Fail-Safe Chart

Description
The fail-safe function minimizes the loss of the ECT functions when a malfunction occurs in a sensor or solenoid.

Fail-safe

Fail-safe control list:

FAIL-SAFE CHART

Malfunctioning Part	Function
Speed sensor NT	Prohibits shifting to 2nd and 8th. Lock-up clutch control is prohibited. AI-SHIFT* control is prohibited.
Speed sensor NC3	Lock-up clutch control is prohibited. AI-SHIFT* control is prohibited.
Speed sensor SP2	Prohibits shifting to 2nd and 8th. Lock-up clutch control is prohibited. AI-SHIFT* control is prohibited.
Shift solenoid valve SL1, 2, 3, 4, 5 or SR	If the TCM detects a solenoid valve malfunction, it operates the failsafe control.
Transmission fluid temperature sensor	Shifting between 1st and 5th gear is allowed. Lock-up clutch control is prohibited. AI-SHIFT* control is prohibited.
Oil pressure switch	Performs same control when there is a shift solenoid valve SL1 ON malfunction.
TCM power supply (voltage is low)	When driving in 1st to 7th, fixes in 7th. When driving in 8th, fixes in 8th.
Knock sensor	When driving in 1st to 5th, up-shift to 6th or above is prohibited. When driving in 6th or above, from the time the malfunction is detected, up-shift to a higher gear is prohibited. Lock-up clutch control is prohibited.
CAN communication	Shifting to only either 1st or 3rd gear is allowed. Lock-up clutch control is prohibited.
HINT: *: In addition to the switching of the shift pattern through the pattern select switch, Artificial Intelligence Shift (AI-SHIFT) control enables the TCM to estimate the road conditions and the intention of the driver in order to automatically select the optimal shift pattern.

Shift Solenoid Valve Normal Operation Chart:

SHIFT SOLENOID VALVE NORMAL OPERATION CHART

Gear Position	1st	2nd	3rd	4th	5th	6th	7th	8th
Shift Solenoid Valve SL1	ON	ON	ON	ON	ON	OFF	OFF	OFF
Shift Solenoid Valve SL2	OFF	OFF	OFF	OFF	ON	ON	ON	ON
Shift Solenoid Valve SL3	OFF	OFF	ON	OFF	OFF	OFF	ON	OFF
Shift Solenoid Valve SL4	OFF	OFF	OFF	ON	OFF	ON	OFF	OFF
Shift Solenoid Valve SL5	OFF	ON	OFF	OFF	OFF	OFF	OFF	ON

Fail-safe Control Chart:

Fig 1: Fail-safe Control Chart

HINT:

*1: Canceled at first vehicle stop.
*2: Not canceled at next vehicle stop.
*3: Fail-safe operation is canceled when each trip is started.
*4: Not canceled, as vehicle stop was detected during previous trip.
*5: For the shift solenoid valve SL1 OFF malfunction, the 3rd trip is started with the failsafe on.
Fail-safe operation is performed when the TCM detects a malfunction.

GEAR POSITION UNDER NORMAL CONDITIONS CHART

Gear position under normal conditions		1st	2nd	3rd	4th	5th	6th	7th	8th
Shift Solenoid Valve SL1	ON malfunction (without fail-safe control)	1st	2nd	3rd	4th	5th	6th	7th	8th
	Fail-safe control during ON malfunction	1st	2nd	3rd	4th	5th	5th	5th	5th
	OFF malfunction (without fail-safe control)	N	N	N	N	N	6th	7th	8th
	Fail-safe control during OFF malfunction	6th	6th	6th	6th	6th	6th	7th	8th
	Fail-safe control during OFF malfunction (from 3rd trip)	Fixed in 3rd
Shift Solenoid Valve SL2	ON malfunction (without fail-safe control)	5th	8th	7th	6th	5th	6th	7th	8th
	Fail-safe control during ON malfunction	5th	5th	5th	5th	5th	6th	7th	8th
	OFF malfunction (without fail-safe control)	1st	2nd	3rd	4th	1st	N	N	N
	Fail-safe control during OFF malfunction (until vehicle stops)	Fixed in 7th
	Fail-safe control during OFF malfunction*1	1st	2nd	3rd	4th	4th	4th	4th	4th
Shift Solenoid Valve SL3	ON malfunction (without fail-safe control)	3rd	3rd	3rd	3rd	7th	7th	7th	7th
	Fail-safe control during ON malfunction (when malfunction is detected in 4th or below)	Fixed in 3rd
	Fail-safe control during ON malfunction (when malfunction is detected in 5th or above)	Fixed in 7th (If vehicle stops once, gear position is fixed in 3rd)
	OFF malfunction (without fail-safe control)	1st	2nd	1st	4th	5th	6th	N	8th
	Fail-safe control during OFF malfunction (When malfunction is detected in 7th, gear position is as shown in chart. If down-shifted to 6th or below once, upshift to 7th or above is prohibited.)	1st	2nd	4th	4th	5th	6th	8th	8th
	Fail-safe control during OFF malfunction (when malfunction is detected in 6th or below)	1st	2nd	4th	4th	5th	6th	6th	6th
Shift Solenoid Valve SL4	ON malfunction (without fail-safe control)	4th	4th	3rd	4th	6th	6th	7th	6th
	Fail-safe control during ON malfunction (when malfunction is detected in 4th or below)	Fixed in 3rd
	Fail-safe control during ON malfunction (when malfunction is detected in 5th or above)	Fixed in 7th (If vehicle stops once, gear position is fixed in 3rd)
	OFF malfunction (without fail-safe control)	1st	2nd	3rd	1st	5th	N	7th	8th
	Fail-safe control during OFF malfunction (When malfunction is detected in 6th, gear position as shown in chart. If down-shifted to 5th or below once, upshift to 4th, 6th, 7th, and 8th is prohibited.)	1st	2nd	3rd	5th	5th	7th	7th	7th
	Fail-safe control during OFF malfunction (when malfunction is detected in 4th)	1st	2nd	3rd	5th	5th	5th	5th	5th
Shift Solenoid Valve SL5	ON malfunction (without fail-safe control)	2nd	2nd	3rd	4th	8th	6th	7th	8th
	Fail-safe control during ON malfunction (when malfunction is detected in 4th or below)	Fixed in 3rd
	Fail-safe control during ON malfunction (when malfunction is detected in 5th or above)	Fixed in 7th (If vehicle stops once, gear position is fixed in 3rd)
	OFF malfunction (without fail-safe control)	1st	1st	3rd	4th	5th	6th	7th	N
	Fail-safe control during OFF malfunction	1st	3rd	3rd	4th	5th	6th	7th	7th
Shift Solenoid Valve SR	OFF malfunction (when malfunction occurs in 5th or below)	1st	2nd	3rd	4th	1st	7th	7th	7th
	OFF malfunction (when malfunction occurs in 6th or above, or after vehicle shifts to 7th)	7th	7th	7th	7th	7th	7th	7th	7th
	Fail-safe control during OFF malfunction (when malfunction is detected in 5th or above)	Fixed in 7th
	OFF malfunction (trip is started in malfunctioning state)	3rd	3rd	3rd	3rd	7th	7th	7th	7th
	Fail-safe control during OFF malfunction (when malfunction is detected in 4th or below)	Fixed in 3rd
	Fail-safe control during OFF malfunction (when malfunction is detected in 5th or above*2)	Fixed in 7th (If vehicle stops once, gear position is fixed in 3rd)
HINT: 1: When vehicle is driven after fail-safe detection. 2: After trip is started in malfunctioning state. In case of an open or short circuit, the TCM stops sending current to the open or short-circuited solenoid.