RX400h · Service Manual STEERING

C1511 Torque sensor (TRQ1) signal error or stop

Diagnostic trouble codes

DESCRIPTION

The torque sensor converts rotation torque input to the steering wheel into an electrical signal and sends it to the ECU. Based on this signal, the ECU detects steering effort.
DTC No.
 Detection Item
 Trouble Area
C1511
 Torque sensor (TRQ1) signal error or stop
  1. Wire harness or connector
  2. Torque sensor (built into power steering link assembly)
  3. Power steering ECU assembly
C1512
 Torque sensor (TRQ2) signal error or stop
  1. Wire harness or connector
  2. Torque sensor (built into power steering link assembly)
  3. Power steering ECU assembly
C1513
 Deviation between torque sensors TRQ1 and TRQ2 is out of specification
  1. Wire harness or connector
  2. Torque sensor (built into power steering link assembly)
  3. Power steering ECU assembly

WIRING DIAGRAM

C106487E06

INSPECTION PROCEDURE


1. CHECK HARNESS AND CONNECTOR (BETWEEN POWER STEERING ECU ASSEMBLY AND TORQUE SENSOR)

  1. C110600E04
    Disconnect the P42 connector from the power steering ECU assembly.

  1. Disconnect the P45 connector from the torque sensor.

  1. Measure the resistance according to the value(s) in the table below.

    Resistance:
    Tester connection
    (Symbols)
    		 Condition
    		 Specified condition
    P45-1 (INCS) - P42-8 (INCS)
    		 Always
    		 Below 1 Ω
    P45-2 (INSN) - P42-7 (INSN)
    		 Always
    		 Below 1 Ω
    P45-4 (TRQV) - P42-1 (TRQV)
    		 Always
    		 Below 1 Ω
    P45-5 (OUCS) - P42-10 (OUCS)
    		 Always
    		 Below 1 Ω
    P45-6 (OUSN) - P42-9 (OUSN)
    		 Always
    		 Below 1 Ω
    P45-7 (TQG2) - P42-14 (TQG2)
    		 Always
    		 Below 1 Ω
    P45-8 (TQG1) - P42-12 (TQG1)
    		 Always
    		 Below 1 Ω
    P45-1 (INCS) - Body ground
    		 Always
    		 10 kΩ or higher
    P45-2 (INSN) - Body ground
    		 Always
    		 10 kΩ or higher
    P45-4 (TRQV) - Body ground
    		 Always
    		 10 kΩ or higher
    P45-5 (OUCS) - Body ground
    		 Always
    		 10 kΩ or higher
    P45-6 (OUSN) - Body ground
    		 Always
    		 10 kΩ or higher
    P45-7 (TQG2) - Body ground
    		 Always
    		 10 kΩ or higher
    P45-8 (TQG1) - Body ground
    		 Always
    		 10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2. INSPECT POWER STEERING LINK ASSEMBLY (TORQUE SENSOR)

  1. C102953E09
    Measure the resistance according to the value(s) in the table below.

    Resistance:
    Tester connection
    (Symbols)
    		 Condition
    		 Specified condition
    P45-1 (INCS) - P45-7 (TQG2)
    		 Always
    		 90 to 170 Ω
    P45-2 (INSN) - P45-7 (TQG2)
    		 Always
    		 300 to 430 Ω
    P45-4 (TRQV) - P45-8 (TQG1)
    		 Always
    		 4 to 14 Ω
    P45-5 (OUCS) - P45-7 (TQG2)
    		 Always
    		 90 to 170 Ω
    P45-6 (OUSN) - P45-7 (TQG2)
    		 Always
    		 300 to 430 Ω

    NOTICE:
    If replacing the power steering link assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate torque sensor zero point (Click here).



 NG
REPLACE POWER STEERING LINK ASSEMBLY
OK


3. REPLACE POWER STEERING ECU ASSEMBLY

  1. Replace the power steering ECU assembly (Click here).


NEXT


4. INITIALIZE ROTATION ANGLE SENSOR VALUE AND CALIBRATE TORQUE SENSOR ZERO POINT

  1. Initialize the rotation angle sensor value and calibrate the torque sensor zero point (Click here).


NEXT


5. RECONFIRM DTC

  1. Check for DTCs (Click here).

  1. Is DTC C1511, C1512 or C1513 output?

    OK:
    DTC is not output.

    NOTICE:
    If replacing the power steering link assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate torque sensor zero point (Click here).



 NG
REPLACE POWER STEERING LINK ASSEMBLY
OK

END


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