Torque Sensor Circuit Malfunction (C1511-C1514,C1517)
The torque sensor converts the rotation torque input to the steering wheel into an electrical signal and sends it to the power steering ECU. Based on this signal, the ECU detects steering effort.
DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
C1511 |
Torque sensor (TRQ1) signal error or stop |
|
C1512 |
Torque sensor (TRQ2) signal error or stop |
|
C1513 |
Deviation between torque sensors TRQ1 and TRQ2 exceeds specified value |
|
C1514 |
Torque sensor power source voltage error |
|
C1517 |
Temporary control due to malfunction related to torque sensor continues for long time |
CAUTION / NOTICE / HINT
NOTICE:
If the power steering ECU and steering column assembly have been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration (See page .gif)
).
PROCEDURE
CHECK CONNECTOR CONNECTION CONDITION (TORQUE SENSOR - ECU)
(a) Check the installation condition of the torque sensor connector.
OK:
Torque sensor connector is securely connected to the power steering ECU.
| NG | .gif) | CONNECT CONNECTOR |
|
.gif)
CHECK POWER STEERING ECU (TRQV VOLTAGE)
(a) Turn the ignition switch to ON.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
z10-6 (TRQV) - z10-8 (TRQG) |
Ignition switch ON |
4.5 to 5.5 V |
*1 |
Component with harness connected (Power Steering ECU) |
| NG | | REPLACE POWER STEERING ECU |
|
CHECK POWER STEERING ECU (TRQ1, TRQ2 VOLTAGE)
(a) Start the engine. |
 |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
|---|---|---|
z10-5 (TRQ1) - z10-8 (TRQG) |
The engine running, steering wheel not turned (without load). |
2.3 to 2.7 V |
The engine running, steering wheel turned to right with vehicle stopped. |
2.5 to 3.8 V |
|
The engine running, steering wheel turned to left with vehicle stopped. |
1.2 to 2.5 V |
|
z10-7 (TRQ2) - z10-8 (TRQG) |
The engine running, steering wheel not turned (without load). |
2.3 to 2.7 V |
The engine running, steering wheel turned to right with vehicle stopped. |
1.2 to 2.5 V |
|
The engine running, steering wheel turned to left with vehicle stopped. |
2.5 to 3.8 V |
(c) Under each condition, measure the voltage at terminals TRQ1 and TRQ2, and calculate the sum.
Standard Voltage:
Inspection Item | Condition | Specified Condition |
|---|---|---|
Sum of voltage between z10-5 (TRQ1) and z10-8 (TRQG) and voltage between z10-7 (TRQ2) and z10-8 (TRQG) |
The engine running, steering wheel not turned (without load). |
Between 4.75 V and 5.25 V |
The engine running, steering wheel turned to right with vehicle stopped. |
||
The engine running, steering wheel turned to left with vehicle stopped. |
*1 |
Component with harness connected (Power Steering ECU) |
| OK | | REPLACE POWER STEERING ECU |
| NG | | REPLACE STEERING COLUMN ASSEMBLY |
Test yourself
A quick Toyota Venza quiz: every answer comes with an explanation and a link to the manual page.