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. |
DTC Detection Condition |
Trouble Area |
---|---|---|
P2109 |
The ISC learned value is approximately 3 times larger than normal even though the actual intake air amount during idling is within the normal range (up to 1.5 times the normal amount) (5 trip detection logic). |
Throttle body |
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
HINT:
PROCEDURE
1. |
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2109) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Result
Result |
Proceed to |
---|---|
DTC P2109 is output |
A |
DTC P2109 and other DTCs are output |
B |
HINT:
If any DTCs other than P2109 are output, troubleshoot those DTCs first.
B | ![]() |
GO TO DTC CHART |
|
2. |
READ FREEZE FRAME DATA |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, check "ISC Learning Value" in the freeze frame data
(See page ).
HINT:
Be sure to confirm "ISC Learning Value" in the freeze frame data as it is used when confirming whether the malfunction has been successfully repaired.
|
3. |
REMOVE FOREIGN OBJECT (CLEAN THROTTLE BODY) |
(a) Clean off any deposits from the inside of the throttle body.
Text in Illustration
*1 |
Bore |
*2 |
Valve |
*a |
Reference |
*b |
Throttle Body Cross-section Diagram |
*c |
When valve fully opened |
*d |
Deposits |
*e |
Do not directly apply cleaner |
(1) Push open the throttle valve and wipe off any carbon from the valve and bore using a cloth soaked in non-residue solvent.
NOTICE:
HINT:
If the throttle valve does not open smoothly, replace the throttle body.
|
4. |
READ VALUE USING TECHSTREAM (ISC LEARNING VALUE) |
(a) Perform "Inspection After Repair" after cleaning the throttle body (See page
).
(b) Connect the Techstream to the DLC3.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Primary / ISC Learning Value.
(e) Read the value.
OK:
The value is half of "ISC Learning Value" recorded in the freeze frame data or less.
HINT:
Perform "Inspection After Repair" after replacing the throttle body (See page
).
OK | ![]() |
END |
NG | ![]() |
REPLACE THROTTLE BODY |
Air Conditioning Amplifier Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Air Conditioning Amplifier Communication Stop Mode
"Air Conditioner" is not displayed on "CAN Bus Check" screen
o ...
System Voltage (P0560)
DESCRIPTION
The battery supplies electricity to the ECM even when the ignition switch is
off. This power allows the ECM to store data such as DTC history, freeze frame data
and fuel trim values. If the battery voltage falls below a minimum level, the stor ...
Rear Power Window RH does not Operate with Rear Power Window Switch RH
DESCRIPTION
When the engine is running or the ignition switch is ON, the power window regulator
motor assembly (for rear RH side) is operated by the power window regulator switch
assembly (for rear RH side). The power window regulator motor assembly (for ...