A/T Control System: Fail-Safe: VR30DDTT
TCM has the electrical fail-safe mode. The mode is divided into a maximum of 3 phases (1st fail-safe, 2nd fail-safe and final fail-safe) and functions so that the operation can be continued even if the signal circuit of the main electronically controlled input/output parts is damaged.
Even if the electronic circuit is normal, the fail-safe mode may start under special conditions (such as when the brake pedal is depressed suddenly from a hard wheel spin status to stop the rotation of wheels). In this case, turn the ignition switch OFF and back to ON after 5 seconds to resume the normal shift pattern.
Consequently, the customer's vehicle may already return to the normal condition. Refer to Diagnosis Flow .
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1st fail-safe |
The mode that the vehicle can stop safely, to prompt the driver to stop if the malfunction occurs and to shift to 2nd fail-safe early. It shifts to 2nd fail-safe or final fail-safe after the vehicle stopped. |
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2nd fail-safe |
The mode that the vehicle shifts to final fail-safe without changing the behavior, by identifying the malfunctioning parts in the condition that the driving force required for the driving is secured. |
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Final fail-safe |
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Fail-safe Function
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DTC |
Vehicle condition |
Vehicle behavior for 1st fail-safe |
Vehicle behavior for 2nd fail-safe |
Vehicle behavior for final fail-safe |
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P0615 |
-- |
Starter is disabled |
-- |
Starter is disabled |
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P0705 |
-- |
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-- |
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P0711 P0712 P0713 |
Between the gears of 1 - 2 - 3 |
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-- |
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Between the gears of 4 - 5 - 6 - 7 |
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-- |
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P0717 |
Between the gears of 1 - 2 - 3 |
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-- |
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Between the gears of 4 - 5 - 6 - 7 |
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-- |
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P0720 |
Between the gears of 1 - 2 - 3 |
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-- |
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Between the gears of 4 - 5 - 6 - 7 |
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-- |
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P0725 |
-- |
-- |
-- |
-- |
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P0729 P0731 P0732 P0733 P0734 P0735 P076F |
Small gear ratio difference |
Engine torque limit: Max 150 Nm |
-- |
Engine torque limit: Max 150 Nm |
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Great gear ratio difference |
Neutral malfunction between the gears of 1 - 2 - 3 and 7 |
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-- |
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Other than the above |
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P0730 |
-- |
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P0740 |
-- |
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-- |
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P0744 |
-- |
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-- |
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P0745 |
-- |
-- |
-- |
-- |
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P0750 P0775 P0795 P2713 P2722 P2731 P2807 |
-- |
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-- |
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P0780 |
-- |
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-- |
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P0826 |
Gate switch malfunction |
Only the gate switch is prohibited |
-- |
Only the gate switch is prohibited |
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Paddle switch malfunction |
Only the paddle switch is prohibited |
-- |
Only the paddle switch is prohibited |
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Malfunction of both switches |
Manual mode is prohibited |
-- |
Manual mode is prohibited |
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P893 |
-- |
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P1705 |
-- |
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P1721 |
-- |
-- |
-- |
-- |
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U0100 U0300 U1000 |
Between the gears of 1 - 2 - 3 |
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-- |
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Between the gears of 4 - 5 - 6 - 7 |
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-- |
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P0720 and P1721 |
-- |
Locks in 5GR |
-- |
Locks in 5GR |
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