P0657 – Actuator Supply Voltage Circuit / Open

System: ECM
Dashboard light: Check engine light (MIL)
Check-engine blink code: —
Applies to: Unverified for 1st-gen Passo/Boon; Listed for 1KR-FE but systems (dual VVT, electronic throttle/pedal sensors, EGR, dual injectors, stop-start, brake booster sensor) belong to later 1KR-FE/1KR-FKE variants; LIKELY NOT applicable to 1st-gen Passo - uncertain
Description: Actuator Supply Voltage Circuit / Open
Detection / symptoms: Not given in source
Possible causes: Not given in source
What to check: Not given in source
Confidence: low - NOT in Daihatsu M300 factory chart (B8-52..55); likely later-gen/Toyota-built 1KR only

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