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.
- CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
- 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.
- Check the voltage between ECM harness connector and ground under the following conditions.
- CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector.
- 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
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 4.
NO
GO TO 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.
- CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
- 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
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 6.
NO
GO TO 5.
- Check the continuity between ECM harness connector and IPDM E/R harness connector.
- 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.
- CHECK FUSE
- Disconnect 20 A fuse (No. 64) from IPDM E/R.
- Check 20 A fuse for blown.
Is the inspection result normal?
YES
GO TO 7.
NO
Replace 20 A fuse.
- CHECK INTERMITTENT INCIDENT
Refer to Inspection .
Is the inspection result normal?
YES
Replace IPDM E/R. Refer to IPDM E/R : Removal & Installation .
NO
Repair or replace harness or connectors.
- CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
- Turn ignition switch OFF.
- Disconnect electric throttle control actuator harness connector.
- Disconnect ECM harness connector.
- 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
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 9.
NO
Repair or replace.
- CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
- Remove the intake air duct.
- 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 .
- CHECK THROTTLE CONTROL MOTOR
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 11.
NO
GO TO 12.
- CHECK INTERMITTENT INCIDENT
Refer to Inspection .
Is the inspection result normal?
YES
GO TO 12.
NO
Repair or replace harness or connectors.
- REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
- Replace malfunction electric throttle control actuator. Refer to INTAKE MANIFOLD : Removal & Installation .
- Refer to Work Procedure .
INSPECTION END