DESCRIPTION
The idle speed is controlled by the electronic throttle control system. The electronic throttle control system is comprised of: 1) one valve type throttle body with motor assembly; 2) the throttle actuator, which operates the throttle valve; 3) the throttle position sensor, which detects the opening angle of the throttle valve; 4) the accelerator pedal position sensor, which detects the accelerator pedal position; 5) the ECM, which controls the electronic throttle control system. Based on the target idle speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
---|---|---|---|---|---|---|
P050500 | Idle Control System | The idle speed differs largely from the target idle speed (2 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0505 |
MONITOR DESCRIPTION
The ECM monitors the idle speed and idling air flow volume to conduct idle speed control. The ECM determines that the idle speed control system is malfunctioning if either of the following conditions is met:
MONITOR STRATEGY
Related DTCs | P0505: Idle speed control system functional check |
Required Sensors/Components (Main) | Electronic throttle control system |
Required Sensors/Components (Related) | Crankshaft position sensor Engine coolant temperature sensor Vehicle speed sensor |
Frequency of Operation | Continuous |
Duration | 5 seconds |
MIL Operation | 2 driving cycles |
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored | P0010, P1360, P1362, P1364, P1366, P2614 (Motor drive VVT system control module) P0011 (VVT system - advance) P0012 (VVT system - retard) P0013 (Exhaust VVT oil control solenoid) P0014 (Exhaust VVT system - advance) P0015 (Exhaust VVT system - retard) P0016 (VVT system - misalignment) P0017 (Exhaust VVT system - misalignment) P0031, P0032, P101D (Air fuel ratio sensor (sensor 1) heater) P0101, P0102, P0103 (Mass air flow meter) P0107, P0108 (Manifold absolute pressure) P0116, P0117, P0118 (Engine coolant temperature sensor) P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor) P0125 (Insufficient coolant temperature for closed loop fuel control) P014C, P014D, P015A, P015B, P2195, P2196, P2237, P2238, P2239, P2252, P2253 (Air fuel ratio sensor (sensor 1)) P0171, P0172 (Fuel system) P0300, P0301, P0302, P0303, P0304 (Misfire) P0335, P0337, P0338 (Crankshaft position sensor) P0340, P0342, P0343 (Camshaft position sensor) P0365, P0367, P0368 (Exhaust camshaft position sensor) P0401 (EGR system (closed)) P0657, P0658, P2102, P2103, P2111, P2112, P2119 (Throttle actuator) P11EA, P11EC, P11ED, P11EE, P11EF, P219A, P219C, P219D, P219E, P219F (Air-fuel ratio imbalance) P1452, P1453 (EVAP system) P2228, P2229 (Atmospheric pressure sensor) |
Engine | Running |
TYPICAL MALFUNCTION THRESHOLDS
Either of the following conditions is met | 1 or 2 |
1. Both of the following conditions A and B met | - |
A. Engine speed - Target engine speed | Less than -100 rpm, or higher than 150 rpm |
B. Idle control correction value | -7 Nm or less, or 40 Nm or more for 5 seconds or more |
2. Both of the following conditions C and D met | - |
C. Frequency that all of following conditions (a), (b) and (c) met | 5 times or more |
(a) Engine speed - Target engine speed | Less than -100 rpm, or higher than 150 rpm |
(b) Idle control learning value (value when last idle) | -5 Nm or less, or 10 Nm or more |
(c) Vehicle condition | Stopped after being driven at 10 km/h (6.25 mph) or more |
D. Amount of change Idle control correction value | -25.84 Nm or less, or 20.91 Nm or more |
CONFIRMATION DRIVING PATTERN
HINT:
Click here
Click here
Click here
HINT:
When clearing permanent DTCs, proceed to the next step without disconnecting the cable from the auxiliary battery terminal.
Click here
HINT:
During charge control, the engine speed is set at idle. Therefore, the engine speed will not increase when the accelerator pedal is depressed. In this case, perform step [C] after charge control has completed.
HINT:
In order to keep the idling stable, turn off the A/C and all other electric loads and do not perform any shift operations.
HINT:
Techstream Display | Description |
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NORMAL |
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ABNORMAL |
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INCOMPLETE |
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HINT:
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
If the engine stops, further depress the accelerator pedal to restart the engine.
HINT:
During charge control, the engine speed is set at idle. Therefore, the engine speed will not increase when the accelerator pedal is depressed. In this case, perform step [G] after charge control has completed.
HINT:
Techstream Display | Description |
---|---|
NORMAL |
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ABNORMAL |
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INCOMPLETE |
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HINT:
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
CAUTION / NOTICE / HINT
NOTICE:
Click here
(Select Powertrain in Health Check and then check the time stamp data.)
Click here
Click here
HINT:
Click here
PROCEDURE
1. | CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050500) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine > Trouble Codes Result | Proceed to |
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DTC P050500 is output | A |
DTC P050500 and other DTCs are output | B |
HINT:
If any DTCs other than P050500 are output, troubleshoot those DTCs first.
B | GO TO DTC CHART |
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2. | CHECK PCV VALVE AND HOSE CONNECTIONS |
(a) Check the PCV hose connections.
(b) Check the PCV valve.
Click here
OK:
PCV hose and PCV valve are connected correctly and are not damaged.
NG | REPAIR OR REPLACE PCV VALVE OR HOSE |
|
3. | CHECK INTAKE SYSTEM |
(a) Check the intake system for vacuum leaks.
Click here
OK:
No leaks from the intake system.
HINT:
Perform "Inspection After Repair" after repairing or replacing the intake system.
Click here
NG | REPAIR OR REPLACE INTAKE SYSTEM |
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4. | PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility Tester Display |
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Inspection Mode |
(e) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.
HINT:
The A/C switch and all accessories should be off.
(f) Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Intake Manifold Absolute Pressure , Coolant Temperature and Engine Independent.
Powertrain > Engine > Active Test Active Test Display |
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Control the EGR Step Position |
Data List Display |
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Intake Manifold Absolute Pressure |
Coolant Temperature |
Engine Independent |
(g) Confirm that the value of Data List item Engine Independent is "Operate" then check the value of Intake Manifold Absolute Pressure while performing the Active Test.
NOTICE:
OK:
The value of Intake Manifold Absolute Pressure changes in response to the EGR step position when the value of Engine Independent is "Operate".
Standard:
- | Control the EGR Step Position (Active Test) | |
---|---|---|
0 Steps | 0 to 30 Steps | |
Intake Manifold Absolute Pressure (Data List) | (EGR valve is fully closed) | Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed |
HINT:
OK | GO TO STEP 6 |
|
5. | INSPECT EGR VALVE ASSEMBLY |
(a) Remove the EGR valve assembly.
Click here
(b) Check if the EGR valve is stuck open.
OK:
EGR valve is tightly closed.
HINT:
Perform "Inspection After Repair" after replacing the EGR valve assembly.
Click here
NG | REPLACE EGR VALVE ASSEMBLY |
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6. | INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (THROTTLE VALVE) |
(a) Check the throttle body with motor assembly condition.
OK:
Throttle valve is not contaminated with foreign matter and moves smoothly.
HINT:
Perform "Inspection After Repair" after replacing the throttle body with motor assembly.
Click here
NG | REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY |
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7. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs(e) Turn the power switch off and wait for at least 30 seconds.
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8. | CONFIRM WHETHER DTC OUTPUT RECURS (DTC P050500) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Trouble Codes.
(c) Read the pending DTCs.
Powertrain > Engine > Trouble Codes Result | Proceed to |
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DTCs are not output | A |
DTC P050500 is output | B |
A | END |
B | REPLACE ECM |