SUPPLEMENTAL RESTRAINT SYSTEMS AIRBAG SYSTEM(for Type A) B1925 Short in Rear P/T Squib (LH) Circuit B1926 Open in Rear P/T Squib (LH) Circuit B1927 Short in Rear P/T Squib (LH) Circuit (to Ground) B1928 Short in Rear P/T Squib (LH) Circuit (to +B)
DESCRIPTION
The rear seat belt pretensioner LH circuit consists of the airbag sensor assembly and No. 3 seat outer belt assembly LH.
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 LH circuit.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Test Mode / Check Mode |
|---|---|---|---|---|---|
| B1925 | Short in Rear P/T Squib (LH) 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 LH circuit during the primary check. ·
A No. 3 seat outer belt assembly LH malfunction. ·
An airbag sensor assembly malfunction. |
·
No. 2 rear seat wire LH ·
Rear seat wire LH ·
Floor wire ·
No. 3 seat outer belt assembly LH ·
Airbag sensor assembly |
Comes on | Applicable |
| B1926 | Open in Rear P/T Squib (LH) Circuit | One of the following conditions is met:
·
The airbag sensor assembly detects an open circuit signal in the rear seat belt pretensioner LH circuit for 2 seconds. ·
A No. 3 seat outer belt assembly LH malfunction. ·
An airbag sensor assembly malfunction. |
·
No. 2 rear seat wire LH ·
Rear seat wire LH ·
Floor wire ·
No. 3 seat outer belt assembly LH ·
Airbag sensor assembly |
Comes on | Applicable |
| B1927 | Short in Rear P/T Squib (LH) 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 LH circuit for 0.5 seconds. ·
A No. 3 seat outer belt assembly LH malfunction. ·
An airbag sensor assembly malfunction. |
·
No. 2 rear seat wire LH ·
Rear seat wire LH ·
Floor wire ·
No. 3 seat outer belt assembly LH ·
Airbag sensor assembly |
Comes on | Applicable |
| B1928 | Short in Rear P/T Squib (LH) 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 LH circuit for 0.5 seconds. ·
A No. 3 seat outer belt assembly LH malfunction. ·
An airbag sensor assembly malfunction. |
·
No. 2 rear seat wire LH ·
Rear seat wire LH ·
Floor wire ·
No. 3 seat outer belt assembly LH ·
Airbag sensor assembly |
Comes on | Applicable |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
After the ignition 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 A)>CHECK MODE PROCEDURE201902,999999,_58,_079257,_0387732,RM100000001H9LF,), 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 LH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire LH |
| *4 | Floor Wire |
Turn the ignition 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 LH 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 LH 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 No. 2 rear seat wire LH connector (on the No. 3 seat outer belt assembly LH side) and 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 floor wire connector and rear seat wire LH 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 LH |
| *2 | Airbag Sensor Assembly |
| *3 | SST |
| *a | Front view of wire harness connector
(to No. 3 Seat Outer Belt Assembly LH) |
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 LH 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 ignition switch to ON, and wait for at least 60 seconds.
Clear the DTCs stored in memory.
- Body Electrical > SRS Airbag > Clear DTCs
- 50002 188
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs.
- Body Electrical > SRS Airbag > Trouble Codes
- 50001 188
- Result:
Proceed to DTCs B1925, B1926, B1927 and B1928 are not output DTC B1925, B1926, B1927 or B1928 is output
- HINT:
-
Codes other than DTC B1925, B1926, B1927 and B1928 may be output at this time, but they are not related to this check.
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect SST from connector G.
