Power Steering System

POWER STEERING: POWER STEERING SYSTEM: C1511/11-C1514/14,C1517/17: Torque Sensor 1 Malfunction
C1517/17 - Torque Sensor Hold Malfunction

DESCRIPTION

The torque sensor converts the rotation torque input from the steering wheel into electric signals and sends them to the power steering ECU.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect a Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / EMPS / Data List.

(e) Select the items "Torque Sensor 1 Output" and "Torque Sensor 2 Output" in the Data List and read the value displayed on the Techstream.

EMPS::

(a) Check the difference in the values between "Torque Sensor 1 Output" and "Torque Sensor 2 Output".

OK:

The voltage difference is below 0.3 V.

OK -- CHECK INTERMITTENT PROBLEMS
NG -- Continue to next step.

2. INSPECT POWER STEERING ECU (OUTPUT)





(a) Turn the ignition switch to ON.

(b) Measure the voltage.

Standard voltage:





NG -- REPLACE POWER STEERING ECU
OK -- Continue to next step.

3. INSPECT STEERING COLUMN ASSEMBLY (TORQUE SENSOR)





(a) Turn the ignition switch to ON.

(b) Measure the voltage.

Standard voltage:





NG -- REPLACE STEERING COLUMN ASSEMBLY

OK -- REPLACE POWER STEERING ECU

4. REPLACE POWER STEERING ECU

5. REPLACE STEERING COLUMN ASSEMBLY

6. CHECK INTERMITTENT PROBLEMS