DTC B0091-87: No Signal From the Left Side Impact Sensor (first); DTC B0092-87: No Signal From the Left Side Impact Sensor (second) (2018-19)
NOTE:
Before doing this troubleshooting procedure:
- Find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components of the correct part number, and that they were properly installed - Refer to: SRS Component Replacement/Inspection After Deployment .
- Review SRS Precautions and Procedures .
- Review General Troubleshooting Information
- Review information pertaining to 12 Volt Battery Terminal Disconnection and Reconnection
| DTC Description | DTC |
|---|---|
| B0091-87 No signal from the left side impact sensor (first) | |
| B0092-87 No signal from the left side impact sensor (second) |
DTC (SRS)
- DTC check
-1. Clear the DTCs with the HDS.
- 2. Turn the vehicle to the ON mode, then wait for 10 seconds.
- 3. Check for DTCs with the HDS.
DTC Description DTC B0091-4A Internal failure of the left side impact sensor (first) B0091-87 No signal from the left side impact sensor (first) B0091-92 Internal failure of the left side impact sensor (first) B0092-4A Internal failure of the left side impact sensor (second) B0092-87 No signal from the left side impact sensor (second) B0092-92 Internal failure of the left side impact sensor (second) Are DTCs indicated?
DTC B0091-87
Go to step 2.
DTC B0092-87
Go to step 12.
DTC B0091-4A or B0091-92
Replace the left side impact sensor (first) (Refer to: Side Impact Sensor (First) Removal and Installation ), then clear the DTC.
DTC B0092-4A or B0092-92
Replace the left side impact sensor (second) (Refer to: Side Impact Sensor (Second) Removal and Installation ) then clear the DTC.
NO DTC
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.
- Connector connection check
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Check the following connections.
SRS unit connector B (39P) Left side impact sensor (first) 4P connector (on the right side wire harness) Left side impact sensor (second) 2P connector (on the right side wire harness) Are the connectors OK?
YES
Go to step 4.
NO
Go to step 3.
- System check
-1. Reset the loose connections that caused the problem in step 2.
- 2. Clear the DTCs with the HDS.
- 3. Turn the vehicle to the ON mode, then wait for 10 seconds.
- 4. Check for DTCs with the HDS.
DTC Description DTC B0091-87 No signal from the left side impact sensor (first) Is DTC B0091-87 indicated?
YES
Turn the vehicle to the OFF (LOCK) mode, then go to step 4.
NO
The system is OK at this time.
- Left side impact sensor (first) substituting
-1. Substitute a known-good left side impact sensor (first).
- 2. Reconnect the negative cable to the 12 volt battery.
- 3. Clear the DTCs with the HDS.
- 4. Turn the vehicle to the ON mode, then wait for 10 seconds.
- 5. Check for DTCs with the HDS.
DTC Description DTC B0091-87 No signal from the left side impact sensor (first) Is DTC B0091-87 indicated?
YES
Go to step 5.
NO
Replace the left side impact sensor (first) (Refer to: Side Impact Sensor (First) Removal and Installation ), then clear the DTC.
- Shorted wire check (LS1+ line to LS1- line)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.
- 3. Return the left side impact sensor (first) which was replaced.
- 4. Disconnect the following connectors.
SRS unit connector B (39P) Left side impact sensor (first) 4P connector (on the right side wire harness) Left side impact sensor (second) 2P connector (on the right side wire harness) - 5. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode SRS unit connector B (39P): disconnected Left side impact sensor (first) 4P connector (on the right side wire harness): disconnected Left side impact sensor (second) 2P connector (on the right side wire harness): disconnected Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 2 (on the right side wire harness): Test point 2 Left side impact sensor (first) 4P connector (female terminals) No. 3 (on the right side wire harness): Is there an open circuit, or at least 1 MΩ?
YES
The LS1+ and LS1- wires are not shorted. Go to step 6.
NO
Short to another wire in the right side wire harness between the SRS unit and the left side impact sensor (first); replace the right side wire harness, then clear the DTC.
- Shorted wire check (LS2+ line to LS2- line)
-1. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode SRS unit connector B (39P): disconnected Left side impact sensor (first) 4P connector (on the right side wire harness): disconnected Left side impact sensor (second) 2P connector (on the right side wire harness): disconnected Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 1 (on the right side wire harness): Test point 2 Left side impact sensor (first) 4P connector (female terminals) No. 4 (on the right side wire harness): Is there an open circuit, or at least 1 MΩ?
YES
The LS2+ and LS2- wires are not shorted. Go to step 7.
NO
Short to another wire in the right side wire harness between the left side impact sensor (first) and the left side impact sensor (second); replace the right side wire harness, then clear the DTC.
- Shorted wire check (LS1+, LS1- lines)
-1. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode SRS unit connector B (39P): disconnected Left side impact sensor (first) 4P connector (on the right side wire harness): disconnected Left side impact sensor (second) 2P connector (on the right side wire harness): disconnected Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 2 (on the right side wire harness): Test point 2 Body ground Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 3 (on the right side wire harness): Test point 2 Body ground Is there an open circuit, or at least 1 MΩ?
YES
The LS1+ and LS1- wires are not shorted. Go to step 8.
NO
Short to ground in the right side wire harness between the SRS unit and the left side impact sensor (first); replace the right side wire harness, then clear the DTC.
