Diagnosis Procedure
- CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- Check ground connection E15. Refer to Ground Inspection in Inspection .
Is the inspection result normal?
YES
GO TO 2.
NO
Repair or replace ground connection.
- CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT
- Turn ignition switch ON.
- Check the voltage between ECM harness connector and ground.
ECM
Condition
Voltage
(Approx.)
+
-
Connector
Terminal
Connector
Terminal
F25
71
E19
157
Ignition switch OFF
0 V
Ignition switch ON
Battery voltage
Is the inspection result normal?
YES
GO TO 10.
NO
GO TO 3.
- CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
- Turn ignition switch OFF.
- Check voltage between ECM harness connector and ground.
ECM
Voltage
+
-
Connector
Terminal
Connector
Terminal
F29
2
E19
157
Battery voltage
Is the inspection result normal?
YES
GO TO 6.
NO
GO TO 4.
- CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector F42.
- Check the continuity between ECM harness connector and IPDM E/R harness connector.
IPDM E/R
ECM
Continuity
Connector
Terminal
Connector
Terminal
F42
72
F29
2
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 8.
NO
GO TO 5.
- DETECT MALFUNCTIONING PART
Check the following.
- IPDM E/R connector F42
- Harness for open or short between IPDM E/R and ECM
Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-III
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector F42.
- Check the continuity between ECM harness connector and IPDM E/R harness connector.
IPDM E/R
ECM
Continuity
Connector
Terminal
Connector
Terminal
F42
67
F25
71
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 9.
NO
GO TO 7.
- DETECT MALFUNCTIONING PART
Check the following.
- IPDM E/R connector F42
- Harness for open or short between IPDM E/R and ECM
Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK FUSE
- Disconnect 15 A fuse (No. 49) from IPDM E/R.
- Check 15 A fuse for blown.
Is the inspection result normal?
YES
GO TO 9.
NO
Replace 15 A fuse.
- CHECK INTERMITTENT INCIDENT
Refer to Inspection .
Is the inspection result normal?
YES
Replace IPDM E/R. Refer to Removal and 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
F7
5
F29
3
Not existed
1
Existed
6
3
Existed
1
Not existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 11.
NO
Repair or replace harness or connectors.
- CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
- Remove the intake air duct. Refer to Exploded View
- Check if foreign matter is caught between the throttle valve and the housing.
Is the inspection result normal?
YES
GO TO 12.
NO
Remove the foreign matter and clean the electric throttle control actuator inside, and then perform throttle valve closed position learning. Refer to Description .
- CHECK THROTTLE CONTROL MOTOR
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 13.
NO
GO TO 14.
- CHECK INTERMITTENT INCIDENT
Refer to Inspection .
Is the inspection result normal?
YES
GO TO 14.
NO
Repair or replace harness or connectors.
- REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
Replace malfunction electric throttle control actuator. Refer to Exploded View .
INSPECTION END