DTC    P0236    Turbocharger / Supercharger Boost Sensor "A" Circuit Range / Performance

DTC    P0237    Turbocharger / Supercharger Boost Sensor "A" Circuit Low

DTC    P0238    Turbocharger / Supercharger Boost Sensor "A" Circuit High

for Preparation Click here


DESCRIPTION

A199024E01
The turbo pressure sensor detects the intake manifold pressure. The ECM determines the basic injection duration and injection advance timing based on the voltage output from the turbo pressure sensor.

P0236 
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine idles for 10 seconds or more
The turbo pressure sensor output differs from atmospheric pressure sensor output by more than threshold for 2 seconds or more.
(1 trip detection logic)
  1. Open or short in turbo pressure sensor circuit
  2. Turbo pressure sensor
  3. ECM

P0237 
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch is ON and 10 seconds elapsed
Short in turbo pressure sensor circuit for 5 seconds or more.
(1 trip detection logic)
  1. Short in turbo pressure sensor circuit
  2. Turbo pressure sensor
  3. ECM

P0238 
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch is ON and 5 seconds elapsed
Open in turbo pressure sensor circuit for 1.5 seconds or more.
(1 trip detection logic)
  1. Open in turbo pressure sensor circuit
  2. Turbo pressure sensor
  3. ECM

Related Data List 
DTC No.
Data List
P0236
  1. MAP
  2. Atmosphere Pressure
P0237
P0238

HINT:
When DTC P0236, P0237 and/or P0238 are stored, check the intake manifold pressure by entering the following menus on the intelligent tester: Powertrain / Engine and ECT / Data List / MAP.


Reference:

Intake Manifold Pressure
Malfunction
Approximately 0 kPa
  1. Short in PIM circuit
250 kPa (1875 mm Hg, 73.8 in. Hg) or higher
  1. Open or short in VC circuit
  2. Open in PIM circuit
  3. Open in E2 circuit


WIRING DIAGRAM


A198999E01


INSPECTION PROCEDURE

NOTICE:
When replacing the ECM, the ECM needs Registration and Initialization (Click here).

HINT:
  1. When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the intelligent tester. Then after installing the new ECM, perform all of the initializations/registrations for the "Learning Values Write" function by following the instructions shown on the tester display.
  2. Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

1.READ VALUE USING INTELLIGENT TESTER (MAP AND ATMOSPHERE PRESSURE)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / MAP and Atmosphere Pressure.

  1. Compare the values when the ignition switch is ON.

    Standard:
    Difference between the MAP and the Atmosphere Pressure is less than 7 kPa.

    HINT:
    Standard atmospheric pressure is 101 kPa. For every 100 m increase in altitude, pressure drops by 1 kPa. Varies by weather.



OK
Go to step 8

NG
Go to step 2

2.CHECK HARNESS AND CONNECTOR (TURBO PRESSURE SENSOR - ECM)

  1. Disconnect the turbo pressure sensor connector.



    A199023E01

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    A34-2 - A19-13 (PIM)
    		Always
    		Below 1 Ω
    A34-3 - A19-14 (VPIM)
    		Always
    		Below 1 Ω
    A34-1 - A19-15 (EPIM)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    A34-2 or A19-13 (PIM) - Body ground
    		Always
    		10 kΩ or higher
    A34-3 or A19-14 (VPIM) - Body ground
    		Always
    		10 kΩ or higher
    A34-1 or A19-15 (EPIM) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Turbo Pressure Sensor)
    *2
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the turbo pressure sensor connector.

  1. Reconnect the ECM connector.



NG
Go to step 7
OK


3.CHECK ECM TERMINAL VOLTAGE (VC TERMINAL)


    A200310E01

  1. Disconnect the turbo pressure sensor connector.

  1. Turn the ignition switch to ON.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A34-3 (VC) - A34-1 (E)
    		Ignition switch ON
    		4.5 to 5.5 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Turbo Pressure Sensor)

  1. Reconnect the turbo pressure sensor connector.



NG
Go to step 6
OK


4.REPLACE TURBO PRESSURE SENSOR

  1. Replace the turbo pressure sensor (Click here).


NEXT


5.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear the DTCs (Click here).

  1. Start the engine.

  1. Allow the engine to idle for 10 seconds or more.

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

  1. Read the DTCs.
    Result 
    Result
    		Proceed to
    DTC P0236, P0237 and/or P0238
    		A
    No DTC output
    		B



B
END
A


6.REPLACE ECM

  1. Replace the ECM (Click here).



NEXT
Go to step 8

7.REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT


8.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear the DTCs (Click here).

  1. Start the engine.

  1. Allow the engine to idle for 10 seconds or more.

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

  1. Confirm that the DTC is not output again.


NEXT

END