AUTOMATIC TRANSMISSION SYSTEM FAIL-SAFE CHART
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Description
This function minimizes the loss of the ECT functions when a malfunction occurs in each sensor or solenoid.
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Fail-safe
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Fail-safe control list:
Malfunctioning Part Function Transmission revolution sensor (NT)
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Prohibits shifting to 2nd and 8th.
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Lock up clutch control is prohibited.
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AI-SHIFT* control is prohibited.
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High response gear shifts are prohibited.
Transmission revolution sensor (SP2)
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Prohibits shifting to 2nd and 8th gear.
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Lock up clutch control is prohibited.
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AI-SHIFT* control is prohibited.
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High response gear shifts are prohibited.
Shift solenoid valve SL1, SL2, SL3, SL4, SL5, SC1 and SC2 If the TCM detects a solenoid valve malfunction, it performs fail-safe control. No. 1 ATF temperature sensor
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Shifting between 1st and 5th gear is allowed.
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Lock up clutch control is prohibited.
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AI-SHIFT* control is prohibited.
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High response gear shifts are prohibited.
TCM power supply (voltage is low)
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When driving in 1st to 7th gear, the transmission will be fixed in 7th gear.
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When driving in 8th gear, the transmission will be fixed in 8th gear.
Knock sensor
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When driving in 1st to 5th gear, up-shift to 6th or higher is prohibited.
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When driving in 6th gear or higher, from the time the malfunction is detected, up-shift to higher gear is prohibited.
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Lock up clutch control is prohibited.
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High response gear shifts are prohibited.
CAN communication
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Shifting to only either 1st or 3rd gear is allowed.
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Lock up clutch control is prohibited.
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High response gear shifts are prohibited.
Shift solenoid valve SLU Lock up clutch control is prohibited. Shift solenoid valve SLT
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Engine output is limited.
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High response gear shifts are prohibited.
Tech Tips
*: 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 driver intention in order to automatically select the optimal shift pattern.
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Shift Solenoid Valve Normal Operation Chart:
Gear 1st 2nd 3rd 4th 5th 6th 7th 8th Shift Solenoid Valve SL1 ON ON ON ON ON OFF OFF OFF Shift Solenoid Valve SL2 ON
(OFF)*
ON ON ON OFF OFF OFF OFF Shift Solenoid Valve SL3 ON ON OFF ON ON ON OFF ON Shift Solenoid Valve SL4 OFF OFF OFF ON OFF ON OFF OFF Shift Solenoid Valve SL5 OFF ON OFF OFF OFF OFF OFF ON Shift Solenoid Valve SC1 ON
(OFF)*
ON ON ON ON ON ON ON Shift Solenoid Valve SC2 OFF
(ON)*
OFF OFF OFF OFF OFF OFF OFF
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*: Shift lever in S with the S1 (1st gear) range selected
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Fail-safe Control Chart:
Tech Tips
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*1: Operation of fail-safe is canceled the first time the vehicle stops.
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*2: Operation of fail-safe is not canceled for subsequent vehicle stops.
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*3: Operation of fail-safe is canceled when a new trip is started.
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*4: Operation of fail-safe is not canceled, as a vehicle stop was detected on the previous trip.
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*5: For the shift solenoid valve SL1 OFF malfunction, the 3rd trip is started with the fail-safe ON.
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Fail-safe operation is performed when the TCM detects a malfunction.
Gear 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 3rd 3rd 3rd 3rd 3rd 3rd 3rd 3rd OFF malfunction
(without fail-safe control)
N N N N N 6th 7th 8th Fail-safe control during OFF malfunction 3rd 3rd 3rd 3rd 3rd 3rd 3rd 3rd Shift Solenoid Valve SL2 ON malfunction
(without fail-safe control)
1st 2nd 3rd 4th 1st N N N Fail-safe control during ON malfunction 3rd 3rd 3rd 3rd 3rd 3rd 3rd 3rd OFF malfunction
(without fail-safe control)
5th 8th 7th 6th 5th 6th 7th 8th Fail-safe control during OFF malfunction 5th 5th 5th 5th 5th 5th 5th 5th Shift Solenoid Valve SL3 ON malfunction
(without fail-safe control)
1st 2nd 1st 4th 5th 6th N 8th Fail-safe control during ON malfunction 4th 4th 4th 4th 4th 4th 4th 4th OFF malfunction
(without fail-safe control)
3rd 3rd 3rd 3rd 7th 7th 7th 7th Fail-safe control during OFF malfunction 3rd 3rd 3rd 3rd 3rd 3rd 3rd 3rd Shift Solenoid Valve SL4 ON malfunction
(without fail-safe control)
4th 4th 3rd 4th 6th 6th 7th 6th Fail-safe control during ON malfunction 4th 4th 4th 4th 4th 4th 4th 4th OFF malfunction
(without fail-safe control)
1st 2nd 3rd 1st 5th N 7th 6th Fail-safe control during OFF malfunction 3rd 3rd 3rd 3rd 3rd 3rd 3rd 3rd Shift Solenoid Valve SL5 ON malfunction
(without fail-safe control)
2nd 2nd 3rd 4th 8th 6th 7th 8th Fail-safe control during ON malfunction 3rd 3rd 3rd 3rd 3rd 3rd 3rd 3rd OFF malfunction
(without fail-safe control)
1st 1st 3rd 4th 5th 6th 7th N Fail-safe control during OFF malfunction 3rd 3rd 3rd 3rd 3rd 3rd 3rd 3rd Shift Solenoid Valve SC1 ON malfunction
(without fail-safe control)
1st 2nd 3rd 4th 5th 4th 3rd 2nd Fail-safe control during ON malfunction 3rd 3rd 3rd 3rd 3rd 3rd 3rd 3rd OFF malfunction
(without fail-safe control)
1st 2nd 3rd 4th 5th 6th 7th 8th Fail-safe control during OFF malfunction 2nd 2nd 2nd 2nd 2nd 2nd 2nd 2nd Shift Solenoid Valve SC2 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 6th 7th 8th OFF malfunction
(without fail-safe control)
1st 2nd 3rd 4th 5th 6th 7th 8th Fail-safe control during OFF malfunction 2nd 2nd 2nd 2nd 2nd 2nd 2nd 2nd Shift Solenoid Valve SLT 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 6th 7th 8th OFF malfunction
(without fail-safe control)
(Clutch slipping in any gear due to lowest possible line pressure)
1st 2nd 3rd 4th 5th 6th 7th 8th Fail-safe control during OFF malfunction
(during engine torque reduction)
1st 2nd 3rd 4th 5th 6th 7th 8th -
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