Dtc P0488 Exhaust Gas Recirculation Throttle Position Control Range / Performance

Двигатель. Toyota Rav4. Aca30, 33, 38 Ala30
Система Управления Двигателем 2Ad-Ftv. Toyota Rav4. Aca30, 33, 38 Ala30

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0488)

CHECK IF DTC OUTPUT RECURS

CHECK WIRE HARNESS (DIESEL THROTTLE CONTROL MOTOR - ECM)

REPLACE DIESEL THROTTLE BODY ASSEMBLY (THROTTLE CONTROL MOTOR)

CHECK WHETHER DTC OUTPUT RECURS

DTC P0488 Exhaust Gas Recirculation Throttle Position Control Range / Performance


DESCRIPTION

The ECM opens and closes the throttle valve using a rotary solenoid type actuator. Due to opening and closing the valve, the exhaust gas recirculation volume can be properly controlled. Also, engine vibration and noise will be reduced by closing the valve when the engine is stopped.

DTC No.
DTC Detection Condition
Trouble Area
P0488
When either condition below is met:
  1. When throttle valve remains closed despite ECM's signal to open valve
    (1 trip detection logic)
  2. When throttle valve remains open despite ECM's signal to close valve
    (1 trip detection logic)
  1. Throttle valve stuck
  2. Throttle valve does not move smoothly
  3. Open or short in throttle valve circuit
  4. Open or short in throttle valve position sensor circuit
  5. Throttle position sensor (built in diesel throttle body assembly)
  6. ECM

УКАЗАНИЕ:
After confirming DTC P0488, check the throttle position.

Reference:
Condition
Throttle Valve Position
Moment when accelerator pedal is further depressed or released at 3,000 rpm
Opening angle varies smoothly

MONITOR DESCRIPTION

The ECM opens and closes the throttle valve by adjusting the current flowing to the rotary solenoid with a duty ratio. If the throttle valve does not move smoothly or is stuck, the duty ratio used during valve movement control increases or decreases greatly, and the ECM will determine that the throttle valve is malfunctioning and the ECM illuminates the MIL.

Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Ftv.Система Ecd. Dtc P0488 Exhaust Gas Recirculation Throttle Position Control Range / Performance


WIRING DIAGRAM

Refer to DTC P0120 (see page RAV4_ACA30 RM00000187N006X_03.html).

INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:
After replacing the ECM, the new ECM needs registration (see page RAV4_ACA30 RM000000TJ400AX.html) and initialization (see page RAV4_ACA30 RM000000TIN009X.html).
УКАЗАНИЕ:
After warming up the engine, DTC P0488 can be set if 1 second or more passes after quickly accelerating the engine from idling.
1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0488)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result:
    Display (DTC Output)
    		Proceed to
    P0488
    		A
    P0488 and P0120, P0122 and/or P0123
    		B
    УКАЗАНИЕ:
    If codes other than P0488 are output, perform troubleshooting for those DTCs first.


B
GO TO DTC CHART
A


2.CHECK IF DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC / Clear.

  1. Clear the DTCs (see page RAV4_ACA30 RM000000PDK01GX.html).

  1. Start the engine and accelerate the engine from idle to 3,000 rpm 3 times quickly.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result:
    Display (DTC Output)
    		Proceed to
    P0488
    		A
    No output
    		B
    УКАЗАНИЕ:
    The normal operation of the throttle valve is as follows.
    Reference:
    Condition
    		Throttle Valve Position
    Moment when accelerator pedal is further depressed or released at 3,000 rpm
    		Opening angle varies smoothly


B
CHECK FOR INTERMITTENT PROBLEMS
A


3.CHECK WIRE HARNESS (DIESEL THROTTLE CONTROL MOTOR - ECM)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Ftv.Система Ecd. Dtc P0488 Exhaust Gas Recirculation Throttle Position Control Range / Performance

  1. Disconnect the B33 throttle control motor connector.

  1. Disconnect the B32 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    B33-1 (RSO) - B32-86 (LUSL)
    		Below 1 Ω
    B33-1 (RSO) or B32-86 (LUSL) - Body ground
    		10 kΩ or higher

  1. Reconnect the throttle control motor connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


4.REPLACE DIESEL THROTTLE BODY ASSEMBLY (THROTTLE CONTROL MOTOR)

  1. Replace the throttle body assembly (see page RAV4_ACA30 RM000001BMH005X.html).


NEXT


5.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

  1. Clear DTCs (see page RAV4_ACA30 RM000000PDK01GX.html).

  1. Start the engine and drive the vehicle for approximately 15 minutes.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result:
    Display (DTC Output)
    		Proceed to
    P0488
    		A
    No output
    		B


B
SYSTEM IS OK
A

REPLACE ECM