Diagnosis Procedure

Regarding Wiring Diagram information, refer to -- appropriate Wiring Diagram

1. CHECK CONTROL MODULE GROUND CIRCUIT 
   1. Turn the ignition switch OFF.
   2. Disconnect steering angle main control module harness connector.
   3. Check the continuity between control module harness connector and ground.

      Steering angle main control module		--	Continuity
      Connector	Terminal
      E150	33	Ground	Yes
      E146	39

   Is the inspection result normal?

   YES

   GO TO 2.

   NO

   Repair open circuit or short to ground or short to power in harness or connectors.

2. CHECK CONTROL MODULE POWER SUPPLY CIRCUIT (1) 
   1. Turn the ignition switch ON.
   2. Check the voltage between control module harness connector and ground.

      Steering angle main control module		--	Voltage (Approx.)
      Connector	Terminal
      E150	34	Ground	Battery Voltage

   Is the inspection result normal?

   YES

   GO TO 4.

   NO

   GO TO 3.

3. CHECK CONTROL MODULE POWER SUPPLY CIRCUIT (2) 
   1. Turn the ignition switch OFF.
   2. Check the 100A fusible link (#G).
   3. Check the harness for open or short between steering angle main control module harness connector No. 34 terminal 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.

4. CHECK INTERMITTENT INCIDENT 
   1. Turn the 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. Refer to Removal and Installation .

   NO

   Repair or replace malfunctioning component.