Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Toyota >> 2012 >> Prius V >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control System (Diagnostics - Introduction) >> Cruise Control System >> Fail-Safe Chart >> Fail-Safe Chart

Fail-Safe Chart

HINT: 

If the following conditions are detected while the cruise control system is controlling vehicle speed, the system clears the vehicle speed stored in the power management control ECU and cancels cruise control system control of vehicle speed.

Vehicle Condition Auto Cancel Condition Re-operation Condition
Cruise control indicator illuminates in amber
  • Open or short in stop light switch circuit
  • Problem with vehicle speed signal
  • Malfunction in the hybrid control system
 Cruise control system is turned off and back on again using the cruise control switch (ON-OFF button).
  • Problem with stop light switch input circuit
  • Problem with cruise control switch cancel circuit
  • Electronically controlled brake system operates while driving with cruise control system controlling vehicle speed
  • Communication stop between skid control ECU and power management control ECU
 Power switch is turned off and back to ON again.
Cruise control indicator remains illuminated in green (Cruise control system control of vehicle speed is canceled)
  • Vehicle speed is lower than low speed limit (approximately 40 km/h (25 mph)) while driving with cruise control system controlling vehicle speed
 Cruise control switch is pushed to +/RES
Vehicle speed is lower than stored speed by approximately 16 km/h (10 mph) or more Cruise control switch is pushed to -/SET
scientia non olet · About Mike's Workshop Manuals