If any of the following DTCs are set, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily or stops fuel injection.
|DTC||Component||Fail-safe Operation||Fail-safe Deactivation Condition|
|Air fuel ratio sensor heater||ECM turns off air fuel ratio sensor heater||Power switch off|
|Heated oxygen sensor heater||ECM turns off heated oxygen sensor heater||Power switch off|
|Mass air flow meter sub-assembly||ECM calculates ignition timing according to engine speed and throttle valve position||Pass condition detected|
|Manifold absolute pressure sensor||ECM turns off EGR valve operate||Pass condition detected|
|Intake air temperature sensor||ECM estimates intake air temperature to be 20°C (68°F)||Pass condition detected|
|Engine coolant temperature sensor||ECM estimates engine coolant temperature to be 80°C (176°F)||Pass condition detected|
|Electronic throttle control system||ECM cuts off throttle actuator current and throttle valve returns to the 5.5° throttle position by return spring
The ECM stops the engine and the vehicle can be driven using solely the hybrid system
|Pass condition detected and then power switch turned off|
|Knock control sensor||ECM sets ignition timing to maximum retard||Power switch off|
|P0351 to P0354||Ignition coil assembly
|ECM cuts fuel||Pass condition detected|
|EGR valve assembly||ECM assumes that EGR valve is closed, so that ignition timing controlled to a safe value||Pass condition detected|
|P216B||Engine water pump assembly||Output duty ratio of the WPO terminal repeats a cycle of 0% for 30 seconds and then 85% for 5 seconds*2||Power switch off|
|P261C||Engine water pump assembly||Output duty ratio of the WPO terminal remains at 0%*2||Power switch off|
|P261D||Engine water pump assembly||Output duty ratio of the WPO terminal remains at 0%*2||Power switch off|
- *1: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly.
- *2: When the coolant temperature reaches 105°C (221°F), the engine is stopped and the hybrid system is solely used to driving vehicle.