DTC Diagnosis Procedure

1. 1. Ignition switch OFF.
   2. Disconnect each control module connector.
   3. Check the continuity between each control module harness connector.

      Steering force control module		Steering angle main control module		Continuity
      Connector	Terminal	Connector	Terminal
      E141	19	E149	19	Yes
      	20		20

      Steering angle main control module		Steering angle sub control module		Continuity
      Connector	Terminal	Connector	Terminal
      E149	19	E144	19	Yes
      	20		20

      Steering force control module		Steering angle sub control module		Continuity
      Connector	Terminal	Connector	Terminal
      M141	19	E144	19	Yes
      	20		20

   4. Check the continuity between control module harness connector and ground.

      Steering force control module		-	Continuity
      Connector	Terminal
      M141	19	Ground	No
      	20

      Steering angle main control module		-	Continuity
      Connector	Terminal
      E149	19	Ground	No
      	20

      Steering angle sub control module		-	Continuity
      Connector	Terminal
      E144	19	Ground	No
      	20

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning component.

1. 1. Ignition switch OFF.
   2. Disconnect steering force control module connector.
   3. Check the voltage between steering force control module harness connector and ground.

      (+)		(-)	Voltage(Approx.)
      Steering force control module
      Connector	Terminal
      M142	33	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 3.

1. 1. Check the 60A fusible link (#Q).
   2. Check the harness for open or short between steering force control module harness connector E142 terminal 33 and the 60A fusible link (#Q).

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for battery power supply circuit. Refer to appropriate Wiring Diagram.

NO>>

Repair or replace malfunctioning component.

1. 1. Disconnect steering angle main control module connector.
   2. Check the voltage between steering angle main control module harness connector and ground.

      (+)		(-)	Voltage(Approx.)
      Steering angle main control module
      Connector	Terminal
      E150	33	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

GO TO 5.

1. 1. Check the 100A fusible link (#G).
   2. Check the harness for open or short between steering angle main control module harness connector E150 terminal 33 and the 100A fusible link (#G).

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for battery power supply circuit. Refer to appropriate Wiring Diagram.

NO>>

Repair or replace malfunctioning component.

1. 1. Disconnect steering angle sub control module connector.
   2. Check the voltage between steering angle sub control module harness connector and ground.

      (+)		(-)	Voltage(Approx.)
      Steering angle sub control module
      Connector	Terminal
      E145	33	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

GO TO 7.

1. 1. Check the 100A fusible link (#Z).
   2. Check the harness for open or short between steering angle sub control module harness connector E145 terminal 33 and the 100A fusible link (#Z).

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for battery power supply circuit. Refer to appropriate Wiring Diagram.

NO>>

Repair or replace malfunctioning component.

1. Check ignition power supply circuit. Refer to DTC Diagnosis Procedure .

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Repair or replace malfunctioning component.

1. 1. Ignition switch OFF.
   2. Check enlarged contact spring of terminal. Refer to How to Check Terminal .
   3. Perform intermittent incident while turning steering wheel. Refer to Intermittent Incident .

Is the inspection result normal?

YES>>

Replace steering angle main control module, steering angle sub control module and steering force control module. Refer to Removal and Installation (steering angle main control module), Removal and Installation (steering angle sub control module) and Removal and Installation (steering force control module).

NO>>

Repair or replace malfunctioning component.