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 |
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Precaution
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