DTC Diagnosis Procedure

Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle control motor is operated by the ECM and it opens and closes the throttle valve. The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feedback to the ECM. ECM controls the throttle valve opening angle in response to driving condition via the throttle control motor.

1. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I 
   1. Check the voltage between ECM harness connector and ground under the following conditions.

      ECM		Ground	Condition	Voltage
      Connector	Terminal
      F92	111	Ground	Ignition switch: OFF	Approx. 0 V
      			Ignition switch: ON	Battery voltage

   Is the inspection result normal?

   YES>>

   GO TO 8.

   NO>>

   GO TO 2.

2. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect ECM harness connector.
   3. Disconnect IPDM E/R harness connector.
   4. Check the continuity between ECM harness connector and IPDM E/R harness connector.

      IPDM E/R		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      E15	60	F92	99	Existed

   5. Also check harness for short to ground and short to power.

   Is the inspection result normal?

   YES>>

   GO TO 4.

   NO>>

   GO TO 3.

3. DETECT MALFUNCTIONING PART 

   Check the following.

   • Harness for open or short between ECM and IPDM E/R
   • Loose or poor connection for each connector and harness

   >>

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

4. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II 
   1. Check the continuity between ECM harness connector and IPDM E/R harness connector.

      IPDM E/R		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      E15	55	F92	111	Existed

   2. Also check harness for short to ground and short to power.

   Is the inspection result normal?

   YES>>

   GO TO 6.

   NO>>

   GO TO 5.

5. DETECT MALFUNCTIONING PART 

   Check the following.

   • Harness for open or short between ECM and IPDM E/R
   • Loose or poor connection for each connector and harness

   >>

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

6. CHECK FUSE 
   1. Disconnect 20 A fuse (No. 64) from IPDM E/R.
   2. Check 20 A fuse for blown.

   Is the inspection result normal?

   YES>>

   GO TO 7.

   NO>>

   Replace 20 A fuse.

7. CHECK INTERMITTENT INCIDENT 

   Refer to Inspection . Is the inspection result normal?

   YES>>

   Replace IPDM E/R. Refer to IPDM E/R : Removal and Installation .

   NO>>

   Repair or replace harness or connectors.

8. CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT 
   1. Turn ignition switch OFF.
   2. Disconnect electric throttle control actuator harness connector.
   3. Disconnect ECM harness connector.
   4. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.

      Electric throttle control actuator		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      F94	6	F92	107	Not existed
      			108	Existed
      	5		107	Existed
      			108	Not existed

   5. Also check harness for short to ground and short to power.

   Is the inspection result normal?

   YES>>

   GO TO 9.

   NO>>

   Repair or replace.

9. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY 
   1. Remove the intake air duct.
   2. Check if foreign matter is caught between the throttle valve and the housing.

   Is the inspection result normal?

   YES>>

   GO TO 10.

   NO>>

   Remove the foreign matter and clean the electric throttle control actuator inside, then perform throttle valve closed position learning. Refer to Work Procedure .

10. CHECK THROTTLE CONTROL MOTOR 

    Refer to Component Inspection . Is the inspection result normal?

    YES>>

    GO TO 11.

    NO>>

    GO TO 12.

11. CHECK INTERMITTENT INCIDENT 

    Refer to Inspection . Is the inspection result normal?

    YES>>

    GO TO 12.

    NO>>

    Repair or replace harness or connectors.

12. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR 
    1. Replace malfunction electric throttle control actuator. Refer to INTAKE MANIFOLD : Removal and Installation .
    2. Refer to Work Procedure .

    >>

    INSPECTION END