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.
Click here .gif)
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 |
|
.gif)
| 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:
Vehicle Speed Signal (C1541)
DESCRIPTION The power steering ECU assembly receives vehicle speed signals from the skid control ECU via CAN communication. The ECU provides appropriate assisting force in accordance with the vehicle
IG Power Supply Voltage (C1551)
DESCRIPTION The power steering ECU assembly distinguishes the power switch status as on (IG) or off through the IG power source circuit. DTC No. Detection Item DTC Detection Condition Trouble
PIG Power Supply Voltage (C1552,C1554)
DESCRIPTION When a problem occurs in the power steering system, the power source relay circuit is shut off to stop the power assist. DTC No. Detection Item DTC Detection Condition Trouble Are
SEE MORE:
Data List / Active Test
DATA LIST / ACTIVE TEST NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
When diagnosing symptoms such as hesitation, rough idle, or other small symptoms usi
Installation
INSTALLATION CAUTION / NOTICE / HINT CAUTION:
Wear protective gloves. Sharp areas on the parts may injure your hands.
If the side airbag was deployed, replace the front seat airbag assembly LH, separate type front seatback spring assembly, seatback felt, separate type front seatback cover and s