- Shorted wire check (LS2+, LS2- lines)
-1. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode SRS unit connector B (39P): disconnected Left side impact sensor (first) 4P connector (on the right side wire harness): disconnected Left side impact sensor (second) 2P connector (on the right side wire harness): disconnected Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 1 (on the right side wire harness): Test point 2 Body ground Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 4 (on the right side wire harness): Test point 2 Body ground Is there an open circuit, or at least 1 MΩ?
YES
The LS2+ and LS2- wires are not shorted. Go to step 9.
NO
Short to ground in the right side wire harness between the left side impact sensor (first) and the left side impact sensor (second); replace the right side wire harness, then clear the DTC.
- Shorted wire check (LS1+, LS1- lines to power)
-1. Reconnect the negative cable to the 12 volt battery.
- 2. Turn the vehicle to the ON mode.
- 3. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode SRS unit connector B (39P): disconnected Left side impact sensor (first) 4P connector (on the right side wire harness): disconnected Left side impact sensor (second) 2P connector (on the right side wire harness): disconnected Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 3 (on the right side wire harness): Test point 2 Body ground Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 2 (on the right side wire harness): Test point 2 Body ground Is there 0.2 V or less?
YES
The LS1+ and LS1- wires are not shorted to power. Go to step 10.
NO
Short to power in the right side wire harness between the SRS unit and the left side impact sensor (first); replace the right side wire harness, then clear the DTC.
- Shorted wire check (LS2+, LS2- lines to power)
-1. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode SRS unit connector B (39P): disconnected Left side impact sensor (first) 4P connector (on the right side wire harness): disconnected Left side impact sensor (second) 2P connector (on the right side wire harness): disconnected Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 1 (on the right side wire harness): Test point 2 Body ground Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 4 (on the right side wire harness): Test point 2 Body ground Is there 0.2 V or less?
YES
The LS2+ and LS2- wires are not shorted to power. Go to step 11.
NO
Short to power in the right side wire harness between the left side impact sensor (first) and the left side impact sensor (second); replace the right side wire harness, then clear the DTC.
- Open wire check (LS1+, LS1- lines)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Connect terminals A and B with a jumper wire.
Terminal A SRS unit connector B (39P) No. 38 - Refer to: SRS Unit Connector for Inputs and Outputs Terminal B SRS unit connector B (39P) No. 39 - Refer to: SRS Unit Connector for Inputs and Outputs - 3. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode SRS unit connector B (39P): disconnected Left side impact sensor (first) 4P connector (on the right side wire harness): disconnected Left side impact sensor (second) 2P connector (on the right side wire harness): disconnected SRS unit connector B (39P) terminals No. 38 and No. 39: jumped Test point 1 Left side impact sensor (first) 4P connector (female terminals) No. 2 (on the right side wire harness): Test point 2 Left side impact sensor (first) 4P connector (female terminals) No. 3 (on the right side wire harness): Is there 1.0 Ω or less?
YES
The LS1+ and LS1- wires are OK. Disconnect and reconnect the connector, and then check the DTC again. If the DTC is still present, check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the SRS unit - Refer to: SRS Unit Removal and Installation .
NO
Open in the right side wire harness between the SRS unit and the left side impact sensor (first); replace the right side wire harness, then clear the DTC.
- Connector connection check
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Check the following connections.
SRS unit connector B (39P) Left side impact sensor (first) 4P connector (on the right side wire harness) Left side impact sensor (second) 2P connector (on the right side wire harness) Are the connectors OK?
YES
Go to step 14.
NO
Go to step 13.
- System check
-1. Reset the loose connections that caused the problem in step 12.
- 2. Clear the DTCs with the HDS.
- 3. Turn the vehicle to the ON mode, then wait for 10 seconds.
- 4. Check for DTCs with the HDS.
DTC Description DTC B0092-87 No signal from the left side impact sensor (second) Is DTC B0092-87 indicated?
YES
Turn the vehicle to the OFF (LOCK) mode, then go to step 14.
NO
The system is OK at this time.
- Open wire check (LS2+, LS2- lines)
-1. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.
- 2. Disconnect the following connectors.
Left side impact sensor (first) 4P connector (on the right side wire harness) Left side impact sensor (second) 2P connector (on the right side wire harness) - 3. Connect terminals A and B with a jumper wire.
Terminal A Left side impact sensor (first) 4P connector (female terminals) No. 1 (on the right side wire harness): Terminal B Left side impact sensor (first) 4P connector (female terminals) No. 4 (on the right side wire harness): - 4. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Left side impact sensor (first) 4P connector (on the right side wire harness): disconnected Left side impact sensor (second) 2P connector (on the right side wire harness): disconnected Left side impact sensor (first) 4P connector terminals No. 1 and No. 4 (on the right side wire harness): jumped Test point 1 Left side impact sensor (second) 2P connector (female terminals) No. 1 (on the right side wire harness): Test point 2 Left side impact sensor (second) 2P connector (female terminals) No. 2 (on the right side wire harness): Is there 1.0 Ω or less?
YES
The LS2+ and LS2- wires are OK. Replace the left side impact sensor (second) (Refer to: Side Impact Sensor (Second) Removal and Installation ), then clear the DTC.
NO
Open in the right side wire harness between the left side impact sensor (first) and the left side impact sensor (second); replace the right side wire harness, then clear the DTC.