P0704 on Toyota Passo (KGC10): Clutch Switch Input Circuit Malfunction
Short answer: P0704 means “Clutch Switch Input Circuit Malfunction”. The car’s computer has found a fault in the Clutch switch system and turns on the Check engine light (MIL). First check: not given in source; see Toyota/Daihatsu repair manual DTC section.
- Code
- P0704
- System
- Clutch switch
- Dashboard light
- Check engine light (MIL)
- Also sold as
- Daihatsu Boon, Daihatsu Sirion (M300)
- Applies to
- Unverified for 1st-gen Passo/Boon; 1KR-FE (toyota-club.net list covers all 1KR-FE variants; 1st-gen KGC10/15 fitment not individually confirmed)
- Confidence
- low - NOT in Daihatsu M300 factory chart (B8-52..55); likely later-gen/Toyota-built 1KR only
- Source
- toyota-club.net
Symptoms and when it is set
- Not given in source
Likely causes
- Not given in source (code list only)
What to check, in order
- Not given in source; see Toyota/Daihatsu repair manual DTC section
Related on this car
Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.

