Dtc C15A1/61 Actuator Malfunction

Steering. Lexus Gs430, Gs300. Uzs190 Grs190
Steering Column. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRE HARNESS

CHECK STEERING ACTUATOR

DTC C15A1/61 Actuator Malfunction


DESCRIPTION

The steering control ECU drives the actuator while the steering wheel is turned to set the gear ratio. It detects the current flowing into the actuator motor driving circuit.
If the steering control ECU detects excessive current, it will store this DTC C15A1/61, turn on the master warning light, and stop VGRS operation.

DTC No.
DTC Detecting Condition
Trouble Area
C15A1/61
Excessive current (exceeding the estimated amount) flows due to a malfunction in the motor drive circuit.
  1. Wire harness and connector
  2. Steering actuator
  3. Steering control ECU

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System. Dtc C15A1/61 Actuator Malfunction


INSPECTION PROCEDURE

HINT:
When DTC C15A2/62 is output, a short circuit inside the steering actuator or inside the steering control ECU is suspected.
1.CHECK WIRE HARNESS


    Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System. Dtc C15A1/61 Actuator Malfunction

  1. Turn the engine switch off.

  1. Disconnect the connectors from the steering control ECU and the steering actuator.

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

    Resistance:
    Tester connection
    		Specified condition
    L69-1 (BMV) - L69-2 (BMU)
    		10 kΩ or higher
    L69-1 (BMV) - L69-3 (BMW)
    		10 kΩ or higher
    L69-2 (BMU) - L69-3 (BMW)
    		10 kΩ or higher
    L69-1 (BMV) - Body ground
    		10 kΩ or higher
    L69-2 (BMU) - Body ground
    		10 kΩ or higher
    L69-3 (BMW) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE WIRE HARNESS
OK


2.CHECK STEERING ACTUATOR


    Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System. Dtc C15A1/61 Actuator Malfunction

  1. Connect the connector to the steering actuator.

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

    Resistance:
    Tester connection
    		Specified condition
    L69-1 (BMV) - Body ground
    		10 kΩ or higher
    L69-2 (BMU) - Body ground
    		10 kΩ or higher
    L69-3 (BMW) - Body ground
    		10 kΩ or higher


NG
REPLACE STEERING ACTUATOR
OK

REPLACE STEERING CONTROL ECU