DTC    C15A2/62    Actuator Malfunction

DTC    C15A6/62    Actuator Malfunction

for Preparation Click here


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


C111966E01


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)


    C107435E04

  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


    C110890E02

  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


    C107439E04

  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