Engine Control System: FAILSAFE

Description

When a DTC is detected, ECM executes a mode (in the Fail-safe mode) applicable to the DTC. The fail-safe mode has the preset traveling control mode (accelerator angle variation and engine output limit) and device fix mode.

Fail safe mode		Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. NOTE: ECM does not control the accelerator pedal releasing speed.
Traveling control mode	Engine output control	ECM reduces the engine output, according to the rise in engine speed. This reduces the vehicle speed to encourage the driver to repair malfunction. Engine output control 1: Limits the maximum speed to 120 km/h (75 MPH) * Engine output control 2: Limits the maximum speed to 55 km/h (34 MPH) * * : This value is a reference value converted from engine power to vehicle speed. Actual power limitation value differs due to the malfunctioning part and driving condition.
Device fix mode		This mode fixes the IVT control solenoid valve and the EVT control solenoid valve in the reference position. A control signals is not transmitted to EGR volume control valve and the EGR volume control is deactivated. The Intake manifold runner control valve motor is turned OFF (Intake manifold runner control valve opens).
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).
	Idle speed control	Stops feedback control of idle speed and controls with specified speed.
	Recovery speed control at decelerating	Stops recovery speed control by the fuel cut at decelerating and controls with specified speed.
	Idle neutral control	Stops idle neutral control.
	Ignition timing correction control	Partially controls ignition timing control.
	Retardation control	Controls ignition timing delay control in the intermediate water temperature range.

Fail Safe Pattern

Pattern	Fail safe mode
A	Traveling control mode	Accelerator angle variation control
B		Engine output control 1
C		Engine output control 2
D	Device fix mode
E	Combustion control mode	Stratified charge combustion control at starting
F		Idle speed control Recovery speed control at decelerating Idle neutral control
G		Ignition timing correction control Retardation control

Fail Safe List

*: Applicable - : Not applicable

DTC No.	Detected items	Vehicle behavior
		Pattern							Others
		A	B	C	D	E	F	G	Others
P0011 P0075 P052A P052B	Intake valve timing control	-	-	-	*	-	-	-	-
P0014 P0078	Exhaust valve timing control	-	-	-	*	-	-	-	-
P0046	Electric wastegate control actuator	*	*	-	*	-	-	-	The ECM stops the electric wastegate actuator control, engine can not be supercharged driving. The ECM regulates engine power limiter and EGR Off.
P0087 P0090	FRP control system	*	-	*	*	*	-	-	-
P0088	FRP control system	*	-	*	-	*	-	-	-
P00B3 P00B4	Engine coolant temperature sensor 2	-	-	-	-	-	-	-	High coolant temperature control does not function.
P0101 P0102 P0103	Mass air flow sensor	*	*	-	*	*	*	*	NOTE: Fail-safe mode may not start depending on malfunction type of ECM
P0117 P0118	Engine coolant temperature sensor 1	-	-	-	-	*	*	-	The engine speed does not exceed 2, 000 RPM due to fuel cut
P0122 P0123 P0222 P0223 P2135	Throttle position sensor	-	-	-	*	-	-	-	The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 degrees. The ECM regulates the opening speed of the throttle valve to be slower than the normal condition. So, the acceleration will be poor.
P0171 P0172	Fuel injection system	*	-	-	-	*	*	-	-
P0190	FRP sensor	*	*	*	*	*	*	-	High pressure fuel pump is activated at maximum discharge pressure. NOTE: Fail-safe mode may not start depending on malfunction type of ECM
P0192	FRP sensor	*	*	-	-	*	-	-	High pressure fuel pump is activated at maximum discharge pressure. NOTE: Fail-safe mode may not start depending on malfunction type of ECM
P0193	FRP sensor	*	*	-	-	*	-	-	High pressure fuel pump is activated at maximum discharge pressure. NOTE: Fail-safe mode may not start depending on malfunction type of ECM
P0196 P0197 P0198	Engine oil temperature sensor	-	-	-	-	-	-	-	Exhaust valve timing control does not function.
P0201 P0202 P0203 P0204	Injector	*	-	*	-	*	-	-	-
P0237	Turbocharger boost sensor	*	*	-	*	-	-	-	-
P0300 P0301 P0302 P0303 P0304	Misfire	*	-	-	-	*	*	-	-
P0335	Crankshaft position sensor	-	-	-	*	-	-	-	-
P0340	Camshaft position sensor	-	-	-	*	-	-	-	-
P0365	Exhaust valve timing control position sensor	-	-	-	*	-	-	-	-
P0401 P0402	EGR system	-	-	-	*	-	-	-	-
P0404	EGR volume control valve	*	-	*	*	*	*	-	-
P0407 P0408 P046E P046F P0486	EGR pressure sensor	-	-	-	*	-	-	-	-
P040B P040C P040D	EGR temperature sensor	-	-	-	*	-	-	-	-
P0448	EVAP canister vent control valve	*	-	-	*	-	-	-	-
P044A P044B P044C P044D P044E	EGR volume control valve position sensor	*	-	-	*	-	-	-	-
P0500	Vehicle speed sensor	*	-	-	-	*	*	-	-
P0501 P2159	Vehicle speed sensor	*	-	-	-	*	-	-	-
P050A	Cold start control	*	-	-	-	*	-	-	-
P0524	Engine oil pressure	-	-	-	-	-	-	-	ECM illuminates oil pressure warning lamp on the combination meter. Engine speed will not rise more than 4, 000 RPM due to the fuel cut. Fail-safe is canceled when ignition switch OFF → ON.
P0603 P0607	ECM	*	*	-	-	-	-	-	-
P0604 P0605 P0606 P060B		-	-	-	*	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P060A		*	*	-	*	-	-	-	NOTE: Fail-safe mode may not start depending on malfunction type of ECM
P062B		*	-	*	-	*	-	-
P0643	Sensor power supply	-	-	-	*	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P119A	FRP sensor	*	-	-	-	*	-	-	-
P119B	FRP sensor	*	-	-	-	*	-	-	-
P119C	FRP sensor	*	-	-	-	*	-	-	-
P1197	Out of gas	-	-	*	*	-	-	-	-
P1217	Engine over temperature	-	-	-	-	-	-	-	The engine speed does not exceed 2, 000 RPM due to fuel cut
P159B	G sensor	*	-	-	-	*	-	-	-
P2100 P2103	Throttle control motor relay	-	-	-	*	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P2004	Intake manifold runner control valve	-	-	-	*	-	-	-	-
P2014	Intake manifold runner control valve position sensor	-	-	-	*	-	-	-	-
P2016	Intake manifold runner control valve position sensor	-	-	-	*	-	-	-	-
P2017	Intake manifold runner control valve position sensor	-	-	-	*	-	-	-	-
P2018	Intake manifold runner control valve position sensor	-	-	-	*	-	-	-	-
P2101	Electric throttle control function	-	-	-	*	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P2118	Throttle control motor	-	-	-	*	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P2119	Electric throttle control actuator	*	*	-	*	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. NOTE: Fail-safe mode may not start depending on malfunction type of ECM
P2122 P2123 P2127 P2128 P2138	Accelerator pedal position sensor	-	-	-	*	-	-	-	The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 degrees. The ECM regulates the opening speed of the throttle valve to be slower than the normal condition. So, the acceleration will be poor.
P2162	Vehicle speed sensor	*	-	-	-	*	-	-	-
P2263	Turbocharger system	*	*	-	*	-	-	-	-
P2413	EGR system	-	-	-	*	-	-	-	-
P2457	EGR cooling system	-	-	-	*	-	-	-	-
P2562 P2566	Electric wastegate control valve position sensor	*	*	-	*	-	-	-	The ECM stops the electric wastegate actuator control, engine can not be supercharged driving. The ECM regulates engine power limiter and EGR Off.
P2563	Electric wastegate control valve position sensor	*	*	-	*	-	-	-	-
P2564	Electric wastegate control valve position sensor	*	*	-	*	-	-	-	-
P2565	Electric wastegate control valve position sensor	*	*	-	*	-	-	-	-
P26A3 P26A5 P26A6 P26A7	Multi-way control valve	-	-	-	-	-	-	-	When detecting a malfunction with the valve closed, ECM fully opens the valve. When detecting a malfunction with the valve opened, ECM maintains valve angle. When detecting a malfunction in sensor, ECM fully opens the valve. ECM limits the engine output depending on malfunctions.