APP_w140 — Backup Cam Init Fault

Full alert identifier: APP_w140_backupCamInitFault

Alert description

When the Autopilot electronic control unit (ECU) boots, the backup camera is unable to initialize.

Potential impact

Autopilot features are unavailable or limited. Rear view (backup) camera feed is blank on the touchscreen, in dashcam recordings, and in Sentry mode recordings.

Set condition

When the Autopilot ECU boots, communication cannot be established with the backup camera.

Clear condition

Communication issue is rectified with the backup camera, ECU is rebooted, and camera is initialized.

Signals to check

These diagnostic fields are associated with APP_w140. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Backup Cam CSI Bridge Flt `APP_sw140_backupCamCSIBridgeFlt` 0 NO I2C FAULT 1 I2C BUS FAULT 2 I2C SLAVE ADDR NACK 3 I2C DATA NACK 4 I2C UNKNOWN IOCTL ERR	—
Backup Cam Deser Fault `APP_sw140_backupCamDeserFault` 0 NO I2C FAULT 1 I2C BUS FAULT 2 I2C SLAVE ADDR NACK 3 I2C DATA NACK 4 I2C UNKNOWN IOCTL ERR	—
Backup Cam Deser Lock `APP_sw140_backupCamDeserLock` 0 LOCKED 1 LOST 2 UNKNOWN	—
Backup Cam HDMI Ser Fault `APP_sw140_backupCamHDMISerFault`	—
Backup Cam I 2 Cbus Fault `APP_sw140_backupCamI2CbusFault`	—
Backup Cam SX Deser Failed `APP_sw140_backupCamSXDeserFailed`	—
Backup Cam Sensor Fault `APP_sw140_backupCamSensorFault` 0 NO I2C FAULT 1 I2C BUS FAULT 2 I2C SLAVE ADDR NACK 3 I2C DATA NACK 4 I2C UNKNOWN IOCTL ERR	—
Backup Cam Ser Fault `APP_sw140_backupCamSerFault` 0 NO I2C FAULT 1 I2C BUS FAULT 2 I2C SLAVE ADDR NACK 3 I2C DATA NACK 4 I2C UNKNOWN IOCTL ERR	—

Show 1 more field

Signal	Unit
Backup Cam UAR Tbus Fault `APP_sw140_backupCamUARTbusFault`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of APP_w140.