Lexus NX: Motor Rotation Angle Sensor (C1528)
DESCRIPTION
The motor rotation angle sensor detects the motor rotation angle and sends this information to the power steering ECU assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition |
|---|---|---|---|---|---|
| C1528 | Motor Rotation Angle Sensor | Motor rotation angle sensor malfunction |
| On | Power switch on (IG) again |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
If the power steering ECU assembly has been replaced, perform assist map writing.
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PROCEDURE
| 1. | CHECK CONNECTOR CONNECTION CONDITION |
(a) Check the connection condition of the motor rotation angle sensor connector.
OK:
Motor rotation angle sensor connector is securely connected to the power steering ECU assembly.
| NG | .gif) | CONNECT CONNECTOR |
|
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| 2. | READ VALUE USING TECHSTREAM (MOTOR ROTATION ANGLE) |
(a) Turn the power switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (READY).
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / EMPS / Data List.
(f) Select the item "Motor Rotation Angle" in the Data List and read the value displayed on the Techstream.
Chassis > EMPS > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Motor Rotation Angle | Motor rotation angle | Min.: 0.000 deg Max.: 1441.770 deg | Power switch on (READY) and steering wheel being turned: During steering operation, motor rotation angle value changes from 0 to 360 deg | - |
| Tester Display |
|---|
| Motor Rotation Angle |
OK:
During steering operation, motor rotation angle value changes from 0 to 360°.
| OK | | REPLACE POWER STEERING ECU ASSEMBLY |
|
| 3. | CHECK POWER STEERING MOTOR ASSEMBLY (MOTOR ROTATION ANGLE SENSOR) |
| (a) Disconnect the b motor rotation angle sensor connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| b-6 (RZV1) - b-2 (RZV2) | 25°C (77°F) | 14.0 to 17.2 Ω |
| b-5 (RZCS1) - b-1 (RZCS2) | 25°C (77°F) | 25.8 to 31.6 Ω |
| b-7 (RZSN1) - b-3 (RZSN2) | 25°C (77°F) | 25.8 to 31.6 Ω |
| OK | | REPLACE POWER STEERING ECU ASSEMBLY |
| NG | | REPLACE POWER STEERING MOTOR ASSEMBLY |
READ NEXT:
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SEE MORE:
Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE 1. TEMPORARILY INSTALL REAR TRAILING ARM ASSEMBLY LH (a) Temporarily install the rear trailing arm assembly LH to the rear suspension arm bracke
Components
COMPONENTS ILLUSTRATION *1 DECK FLOOR BOX LH *2 NO. 3 DECK BOARD SUB-ASSEMBLY *3 REAR DECK FLOOR BOX *4 AUXILIARY BATTERY NEGATIVE TERMINAL N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *1 COWL SIDE TRIM BOARD LH *2 DOOR SCUFF PLATE ASSEMBLY LH
