P2101
P2101 Electric Throttle Control Function
Description
NOTE:
If DTC P2101 is displayed with DTC P2100 or 2119, first perform the trouble diagnosis for DTC P2100 or P2119. Refer to [Power Supply and Ground Circuit Check] P2100 or P2119.
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 to control the throttle control motor to make the throttle valve opening angle properly in response to driving condition.
On Board Diagnosis Logic
This self-diagnosis has the one trip detection logic.
Fail-Safe Mode
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V when engine is running.
with SDT
1) Turn ignition switch ON and wait at least 2 seconds.
2) Start engine and let it idle for 5 seconds.
3) Check DTC.
4) If DTC is detected, go to "Diagnosis Procedure".
with GST
Follow the procedure "WITH SDT" above.
Diagnosis Procedure
1. CHECK GROUND CONNECTIONS
1 Turn ignition switch OFF.
2 Loosen and retighten two ground screws on the body. Refer to Power Supply and Ground Circuit Check.
OK or NG
OK
GO TO 2.
NG
Repair or replace ground connections.
2. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
Check voltage between ECM terminal 3 and ground under the following conditions with SDT or tester.
OK or NG
OK
GO TO 9.
NG
GO TO 3.
3. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1 Turn ignition switch OFF.
2 Check voltage between ECM terminal 104 and ground with SDT or tester.
OK or NG
OK
GO TO 6.
NG
GO TO 4.
4. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1 Disconnect ECM harness connector.
2 Disconnect IPDM E/R harness connector E122.
3 Check harness continuity between ECM terminal 104 and IPDM E/R terminal 47.
Refer to Wiring Diagram.
4 Also check harness for short to ground and short to power.
OK or NG
OK
GO TO 5.
NG
Repair open circuit, short to ground or short to power in harness or connectors.
5. CHECK FUSE
1 Disconnect 20 A fuse (No.52).
2 Check 20 A fuse for blown.
OK or NG
OK
GO TO 8.
NG
Replace 20 A fuse.
6. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1 Disconnect ECM harness connector.
2 Disconnect IPDM E/R harness connector E119.
3 Check continuity between ECM terminal 3 and IPDM E/R terminal 6.
Refer to Wiring Diagram.
4 Also check harness for short to ground and short to power.
OK or NG
OK
GO TO 8.
NG
GO TO 7.
7. DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between ECM and IPDM E/R
Repair open circuit, short to ground or short to power in harness or connectors.
8. CHECK INTERMITTENT INCIDENT
Refer to [Service Information for Electrical Incident: Intermittent Incident] Service Information for Electrical Incident: Intermittent Incident.
OK or NG
OK
Replace IPDM E/R. Refer to [IPDM E/R: Removal and Installation of IPDM E/R] Service and Repair.
NG
Repair or replace harness or connectors.
9. 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 harness continuity between the following terminals.
Refer to Wiring Diagram.
5 Also check harness for short to ground and short to power.
OK or NG
OK
GO TO 10.
NG
Repair or replace.
10. 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.
OK or NG
OK
GO TO 11.
NG
Remove the foreign matter and clean the electric throttle control actuator inside, and then perform throttle valve closed position learning. Refer to [Throttle Valve Closed Position Learning] Throttle Valve Closed Position Learning.
11. CHECK THROTTLE CONTROL MOTOR
Refer to "Component Inspection".
OK or NG
OK
GO TO 12.
NG
GO TO 13.
12. CHECK INTERMITTENT INCIDENT
Refer to [Service Information for Electrical Incident: Intermittent Incident] Service Information for Electrical Incident: Intermittent Incident.
OK or NG
OK
GO TO 13.
NG
Repair or replace harness or connectors.
13. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1 Replace the electric throttle control actuator. Refer to [Intake Manifold: Exploded View] Intake Manifold Exploded View.
2 Perform [Throttle Valve Closed Position Learning] Throttle Valve Closed Position Learning.
3 Perform [Idle Air Volume Learning] Idle Air Volume Learning.
INSPECTION END
Component Inspection
Throttle Control Motor
1) Disconnect electric throttle control actuator harness connector.
2) Check resistance between terminals 5 and 6.
3) If NG, replace electric throttle control actuator and go to next step.
4) Perform [Throttle Valve Closed Position Learning] Throttle Valve Closed Position Learning.
5) Perform [Idle Air Volume Learning] Idle Air Volume Learning.