B1570 SOS switch red indicator fault. The telematics transceiver sees an open or short in the red indicator circuit
What does B1570 mean on a Toyota?
B1570. SOS switch red indicator fault. The telematics transceiver sees an open or short in the red indicator circuit. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.
Common causes of B1570
- Open or short in the red indicator circuit
- Failed manual SOS switch
- Loose or corroded switch connector
- Damaged switch harness
- Failed telematics transceiver
How to fix B1570
- Confirm the code and check the SOS switch indicators
- Inspect and reseat the manual SOS switch connector
- Test the red indicator circuit for opens and shorts
- Check the switch operation
- Replace the failed part only after tests fail