Error code · Body and airbags

B1650: what it means for Toyota, Lexus, Hyundai, Kia

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Meaning for specific makes

The same number can mean different things for different makes. Below is the make-specific meaning.

Toyota, Lexus: SRS: occupant classification system malfunction

Don’t put off the repair

A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.

Possible causes

What you can do yourself

  1. You can drive, but don’t put off the repair: the airbags may not deploy in a crash.
  2. Don’t test squibs or airbags with a multimeter and don’t take them apart: the airbag can deploy and injure you. Touch the connectors only with the battery terminal disconnected and after waiting several minutes. Don’t fit airbag “emulators”: there will be no protection in a crash.
  3. Check the connectors under the seats: disconnect the battery terminal, wait several minutes, then see whether the connectors are clipped in and free of corrosion.
  4. Don’t put heavy items on the passenger seat: the system can misjudge whether someone is sitting there.
  5. If the seat was removed or its parts replaced, the occupant classification system is calibrated with a scan tool (weight sensor zero point).
OOleg’s tip: check the connector

Often the cause is simple — there is no contact in the connector (plug). Look at the connector from the back: remove the rubber seal and you will see whether a wire is corroded or has come off completely. Corrosion shows up as green deposits. Ideally, gently pull each wire towards you one at a time: a sound wire stays in place, while a corroded one simply comes off — it needs to be repaired.

Unplug and inspect connectors with the ignition off.

This is the Toyota and Lexus meaning. On other makes this number means something else: if your car isn’t a Toyota or Lexus, change the make at the top.

Source: obdadvisor.com (Toyota manufacturer codes)

Open in the app for Toyota

Hyundai, Kia: SRS: crash recorded (front, 1st stage only)

Don’t put off the repair

A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.

Possible causes

What you can do yourself

  1. You can drive, but don’t put off the repair: the airbags may not deploy in a crash.
  2. Don’t test squibs or airbags with a multimeter and don’t take them apart: the airbag can deploy and injure you. Touch the connectors only with the battery terminal disconnected and after waiting several minutes. Don’t fit airbag “emulators”: there will be no protection in a crash.
  3. After a crash, deployed airbags and pretensioners are replaced, and the SRS unit is restored or replaced.
  4. A crash code does not clear: after the airbags deploy, the SRS unit is replaced or restored.

This is the Hyundai and Kia meaning. On other makes this number means something else: if your car isn’t a Hyundai or Kia, change the make at the top.

Source: Kia DTC charts: Forte TD, Sedona VQ, Optima JF (NHTSA EA19-001, static.nhtsa.gov)

Open in the app for Hyundai

Need a mechanic’s help?

Couldn’t fix it yourself? Oleg, an auto electrician, does computer diagnostics and repairs: he comes out anywhere in Almaty or sees you at his workshop.

Car computer diagnostics in AlmatyCall: +7 701 121 11 10

Want to figure it out yourself?

Oleg’s course “Car computer diagnostics with a scan tool”: how to hook up a scanner, read codes and live data, and use them to find the cause. The first lessons are free.

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Who keeps this reference

The reference is kept by Oleg Dmitriev, an auto electrician from Almaty with 26 years of experience: computer diagnostics of cars and trucks, repair of control units (ECUs). Can’t find the cause? Message him.

Oleg’s auto electrician websiteWhatsApp +7 701 121 11 10