Lexus ES: Fail-safe Chart
FAIL-SAFE CHART
Description
The fail-safe function minimizes the loss of operation when a malfunction occurs in a sensor or solenoid.
Fail-safe
(a) Fail-safe control list:
| Malfunctioning Part | Function |
|---|---|
| Transmission Revolution Sensor (NT) |
|
| Transmission Revolution Sensor (NC) |
|
| Solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SLT, SLU and SL) valve | If the ECM detects a solenoid valve malfunction, it performs fail-safe control. |
| ATF temperature sensor |
|
| ECM power supply (voltage is low) |
|
| Knock sensor |
|
| CAN communication |
|
| Solenoid (SLU) valve |
|
| Solenoid (SLT) valve |
|
(b) Solenoid Valve Normal Operation Chart:
| Gear | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
|---|---|---|---|---|---|---|---|---|
| Solenoid (SL1) Valve | ON | ON | ON | ON | ON | OFF | OFF | OFF |
| Solenoid (SL2) Valve | OFF | OFF | OFF | OFF | ON | ON | ON | ON |
| Solenoid (SL3) Valve | OFF | OFF | ON | OFF | OFF | OFF | ON | OFF |
| Solenoid (SL4) Valve | OFF | OFF | OFF | ON | OFF | ON | OFF | OFF |
| Solenoid (SL5) Valve | OFF | ON | OFF | OFF | OFF | OFF | OFF | ON |
| Solenoid (SL6) Valve | ON | OFF | OFF | OFF | OFF | OFF | OFF | OFF |
(c) Fail-safe Control Chart:
*1: Operation of fail-safe is canceled the first time the vehicle is stopped.
*2: Operation of fail-safe is not canceled for subsequent times the vehicle is stopped.
Fail-safe operation is performed when the ECM detects a malfunction.
Fail-safe Control Chart (Solenoid (SL1) Valve)| Gear Under Normal Conditions | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
|---|---|---|---|---|---|---|---|---|
| *: Neutral | ||||||||
| ON malfunction (without fail-safe control) | 1st | 2nd | 3rd | 4th | 5th | 4th to 5th | 3rd to 5th | 5th |
| 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 |
| Gear Under Normal Conditions | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
|---|---|---|---|---|---|---|---|---|
| *: Neutral | ||||||||
| ON malfunction (without fail-safe control) | 5th | 5th | 3rd to 5th | 4th to 5th | 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 | N* | N* | N* | N* |
| Fail-safe control during OFF malfunction | 1st | 2nd | 3rd | 4th | 4th | 4th | 4th | 4th |
| Gear Under Normal Conditions | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
|---|---|---|---|---|---|---|---|---|
| *: Neutral | ||||||||
| ON malfunction (without fail-safe control) | 3rd | 3rd | 3rd | 3rd | 3rd to 5th | 7th | 7th | 7th |
| Fail-safe control during ON malfunction | 3rd | 3rd | 3rd | 3rd | 3rd | 7th | 7th | 7th |
| OFF malfunction (without fail-safe control) | 1st | 2nd | N* | 4th | 5th | 6th | N* | 8th |
| Fail-safe control during OFF malfunction | 1st | 2nd | 4th | 4th | 5th | 6th | 6th | 8th |
| Gear Under Normal Conditions | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
|---|---|---|---|---|---|---|---|---|
| *: Neutral | ||||||||
| ON malfunction (without fail-safe control) | 4th | 4th | 3rd | 4th | 4th to 5th | 6th | 7th | 6th |
| Fail-safe control during ON malfunction | 4th | 4th | 4th | 4th | 4th | 6th | 6th | 6th |
| OFF malfunction (without fail-safe control) | 1st | 2nd | 3rd | N* | 5th | N* | 7th | 8th |
| Fail-safe control during OFF malfunction | 1st | 2nd | 3rd | 5th | 5th | 7th | 7th | 8th |
| Gear Under Normal Conditions | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
|---|---|---|---|---|---|---|---|---|
| *: Neutral | ||||||||
| ON malfunction (without fail-safe control) | N* | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
| Fail-safe control during ON malfunction | 2nd | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
| OFF malfunction (without fail-safe control) | 1st | N* | 3rd | 4th | 5th | 6th | 7th | N* |
| Fail-safe control during OFF malfunction | 3rd | 3rd | 3rd | 4th | 5th | 6th | 7th | 7th |
| Gear Under Normal Conditions | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
|---|---|---|---|---|---|---|---|---|
| *: Neutral | ||||||||
| ON malfunction (without fail-safe control) | 1st | N* | 3rd | 4th | 5th | 6th | 7th | N* |
| Fail-safe control during ON malfunction | 3rd | 3rd | 3rd | 4th | 5th | 6th | 7th | 7th |
| OFF malfunction (without fail-safe control) | N* | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
| Fail-safe control during OFF malfunction | 2nd | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
| Gear Under Normal Conditions | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
|---|---|---|---|---|---|---|---|---|
| OFF malfunction (without fail-safe control) (MAX Pressure) | 1st | 5th | 3rd to 5th | 4th to 5th | 5th | 4th to 5th | 3rd to 5th | 5th |
| Fail-safe control during ON malfunction | Fixed in 5th | |||||||
| Gear Under Normal Conditions | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
|---|---|---|---|---|---|---|---|---|
| *: Neutral | ||||||||
| ON malfunction (without fail-safe control) | 1st | 2nd | 3rd or N* | 4th or N* | 5th | 6th or N* | 7th or N* | 8th |
| Fail-safe control during ON malfunction | 1st | 2nd | 5th | 5th | 5th | 5th | 5th | 8th |
| Gear Under Normal Conditions | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
|---|---|---|---|---|---|---|---|---|
| *: Neutral | ||||||||
| ON malfunction (without fail-safe control) (MIN Pressure) | 1st | 2nd | 3rd or N* | 4th or N* | 5th | 6th or N* | 7th or N* | 8th |
| Fail-safe control during ON malfunction | 1st | 2nd | 5th | 5th | 5th | 5th | 5th | 8th |
HINT:
In the case of an open or short, the ECM stops sending current to the open or shorted solenoid.
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