Torque Sensor Circuit Malfunction - Power Steering System

POWER STEERING: POWER STEERING SYSTEM: C1511/11: Torque Sensor 1 Malfunction

DTC C1511/11 - Torque Sensor 1 Malfunction

DTC C1512/12 - Torque Sensor Circuit Malfunction

DTC C1513/13 - Torque Sensor Circuit Malfunction

DTC C1514/14 - Torque Sensor Power Source Circuit Malfunction

DTC 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 (TORQUE SENSOR OUTPUT)
(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:





(f) 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.
NG -- INSPECT POWER STEERING ECU (TRQV VOLTAGE)
OK -- CHECK FOR INTERMITTENT PROBLEMS
2. INSPECT 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:






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 according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE STEERING COLUMN ASSEMBLY
OK -- REPLACE POWER STEERING ECU