SRS Indicator Stays On, But No Dtcs Are Stored, Or Cannot Be Read (2016)
SRS indicator stays on, but no DTCs are stored, or cannot be read
- 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 .
- Before doing this troubleshooting procedure, make sure the 12 volt battery is fully charged - Refer to: 12 Volt Battery Test (Without Auto Idle Stop System) or 12 Volt Battery Test (With Auto Idle Stop System) . If the 12 volt battery voltage is low, SRS indicator may stay on.
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures , General Troubleshooting Information , and 12 Volt Battery Terminal Disconnection and Reconnection .
- PGM-FI system check
- 1. Start the engine, and see if the malfunction indicator lamp (MIL) also stays on.
Does the MIL stay on longer than 30 seconds?
YES
Go to the Fuel and Emissions Systems General Troubleshooting Information - Refer to: How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the A/T System (6-Speed A/T), or How to Troubleshoot the Brake Booster Pressure Monitoring System .
NO
Go to step 2.
- System check 1
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Connect the HDS to the data link connector (DLC).
- 3. Turn the vehicle to the ON mode.
- 4. Check for communication to the SRS with the HDS.
Does the HDS communicate with the SRS unit?
YES
Go to step 3.
NO
Go to step 6.
- DTC check
- 1. Check for DTCs with the HDS.
DTC Description DTC Are any SRS DTCs indicated?
YES
Go to SRS DTC troubleshooting.
NO
Go to step 4.
- Body electrical system DTC check
- 1. Check for body electrical DTCs with the HDS.
DTC Description DTC U0151 Gauge control module lost communication with SRS unit Is DTC U0151 indicated?
YES
Go to DTC U0151 troubleshooting - Refer to: DTC Troubleshooting .
NO
Go to step 5.
- Gauge control module check
- 1. Do the gauge control module self-diagnostic function.
Self diagnostic function
Does the SRS indicator blink Ω
YES
Replace the SRS unit - Refer to: SRS Unit Removal and Installation (2017 2018 2019 2020 2021), or SRS Unit Removal and Installation (2016) .
NO
- Fuse check
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Check the following fuse.
Fuse No. C10 (10 A) Location Under-dash fuse/relay box Are the fuse OK?
YES
Go to step 7.
NO
Replace the fuse, then turn the vehicle to the ON mode. If the fuse blows again, check for a short to ground in the under-dash fuse/relay box No. C10 fuse circuit (dashboard wire harness); replace the dashboard wire harness, and retest. If the problem is still present, Replace The Under-Dash Fuse/Relay Box .
- Connector connection check
- 1. Check the following connector connections.
SRS unit connector A (39P) Under-dash fuse/relay box connector J (4P) Are the connectors OK?
YES
Go to step 9.
NO
Go to step 8.
- System check 3
- 1. Reset the loose connectors which was cause of the problem in step 7.
- 2. Turn the vehicle to the ON mode, and check that the SRS indicator comes on for about 6 seconds and then goes off.
Does the SRS indicator come on for about 6 seconds and then goes off?
YES
The vehicle is OK at this time.
NO
Turn the vehicle to the OFF (LOCK) mode, go to step 9.
- Open wire check (VB line)
- 1. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.
- 2. Disconnect the following connector:
SRS unit connector A (39P) - 3. Reconnect the negative cable to the 12 volt battery.
- 4. Turn the vehicle to the ON mode.
- 5. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode SRS unit connector A (39P): disconnected Test point 1 SRS unit connector A (39P) No. 39 - Refer to: Unit Connector for Inputs and Outputs (2019 2020 2021), or Unit Connector for Inputs and Outputs (2017 2018), or Unit Connector for Inputs and Outputs (2016) . Test point 2 Body ground Is there battery voltage?
YES
The VB wire is OK. Go to step 10.
NO
Open in the dashboard wire harness or faulty under-dash fuse/relay box; replace the dashboard wire harness or the under-dash fuse/relay box .
- Open wire check (SGND line)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode SRS unit connector A (39P): disconnected Test point 1 SRS unit connector A (39P) No. 37 - Refer to: Unit Connector for Inputs and Outputs (2019 2020 2021), or Unit Connector for Inputs and Outputs (2017 2018), or Unit Connector for Inputs and Outputs (2016) . Test point 2 Body ground Is there 1.0 Ω or less?
YES
The SGND wire is OK. Replace the SRS unit - Refer to: SRS Unit Removal and Installation (2017 2018 2019 2020 2021), or SRS Unit Removal and Installation (2016) .
NO
Open in the dashboard wire harness; check for a poor ground at G403. If the ground is OK, replace the dashboard wire harness.