DTCs B1925, B1926, B1927 and B1928 are not output
DTC B1925, B1926, B1927 or B1928 is output
| *1 | No. 3 Seat Outer Belt Assembly LH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire LH |
| *4 | No. 2 Rear Seat Wire LH |
| *5 | Floor Wire |
| *a | Front view of wire harness connector
(to No. 3 Seat Outer Belt Assembly LH) |
|
Release the activation prevention mechanism |
Disconnect the 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 ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition v26-1 - Body ground Ignition switch ON Below 1 V v26-2 - Body ground Ignition switch ON Below 1 V
Turn the ignition 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 v26-1 - v26-2 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 v26-1 - Body ground Always 1 MΩ or higher v26-2 - 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 v26-1 - v26-2 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 LH |
| *2 | Airbag Sensor Assembly |
Connect the connectors to the No. 3 seat outer belt assembly LH and airbag sensor assembly.
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Clear the DTCs stored in memory.
- Body Electrical > SRS Airbag > Clear DTCs
- 50002 188
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs.
- Body Electrical > SRS Airbag > Trouble Codes
- 50001 188
- Result:
Proceed to DTCs B1925, B1926, B1927 and B1928 are not output DTC B1925, B1926, B1927 or B1928 is output
- HINT:
-
Codes other than DTC B1925, B1926, B1927 and B1928 may be output at this time, but they are not related to this check.
DTCs B1925, B1926, B1927 and B1928 are not output
DTC B1925, B1926, B1927 or B1928 is output
| *1 | No. 3 Seat Outer Belt Assembly LH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire LH |
| *4 | No. 2 Rear Seat Wire LH |
Disconnect the rear seat wire LH connector from the No. 2 rear seat wire LH.
Check that the connectors (on the rear seat wire LH side and No. 2 rear seat wire LH 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 LH | *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire LH | *4 | No. 2 Rear Seat Wire LH |
| *5 | Floor Wire | - | - |
| *a | Front view of wire harness connector
(to Rear Seat Wire LH) |
- | - |
|
|
Release the activation prevention mechanism | - | - |
Connect the cable to the negative (-) battery terminal.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition wv5-1 - Body ground Ignition switch ON Below 1 V wv5-2 - Body ground Ignition switch ON Below 1 V
Turn the ignition 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 wv5-1 - wv5-2 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 wv5-1 - Body ground Always 1 MΩ or higher wv5-2 - 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 wv5-1 - wv5-2 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 LH |
| *2 | Airbag Sensor Assembly |
| *3 | No. 2 Rear Seat Wire LH |
| *4 | Floor Wire |
Disconnect the No. 2 rear seat wire LH connector from the floor wire.
Check that the connectors (on the No. 2 rear seat wire LH side and floor wire 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 LH | *2 | Airbag Sensor Assembly |
| *3 | No. 2 Rear Seat Wire LH | *4 | Floor Wire |
| *a | Front view of wire harness connector
(to No. 2 Rear Seat Wire LH) |
- | - |
|
|
Release the activation prevention mechanism | - | - |
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition wV2-2 (PLR+) - Body ground Ignition switch ON Below 1 V wV2-3 (PLR-) - Body ground Ignition switch ON Below 1 V
Turn the ignition 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 wV2-2 (PLR+) - wV2-3 (PLR-) 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 wV2-2 (PLR+) - Body ground Always 1 MΩ or higher wV2-3 (PLR-) - 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 wV2-2 (PLR+) - wV2-3 (PLR-) 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 LH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire LH |
| *4 | Floor Wire |
Turn the ignition 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 LH 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 LH 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 No. 2 rear seat wire LH connector (on the No. 3 seat outer belt assembly LH side) and 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 floor wire connector and rear seat wire LH 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 LH |
| *2 | Airbag Sensor Assembly |
| *3 | SST |
| *a | Front view of wire harness connector
(to No. 3 Seat Outer Belt Assembly LH) |
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 LH 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 ignition switch to ON, and wait for at least 60 seconds.
Clear the DTCs stored in memory.
- Body Electrical > SRS Airbag > Clear DTCs
- 50002 188
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs.
- Body Electrical > SRS Airbag > Trouble Codes
- 50001 188
- Result:
Proceed to DTCs B1925, B1926, B1927 and B1928 are not output DTC B1925, B1926, B1927 or B1928 is output
- HINT:
-
Codes other than DTC B1925, B1926, B1927 and B1928 may be output at this time, but they are not related to this check.
