Dtc P0234 Turbocharger / Supercharger Overboost Condition

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0234, P0299 AND/OR P1251)

CHECK CONNECTION OF VACUUM HOSE

CHECK VACUUM (TURBOCHARGER - VRV FOR TURBOCHARGER CONTROL)

INSPECT VRV FOR TURBOCHARGER CONTROL (VRV RESISTANCE)

CHECK WIRE HARNESS (VRV FOR TURBOCHARGER CONTROL - ECM)

INSPECT TURBOCHARGER SUB-ASSEMBLY

INSPECT EGR VALVE ASSEMBLY

READ VALUE OF MANIFOLD ABSOLUTE PRESSURE SENSOR

DTC P0234 Turbocharger / Supercharger Overboost Condition

DTC P0299 Turbocharger / Supercharger Underboost

DTC P1251 Turbocharger / Supercharger Overboost Condition (Too High)


DESCRIPTION


DTC No.
DTC Detection Condition
Trouble Area
P0234
P0299
P1251
When the turbocharger pressure exceeds the standard value for 0.5 seconds or more
(1 trip detection logic)
  1. VRV for turbocharger control
  2. Open or short in VRV circuit
  3. Turbocharger
  4. Vacuum hose
  5. EGR valve
  6. ECM
Actual turbocharger pressure is deviated 20 kPa (150 mmHg, 5.9 in.Hg) or more from the simulated target pressure for 60 seconds
(1 trip detection logic)

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Ftv.Система Ecd. Dtc P0234 Turbocharger / Supercharger Overboost Condition


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).
1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0234, P0299 AND/OR P1251)

  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 DTCs.

    Result:
    Display (DTC Output)
    		Proceed to
    P0234, P0299 and/or P1251
    		A
    P0234, P0299 and/or P1251 and other DTCs
    		B


B
GO TO DTC CHART
A


2.CHECK CONNECTION OF VACUUM HOSE
УКАЗАНИЕ:
Check the vacuum hoses of turbocharger system connections.


NG
REPAIR OR REPLACE VACUUM HOSE
OK


3.CHECK VACUUM (TURBOCHARGER - VRV FOR TURBOCHARGER CONTROL)

  1. Using a three-way connector, connect a vacuum gauge to the hose between the VRV and turbocharger.

  1. Warm up the engine coolant temperature to above 75°C (167°F).

  1. Check the vacuum at the engine speed of 900 rpm.

    Result:
    Vacuum
    		Proceed to
    0 kPa (0 mmHg, 0 in.Hg) to 50 kPa (375 mmHg, 14.8 in.Hg)
    		A
    Above 50 kPa (375 mmHg, 14.8 in.Hg)
    		B


B
Перейдите к шагу 6
A


4.INSPECT VRV FOR TURBOCHARGER CONTROL (VRV RESISTANCE)

  1. Measure the VRV resistance (see page RAV4_ACA30 RM000001A3V007X.html).

    Standard resistance:
    11.1 to 12.5 Ω


NG
REPLACE VRV FOR TURBOCHARGER CONTROL
OK


5.CHECK WIRE HARNESS (VRV FOR TURBOCHARGER CONTROL - ECM)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Ftv.Система Ecd. Dtc P0234 Turbocharger / Supercharger Overboost Condition

  1. Disconnect the B44 VRV connector.

  1. Disconnect the B32 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    B32-84 (VN) - B44-2
    		Below 1 Ω
    B32-84 (VN) or B44-2 - Body ground
    		10 kΩ or higher

  1. Reconnect the VRV connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


6.INSPECT TURBOCHARGER SUB-ASSEMBLY

  1. Check the turbocharger sub-assembly (see page RAV4_ACA30 RM0000022TO000X.html).



NG
REPLACE TURBOCHARGER SUB-ASSEMBLY
OK


7.INSPECT EGR VALVE ASSEMBLY

  1. Check the EGR valve assembly (see page RAV4_ACA30 RM000001A3V007X.html).



NG
REPLACE EGR VALVE ASSEMBLY
OK


8.READ VALUE OF MANIFOLD ABSOLUTE PRESSURE SENSOR

  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 / Data List / MAP and Atmosphere Pressure.

  1. Read the value.

    OK:
    Condition
    		MAP Value
    No pressure applied
    		Same as atmospheric pressure
    Vacuum applied
    		Becomes vacuum
    Pressure applied
    		Becomes pressurized


NG
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR
OK

REPLACE ECM