Engine Control System: Fail-safe

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.
	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: Driving at 70 km/h or more is possible. Engine output control 2: Driving at 40 km/h or more is possible. NOTE: 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		Fixes electric intake valve timing control motor in the reference position. Fixes exhaust valve timing control solenoid valve in the reference position.
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.
	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 

*: Not applicable

Fail Safe List 

x: Applicable, -: Not applicable

DTC No.	Detected items	Vehicle behavior
		Pattern							Others
		A	B	C	D	E	F	G
U0101	CAN communication line	-	-	-	x	-	-	-	ECM operates active grille shutter to fully-open position. *
U0122	CAN communication line	x	-	x	-	-	-	-	-
U012E, U042F	Engine communication	-	-	-	x	x	-	-	ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.)
		-	-	-	x	-	x	-
P0010, P0020	Electric intake valve timing control module	-	-	-	x	x	-	-	ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.)
		-	-	-	x	-	x	-
P0011, P0012, P0016, P0018, P0021	Intake valve timing control	-	-	-	x	-	-	-	ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.) NOTE: When VTC mechanism sticks, camshaft position does not change from position of stuck angle.
P0014, P0015, P0017, P0019, P0024, P0025	Exhaust valve timing control	-	-	-	x	-	-	-	ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.) NOTE: When VTC mechanism sticks, camshaft position does not change from position of stuck angle.
P0046, P004B	Electric wastegate actuator motor	-	x	-	x	-	-	-	ECM stops the electric wastegate actuator control. (Wastegate valve opens)
P0078, P0084	Exhaust valve timing control solenoid valve	-	-	-	x	-	-	-	-
P0087, P0088	Fuel rail pressure control	x	-	-	x	x	-	-	-
		x	-	-	-	x	-	-
P0090	High pressure fuel pump	x	-	-	x	x	-	-	-
P0101, P010B	Mass air flow sensor	x	-	-	-	x	-	-	-
		-	x	-	x	-	-	x	-
P0102, P0103, P010C, P010D		-	x	-	x	-	-	x	-
P0117, P0118	Engine coolant temperature sensor	-	-	-	-	-	x	-	-
P0122, P0123, P0222, P0223, P0227, P0228, P1239, P2132, P2133, P2135	Throttle position sensor	-	-	-	x	-	-	-	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, P0174, P0175	Fuel injection system	x	-	-	-	-	x	-	-
P0190	Fuel rail pressure sensor	x	-	-	x	-	x	-	-
P0191, P0192, P0193		x	-	-	-	x	-	-	-
P0197, P0198	Engine oil temperature sensor	-	-	-	-	-	-	-	Exhaust valve timing control does not function.
P0201, P0202, P0203, P0204, P0205, P0206	Fuel injector	x	-	-	-	x	-	-	-
P0234, P1334	Turbocharger system	-	x	-	x	-	-	-	-
P0235, P0237, P0238, P0241, P0242	Turbocharger boost sensor	-	x	-	x	-	-	-	-
P0300, P0301, P0302, P0303, P0304, P0305, P0306	Misfire	x	-	-	-	-	x	-	-
P0335	Crankshaft position sensor	-	-	-	x	x	-	-	-
		-	-	-	x	-	x	-
P0340, P0345	Intake camshaft position sensor	-	-	-	x	x	-	-	-
		-	-	-	x	-	x	-
P1140, P1145		x	-	-	x	-	-	x	-
P0365, P0390	Exhaust camshaft position sensor	-	-	-	x	-	-	-	-
P0500	Vehicle speed sensor	x	-	-	-	-	x	-	-
P052A, P052B, P052C, P052D	Intake valve timing control	-	-	-	x	-	-	-	-
P0524	Engine oil pressure	-	-	-	-	-	-	-	ECM illuminates engine oil pressure warning lamp on the combination meter. Engine speed will not rise more than 4000 RPM due to the fuel cut. Fail-safe is canceled when ignition switch OFF → ON.
P0603, P0607	ECM	-	-	-	-	-	-	-	-
		-	x	-	-	-	-	-	ASCD operation may be deactivated.
P0604		-	-	-	x	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P0605		-	-	-	-	-	-	-	-
		-	-	-	x	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P0606		-	-	-	-	-	-	-	-
		-	-	-	x	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P060A		-	-	-	x	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
		-	x	-	x	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. ASCD operation may be deactivated.
P060B		-	-	-	x	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P062B		-	-	-	-	-	-	-	-
		x	-	-	-	x	-	-
P062D, P062E		-	-	x	x	x	-	-	-
P0641	Sensor power supply	-	-	-	x	x	-	-	ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.)
		-	-	-	x	-	x	-
P0643		-	-	-	x	-	-	-	-
P14A4, P14A5, P14AD, P14AE	Charge air cooler cooling electric water pump	-	-	-	-	-	-	-	Charge air cooler cooling electric water pump runs at the command speed.
P14A7, P14B0		-	-	-	-	-	-	-	Charge air cooler cooling electric water pump runs at full speed.
P14A9, P14AA, P14AC, P14B2, P14B3, P14B5		-	-	-	-	-	-	-	Charge air cooler cooling electric water pump stops.
P1197	Out of gas	-	-	-	x	-	-	-	-
P119A, P119B, P119C	Fuel pressure sensor	x	-	-	-	x	-	-	-
P1233, P2101	Electric throttle control	-	-	-	x	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P1236, P2118	Throttle control motor	-	-	-	x	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P1238, P2119	Electric throttle control actuator	-	x	-	-	-	-	-	-
		-	-	-	x	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P1290, P2100, P2103	Throttle control motor relay	-	-	-	x	-	-	-	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P1805	Brake switch	-	-	-	-	-	-	-	ECM controls the electric throttle control actuator by regulating the throttle opening to a small range. Therefore, acceleration will be poor.
									Vehicle condition	Driving condition
									When engine is idling	Normal
									When accelerating	Poor acceleration
P2122, P2123, P2127, P2128, P2138	Accelerator pedal position sensor	-	-	-	x	-	-	-	-
P23E9, P23EA, P2614, P2615	Intake camshaft position sensor	-	-	-	x	x	-	-	ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.)
		-	-	-	x	-	x	-
P23EB, P2616, P2617, P2618		-	-	-	x	x	-	-
P2619		-	-	-	x	-	x	-
P2562, P2566, P2586, P2590	Electric wastegate control valve position sensor	-	x	-	x	-	-	-	ECM stops the electric wastegate actuator control. (Wastegate valve opens)
P2563, P2564, P2565, P2587, P2588, P2589									-
P2578, P2593	Turbocharger speed sensor	-	-	-	-	-	-	-	Torque have to be limited to the operating range that does not generate the over speed of the turbocharger.
P25DF, P25E8, P34A4, P34AC, P34AD, P34B0, P34B1	Electric intake valve timing control actuator	-	-	-	x	x	-	-	ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.) NOTE: Normal bank transitions intermediate F/S valve timing.
P34C4, P34C5	Electric intake valve timing control actuator	-	-	-	x	x	-	-	ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.)
P34C8	Electric intake valve timing control module	-	-	-	x	x	-	-	ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.)
		-	-	-	x	-	x	-