B0122low severityBody
Theft Deterrent Indicator Lamp Circuit
on 1999 Lexus SC 300 3.0L I6 · RWD
What this code means
Malfunction in the theft deterrent system indicator lamp circuit. The security light in the dash does not operate correctly.
Symptoms
- Security light always on
- Security light never illuminates
- Light does not flash when system is armed
- Cannot determine system status
Common causes
- Burnt out indicator LED
- Instrument cluster fault
- BCM indicator output failure
- Wiring issue
Diagnostic steps
- Check indicator lamp operation
- Test BCM indicator output
- Inspect cluster wiring
- Check instrument cluster
Repair notes
Replace indicator lamp/LED in cluster or repair wiring.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open
B0012
Driver Side Airbag Deployment Circuit Short to Ground
B0013
Driver Side Airbag Deployment Circuit Short to Battery