Code
APP_W003
TESLA
Tesla Alert
Isa Disabled
Views:
UK: 15
EN: 20
RU: 15
AI status
Completed
Completed
100%
Causes
- Camera, radar or sensor obstruction or contamination
- Module communication fault on CAN/FlexRay network
- Software/firmware bug or incomplete update
- Incorrect driver/settings (feature turned off or region settings)
- Low 12V or main battery voltage preventing ADAS operation
- Hardware failure in ADAS camera, radar, or control module
Symptoms
- Instrument cluster displays 'ISA disabled' or similar warning
- Speed-limit or speed-assist alerts missing or not functioning
- Adaptive or assisted speed features inactive
- Related driver-assist features limited or unavailable
- No camera/radar feed shown in diagnostics or degraded sensor status
What to check
- Confirm the exact message text shown in the instrument cluster or mobile app
- Check owner settings: ensure ISA/Speed Assist is enabled and region settings allow ISA
- Inspect and clean windshield area where front camera is mounted
- Visually inspect radar/lidar sensors for contamination or damage
- Check 12V battery voltage and state of charge; verify HV/12V systems are normal
- Scan all modules for active diagnostic trouble codes and freeze frame data
Signal parameters
- Front camera status (video feed OK / blocked / not detected)
- Radar status (detected / blocked / fault)
- ADAS control module error flags and U-codes
- CAN bus error counters and message frequency for ADAS modules
- 12V battery voltage and ADAS module supply voltages
- GPS fix quality and map/speed-limit data availability
Diagnostic algorithm
- Record the exact instrument-cluster message and note when it occurs (startup, after weather event, after update).
- Scan vehicle with an OEM-capable diagnostic tool; log active and pending DTCs and module communications.
- Check vehicle settings: confirm ISA/Speed Assist is enabled and region/country settings are correct.
- Visually inspect and clean the windshield camera area and any forward sensors; remove obstructions (stickers, snow, dirt).
- Verify 12V and HV battery voltages and check for recent low-voltage events; replace or charge 12V battery if needed.
- Inspect connectors and wiring to camera/ADAS modules for corrosion or poor seating; reseat connectors if necessary.
- Check CAN bus health: monitor for lost messages, bus errors, or module reboots; repair wiring or replace failing module if communications are lost.
- If codes indicate software faults, check for available software updates or reflash ADAS module per OEM procedure; after update, perform calibration if required.
- Clear codes and perform a controlled test drive or ADAS self-check; monitor signals listed under 'signal_params' during verification.
- If problem persists and hardware faults are indicated, replace the affected sensor/module per OEM instructions and re-calibrate sensors.
Likely causes
- Obstructed/dirty front camera or ADAS sensors
- Temporary loss of module communication (CAN bus glitch)
- Recent software update left module in disabled state
- Driver has disabled ISA in vehicle settings
- Low 12V battery voltage or charging system fault
Fault status
Status
ISA disabled — Intelligent Speed Assist is not available. Check sensors, vehicle settings, and module communications.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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