanism | - | - |
Connect the cable to the negative (-) battery terminal.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition wW2-2 (PRR+) - Body ground Engine switch on (IG) Below 1 V wW2-3 (PRR-) - Body ground Engine switch on (IG) Below 1 V
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Check for an open in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wW2-2 (PRR+) - wW2-3 (PRR-) Always Below 1 Ω
Check for a short to ground in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wW2-2 (PRR+) - Body ground Always 1 MΩ or higher wW2-3 (PRR-) - Body ground Always 1 MΩ or higher
Check for a short in the circuit.
Release the activation prevention mechanism built into connector B.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wW2-2 (PRR+) - wW2-3 (PRR-) Always 1 MΩ or higher
Restore the released activation prevention mechanism of connector B to the original condition.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire RH |
| *4 | No. 2 Floor Wire |
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Check that the connectors are properly connected to the No. 3 seat outer belt assembly RH and airbag sensor assembly.
- OK:
The connectors are properly connected.
- HINT:
-
If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.
Disconnect the connectors from the No. 3 seat outer belt assembly RH and airbag sensor assembly.
Check that the terminals of the connectors are not deformed or damaged.
- OK:
The terminals are not deformed or damaged.
Check that the rear seat wire RH connector (on the No. 3 seat outer belt assembly RH side) and No. 2 floor wire (on the airbag sensor assembly side) is not loose, deformed or damaged.
- OK:
The connector locking button is not disengaged, and the claw of the lock is not deformed or damaged.
Check that the short springs of the activation prevention mechanism of the No. 2 floor wire connector and rear seat wire RH connector are not deformed or damaged.
- OK:
The short springs are not deformed or damaged.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
| *3 | SST |
| *a | Front view of wire harness connector
(to No. 3 Seat Outer Belt Assembly RH) |
Connect the connector to the airbag sensor assembly.
Connect the white wire side of SST (resistance: 2.1 Ω) to connector G.
- CAUTION:
-
Never connect the tester to the No. 3 seat outer belt assembly RH for measurement, as this may lead to a serious injury due to airbag deployment.
- NOTICE:
- ·
Do not forcibly insert SST into the terminals of the connector when connecting SST.
·Insert SST straight into the terminals of the connector.
- SST
- 09843-18061
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Clear the DTCs stored in memory.
- Body Electrical > SRS Airbag > Clear DTCs
- 50002 188
Turn the engine switch off.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Check for DTCs.
- Body Electrical > SRS Airbag > Trouble Codes
- 50001 188
- Result:
Proceed to DTCs B1920, B1921, B1922 and B1923 are not output DTC B1920, B1921, B1922 or B1923 is output
- HINT:
-
Codes other than DTC B1920, B1921, B1922 and B1923 may be output at this time, but they are not related to this check.
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect SST from connector G.
DTCs B1920, B1921, B1922 and B1923 are not output
DTC B1920, B1921, B1922 or B1923 is output
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire RH |
| *4 | No. 2 Rear Seat Wire RH |
| *5 | No. 2 Floor Wire |
| *a | Front view of wire harness connector
(to No. 3 Seat Outer Belt Assembly RH) |
|
|
Release the activation prevention mechanism |
Disconnect the No. 2 floor wire from the airbag sensor assembly.
Check for a short to B+ in the circuit.
Connect the cable to the negative (-) battery terminal.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition v2-1 (RR+) - Body ground Engine switch on (IG) Below 1 V v2-2 (RR-) - Body ground Engine switch on (IG) Below 1 V
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Check for an open in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition v2-1 (RR+) - v2-2 (RR-) Always Below 1 Ω
Check for a short to ground in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition v2-1 (RR+) - Body ground Always 1 MΩ or higher v2-2 (RR-) - Body ground Always 1 MΩ or higher
Check for a short in the circuit.
Release the activation prevention mechanism built into connector B.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition v2-1 (RR+) - v2-2 (RR-) Always 1 MΩ or higher
Restore the released activation prevention mechanism of connector B to the original condition.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
Connect the connectors to the No. 3 seat outer belt assembly RH and airbag sensor assembly.
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Clear the DTCs stored in memory.
- Body Electrical > SRS Airbag > Clear DTCs
- 50002 188
Turn the engine switch off.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Check for DTCs.
- Body Electrical > SRS Airbag > Trouble Codes
- 50001 188
- Result:
Proceed to DTCs B1920, B1921, B1922 and B1923 are not output DTC B1920, B1921, B1922 or B1923 is output
- HINT:
-
Codes other than DTC B1920, B1921, B1922 and B1923 may be output at this time, but they are not related to this check.
DTCs B1920, B1921, B1922 and B1923 are not output
DTC B1920, B1921, B1922 or B1923 is output
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire RH |
| *4 | No. 2 Rear Seat Wire RH |
Disconnect the rear seat wire RH connector from the No. 2 rear seat wire RH.
Check that the connectors (on the rear seat wire RH side and No. 2 rear seat wire RH side) are not damaged.
- Result:
Proceed to The connectors are not deformed or damaged The connectors are deformed or damaged
The connectors are not deformed or damaged
The connectors are deformed or damaged
Check for a short to B+ in the circuit.
| *1 | No. 3 Seat Outer Belt Assembly RH | *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire RH | *4 | No. 2 Rear Seat Wire RH |
| *5 | No. 2 Floor Wire | - | - |
| *a | Front view of wire harness connector
(to Rear Seat Wire RH) |
- | - |
|
|
Release the activation prevention mechanism | - | - |
Connect the cable to the negative (-) battery terminal.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition wv2-1 (RR+) - Body ground Engine switch on (IG) Below 1 V wv2-2 (RR-) - Body ground Engine switch on (IG) Below 1 V
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Check for an open in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wv2-1 (RR+) - wv2-2 (RR-) Always Below 1 Ω
Check for a short to ground in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wv2-1 (RR+) - Body ground Always 1 MΩ or higher wv2-2 (RR-) - Body ground Always 1 MΩ or higher
Check for a short in the circuit.
Release the activation prevention mechanism built into connector B.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wv2-1 (RR+) - wv2-2 (RR-) Always 1 MΩ or higher
Restore the released activation prevention mechanism of connector B to the original condition.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 3 Seat Outer Belt Assembly RH |
| *2 | Airbag Sensor Assembly |
| *3 | No. 2 Rear Seat Wire RH |
| *4 | No. 2 Floor Wire |
Disconnect the No. 2 floor wire from the No. 2 rear seat wire RH.
Check that the connectors (on the No. 2 floor wire side and No. 2 rear seat wire RH side) are not damaged.
- Result:
Proceed to The connectors are not deformed or damaged The connectors are deformed or damaged
The connectors are not deformed or damaged
The connectors are deformed or damaged
Check for a short to B+ in the circuit.
| *1 | No. 3 Seat Outer Belt Assembly RH | *2 | Airbag Sensor Assembly |
| *3 | No. 2 Rear Seat Wire RH | *4 | No. 2 Floor Wire |
| *a | Front view of wire harness connector
(to No. 2 Rear Seat Wire RH) |
- | - |
|
|
Release the activation prevention mechanism | - | - |
Connect the cable to the negative (-) battery terminal.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition wW2-2 (PRR+) - Body ground Engine switch on (IG) Below 1 V wW2-3 (PRR-) - Body ground Engine switch on (IG) Below 1 V
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Check for an open in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wW2-2 (PRR+) - wW2-3 (PRR-) Always Below 1 Ω
Check for a short to ground in the circuit.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wW2-2 (PRR+) - Body ground Always 1 MΩ or higher wW2-3 (PRR-) - Body ground Always 1 MΩ or higher
Check for a short in the circuit.
Release the activation prevention mechanism built into connector B.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition wW2-2 (PRR+) - wW2-3 (PRR-) Always 1 MΩ or higher
Restore the released activation prevention mechanism of connector B to the original condition.
- Result:
Proceed to OK NG
OK
NG