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect SST from connector G.
DTCs B1925, B1926, B1927 and B1928 are not output
DTC B1925, B1926, B1927 or B1928 is output
| *1 | No. 3 Seat Outer Belt Assembly LH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire LH |
| *4 | No. 2 Rear Seat Wire LH |
| *5 | Floor Wire |
| *a | Front view of wire harness connector
(to No. 3 Seat Outer Belt Assembly LH) |
|
|
Release the activation prevention mechanism |
Disconnect the 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 ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition v9-1 (RL+) - Body ground Ignition switch ON Below 1 V v9-2 (RL-) - Body ground Ignition switch ON Below 1 V
Turn the ignition 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 v9-1 (RL+) - v9-2 (RL-) 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 v9-1 (RL+) - Body ground Always 1 MΩ or higher v9-2 (RL-) - 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 v9-1 (RL+) - v9-2 (RL-) 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 LH |
| *2 | Airbag Sensor Assembly |
Connect the connectors to the No. 3 seat outer belt assembly LH and airbag sensor assembly.
Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Clear the DTCs stored in memory.
- Body Electrical > SRS Airbag > Clear DTCs
- 50002 188
Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.
Check for DTCs.
- Body Electrical > SRS Airbag > Trouble Codes
- 50001 188
- Result:
Proceed to DTCs B1925, B1926, B1927 and B1928 are not output DTC B1925, B1926, B1927 or B1928 is output
- HINT:
-
Codes other than DTC B1925, B1926, B1927 and B1928 may be output at this time, but they are not related to this check.
DTCs B1925, B1926, B1927 and B1928 are not output
DTC B1925, B1926, B1927 or B1928 is output
| *1 | No. 3 Seat Outer Belt Assembly LH |
| *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire LH |
| *4 | No. 2 Rear Seat Wire LH |
Disconnect the rear seat wire LH connector from the No. 2 rear seat wire LH.
Check that the connectors (on the rear seat wire LH side and No. 2 rear seat wire LH 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 LH | *2 | Airbag Sensor Assembly |
| *3 | Rear Seat Wire LH | *4 | No. 2 Rear Seat Wire LH |
| *5 | Floor Wire | - | - |
| *a | Front view of wire harness connector
(to Rear Seat Wire LH) |
- | - |
|
|
Release the activation prevention mechanism | - | - |
Connect the cable to the negative (-) battery terminal.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition wv4-1 (RL+) - Body ground Ignition switch ON Below 1 V wv4-2 (RL-) - Body ground Ignition switch ON Below 1 V
Turn the ignition 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 wv4-1 (RL+) - wv4-2 (RL-) 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 wv4-1 (RL+) - Body ground Always 1 MΩ or higher wv4-2 (RL-) - 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 wv4-1 (RL+) - wv4-2 (RL-) 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 LH |
| *2 | Airbag Sensor Assembly |
| *3 | No. 2 Rear Seat Wire LH |
| *4 | Floor Wire |
Disconnect the No. 2 rear seat wire LH connector from the floor wire.
Check that the connectors (on the No. 2 rear seat wire LH side and floor wire 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 LH | *2 | Airbag Sensor Assembly |
| *3 | No. 2 Rear Seat Wire LH | *4 | Floor Wire |
| *a | Front view of wire harness connector
(to No. 2 Rear Seat Wire LH) |
- | - |
|
|
Release the activation prevention mechanism | - | - |
Connect the cable to the negative (-) battery terminal.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition wV2-2 (PLR+) - Body ground Ignition switch ON Below 1 V wV2-3 (PLR-) - Body ground Ignition switch ON Below 1 V
Turn the ignition 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 wV2-2 (PLR+) - wV2-3 (PLR-) 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 wV2-2 (PLR+) - Body ground Always 1 MΩ or higher wV2-3 (PLR-) - 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 wV2-2 (PLR+) - wV2-3 (PLR-) 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