1A-156 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and
confirm that the trouble has been corrected.
DTC P2111 / P2112: Throttle Actuator Control System - Stuck Open / Closed
S7RS0B1104070
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Ignition switch turned OFF for 20 sec. or more.
4) Turn ON ignition switch and check DTC.
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed?
Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 Throttle actuator control relay circuit check
1) Remove throttle actuator control relay from individual
circuit fuse box No.1 with ignition switch turned OFF.
2) Check for proper connection to throttle actuator control
relay “BLK/RED”, “YEL/BLU”, “BLU/ORN” and “RED/
YEL” wire terminals.
3) Turn ON ignition switch.
4) Measure voltage between engine ground and “E23-32”
terminal of ECM connector.
Is voltage 0 V?
Go to Step 3. “RED/YEL” wire is
shorted to other circuit.
3 Throttle actuator control relay circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between engine ground and “E23-
45” terminal of ECM connector.
Is resistance infinity?
Go to Step 4. “BLU/ORN” wire is
shorted to ground
circuit.
4 Throttle actuator control relay check
1) Check throttle actuator control relay referring to “Main
Relay, Fuel Pump Relay and Starting Motor Control
Relay Inspection in Section 1C”.
Is it in good condition?
Substitute a known-
good ECM and recheck.
Replace throttle
actuator control relay.
DTC detecting condition Trouble area
P2111:
Throttle valve default opening is greater than 6° from
complementary closed position when diagnosing throttle
valve at ignition switch turned OFF.
(1 driving detection logic)
P2112:
Throttle valve default opening is smaller than 6° from
complementary closed position when diagnosing throttle
valve at ignition switch turned OFF.
(1 driving detection logic)
• Electric throttle body
•ECM
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