Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1GR-FE ENGINE CONTROL
CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO P2109)
REMOVE FOREIGN OBJECT (CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY)
READ VALUE USING GTS (ISC LEARNING VALUE)
DTC P2109 Throttle / Pedal Position Sensor "A" Minimum Stop Performance
DESCRIPTION
The idling 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 idling speed is maintained at the target idling 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 with motor assembly |
- 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: 1) the mass air flow meter is normal; 2) atmospheric pressure is 85 kPa (638 mmHg) or higher; 3) the vehicle has been driven at a speed of 30 km/h (19 mph) or more at least once; and 4) the engine coolant temperature is 45°C (113°F) or less at engine start, the engine is warmed up and conditions for ISC learning are met, or the ignition switch has been turned to ON (including when the engine is running) for 1 hour or more, the engine is warmed up and conditions for ISC learning are met.
INSPECTION PROCEDURE
- HINT:
| 1.CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO P2109) |
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
| Result | Proceed to |
| Only 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.
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| A | |
| 2.CHECK FREEZE FRAME DATA |
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Using the GTS, check "ISC Learning Value" in the freeze frame data (Click here).
- HINT:
- Be sure to check "ISC Learning Value" in the freeze frame data as it is used when confirming whether the malfunction has been successfully repaired.
| NEXT | |
| 3.REMOVE FOREIGN OBJECT (CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY) |
Clean off any deposits from the inside of the throttle body with motor assembly.
| *1 | Bore |
| *2 | Valve |
| *a | Reference |
| *b | Throttle with Motor Body Assembly Cross-section Diagram |
| *c | When valve fully opened |
| *d | Deposits |
| *e | Do not directly apply cleaner |
Push open the throttle valve and wipe off any carbon from the valve and bore using a cloth soaked in non-residue solvent.
- CAUTION:
- Make sure that the cloth or your fingers do not get caught in the valve.
- NOTICE:
| NEXT | |
| 4.READ VALUE USING GTS (ISC LEARNING VALUE) |
Remove the EFI MAIN and ETCS fuses at the same time, wait 60 seconds or more, and then reinstall the fuses to reset the ISC learned value.
Start the engine and fully warm it up.
Leave the vehicle idling for 3 minutes or more and check that the engine speed is at the standard idling speed.
- HINT:
- Check the freeze frame data and make sure that the vehicle conditions are the same as when the DTC was stored.
Using the GTS, check "ISC Learning Value".
- OK:
- The value is half of "ISC Learning Value" recorded in the freeze frame data or less.
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| OK | ||
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