DESCRIPTION
The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is comprised of a throttle actuator, which operates the throttle valve, and a throttle position sensor, which detects the opening amount of the throttle valve. The ECM controls the throttle actuator to adjust the throttle valve opening amount so that the idle speed is maintained at the target idle speed.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
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P210900 | Throttle/Pedal Position Sensor "A" Minimum Stop Performance | The ISC learned value is approximately 3 times larger than normal even though the actual intake air amount during idle is within the normal range (up to 1.5 times the normal amount) (1 trip detection logic). | Throttle body with motor assembly | Does not come on | DTC stored | SAE Code: P2109 |
HINT:
MONITOR DESCRIPTION
If there are deposits in the throttle valve, a decrease in the ISC flow rate may cause engine stall or unstable idling. Therefore, the necessary ISC flow rate for idling is maintained using the ISC learned value and feedback. The ECM stores this DTC if the ISC learned value approaches its limit. The ECM begins monitoring for the DTC detection conditions when the following preconditions are met:
CAUTION / NOTICE / HINT
NOTICE:
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(Select Powertrain in Health Check and then check the time stamp data.)
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Click here
HINT:
PROCEDURE
1. | CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P210900) |
(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 P210900 is output | A |
DTC P210900 and other DTCs are output | B |
HINT:
If any DTCs other than P210900 are output, troubleshoot those DTCs first.
B | GO TO DTC CHART |
|
2. | READ FREEZE FRAME DATA (ISC LEARNING VALUE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Using the Techstream, check "ISC Learning Value" in the Freeze Frame Data.
Powertrain > Engine > DTC(P210900) > Freeze Frame Data Tester Display |
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ISC Learning Value |
HINT:
Be sure to confirm that the Freeze Frame Data item "ISC Learning Value" is the same as that used when confirming whether the malfunction has been successfully repaired.
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3. | INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY |
(a) Check for foreign matter between the throttle valve and the housing.
*1 | Throttle Body with Motor Assembly | *2 | Bore |
*3 | Throttle Valve | - | - |
*a | Reference | *b | Throttle Body with Motor Assembly Cross-section Diagram |
*c | When valve fully opened | *d | Deposits |
HINT:
The illustration is for reference only, actual parts may differ.
Result | Proceed to |
---|---|
Foreign matter between the throttle valve and housing | A |
No foreign matter between the throttle valve and housing | B |
HINT:
Perform "Inspection After Repair" after replacing the throttle body with motor assembly.
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B | REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY |
|
4. | REMOVE FOREIGN MATTER (CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY) |
(a) Clean off any deposits inside of the throttle body with motor assembly.
*1 | Throttle Body with Motor Assembly | *2 | Bore |
*3 | Throttle Valve | - | - |
*a | Reference | *b | Throttle Body with Motor Assembly Cross-section Diagram |
*c | When valve fully opened | *d | Do not directly apply cleaner |
*e | Deposits | - | - |
(1) Push open the throttle valve and wipe off any deposits from the valve and bore using a cloth soaked in non-residue solvent.
NOTICE:
HINT:
Click here
|
5. | READ VALUE USING TECHSTREAM (ISC LEARNING VALUE) |
(a) Perform "Inspection After Repair" after cleaning the throttle body with motor assembly.
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(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine / Data List / ISC Learning Value.
Powertrain > Engine > Data List Tester Display |
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ISC Learning Value |
(f) According to the display on the Techstream, read the Data List.
OK:
The value of ISC Learning Value is half or less of ISC Learning Value recorded in the Freeze Frame Data.
HINT:
Perform "Inspection After Repair" after replacing the throttle body with motor assembly.
Click here
OK | END |
NG | REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY |