C1277 · blink 77 – Abnormal change in output voltage of right rear speed sensor

System: ABS with BA & EBD
Dashboard light: ABS warning
Check-engine blink code: 77
Applies to: All E120 with ABS (BA & EBD)
Description: Abnormal change in output voltage of right rear speed sensor
Possible causes: Right rear speed sensor rotor
What to check: Inspect listed trouble area (no detail page parsed; trouble-area assignment from chart row layout)
Confidence: high (official Toyota RM821E chart; trouble-area row alignment medium)

From the factory service material. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights