Dtc C15A2/62 Actuator Malfunction

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRE HARNESS (POWER SOURCE CIRCUIT)

CHECK WIRE HARNESS

CHECK STEERING ACTUATOR

CHECK DTC

DTC C15A2/62 Actuator Malfunction

DTC C15A6/62 Actuator Malfunction


DESCRIPTION

The steering control ECU drives the actuator based on steering angle sensor signals and vehicle speed signals.
If the steering control ECU detects excessive current flowing into the steering actuator, or an internal malfunction, it will turn on the master warning light, store DTC C15A2/62, and stop VGRS operation.
If the steering control ECU detects a malfunction in the predriver circuit, it will turn the master warning light on, store DTC C15A6/62, and stop VGRS operation.

DTC No.
DTC Detecting Condition
 Trouble Area
C15A2/62
The VGRS system detects a malfunction in the motor drive circuit.
  1. Wire harness and connector
  2. Power source circuit
  3. Steering actuator
  4. Steering control ECU
C15A6/62
The actual motor current value greatly differs from the estimated value.
  1. Power source circuit
  2. Wire harness and connector
  3. Steering actuator
  4. Steering control ECU

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System. Dtc C15A2/62 Actuator Malfunction


INSPECTION PROCEDURE

HINT:
The actuator only can be checked in this procedure. If it is normal, the steering control ECU is faulty.
1.CHECK WIRE HARNESS (POWER SOURCE CIRCUIT)


    Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System. Dtc C15A2/62 Actuator Malfunction

  1. Turn the engine switch off.

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

    Resistance:
    Tester connection
    		Specified condition
    A42-7 (PGND) - Body ground
    		Below 1 Ω

  1. Turn the engine switch on (IG).

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

    Voltage:
    Tester connection
    		Specified condition
    A42-8 (PIG) - Body ground
    		10 to 14 V


NG
REPAIR OR REPLACE WIRE HARNESS
OK


2.CHECK WIRE HARNESS


    Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System. Dtc C15A2/62 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) - L26-5 (BMV+)
    		Below 1 Ω
    L69-2 (BMU) - L26-4 (BMU+)
    		Below 1 Ω
    L69-3 (BMW) - L26-13 (BMW+)
    		Below 1 Ω
    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


3.CHECK STEERING ACTUATOR


    Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System. Dtc C15A2/62 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) - L69-2 (BMU)
    		Below 1 Ω
    L69-1 (BMV) - L69-3 (BMW)
    		Below 1 Ω
    L69-2 (BMU) - L69-3 (BMW)
    		Below 1 Ω
    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


4.CHECK DTC

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the intelligent tester on.

  1. Check for DTCs (Click here).

    OK:
    DTC C15A1/61 is not output.


NG
REPLACE STEERING ACTUATOR
OK

REPLACE STEERING CONTROL ECU