ECD SYSTEM, Diagnostic DTC:33(1), 33(2)

DTC Code DTC Name
33(1) Exhaust Gas Control System Malfunction
33(2) Exhaust Gas Control System Malfunction

DESCRIPTION

DTC No. 33 (1):

The ECM fully closes the exhaust control valve via the VSV when the warm up switch is ON. This makes it possible to increase the engine load and then maintain the high temperature of the exhaust gas. As a result, the engine water temperature increases.

Outer temperature, water temperature, the number of engine revolution and injection volume while the engine is running, are the conditions to fully close the valve. The valve, however, will once fully close then fully open, regardless of any conditions whenever the ignition switch is turned OFF and the vehicle's speed is 0 km/h.

If the valve becomes unable to operate, owing to being stuck or other factors, while the valve is fully closed, the ECM will output DTC No. 33 (1) by detecting a signal from the turbo pressure. At this time, the engine check lamp starts blinking.

DTC No. 33 (2):

When the warm up switch is ON, the exhaust control valve is close the pressure goes up too high, because a foreign object is stuck or for other reasons, the ECM detects it and forces the exhaust control valve to fully open. At this time, DTC No. 33 (2) is output but the engine check lamp does not blink.

DTC No. DTC Detecting Condition Trouble Area
33(1) Exhaust control valve fully closed can not be operate

  • Exhaust gas control valve

  • Open or short in VSV for exhaust control valve

  • Turbo pressure

  • Turbocharger

  • EGR valve

  • ECM
33(2)

Exhaust control valve does not fully closed

(Clearance is clogged)

  • Exhaust gas control valve

  • Air flow meter

  • EGR valve

  • ECM

WIRING DIAGRAM

A01KEK5E01

INSPECTION PROCEDURE

Tech Tips


  • Read freeze frame data using intelligent tester. Because freeze frame records the engine conditions when the malfunction is detected. When troubleshooting it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

  • When not using the intelligent tester go to step 12.

PROCEDURE


  1. CHECK EXHAUST GAS CONTROL VALVE ASSEMBLY


    1. Check the exhaust control valve operation Click here .


    NG

    REPAIR OR REPLACE EXHAUST GAS CONTROL VALVE ASSEMBLY

    OK

  2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (CHECK EXHAUST GAS CONTROL VALVE ASSEMBLY)


    OK

    CHECK CONNECTION OF HOSE (VACUUM HOSE TO TURBO PRESSURE SENSOR) Click here

    NG

  3. CHECK CONNECTION OF HOSE (TO VACUUM SWITCHING VALVE)


    NG

    REPAIR OR REPLACE VACUUM HOSE

    OK

  4. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (VACUUM SWITCHING VALVE)

    A01KGNZE01
    Text in Illustration
    *1 Vacuum Gauge

    1. Using a 3-way connector, connect a vacuum gauge to the hose between the VSV and exhaust control valve.

    2. Warm up the engine to above 80°C (176°F).

    3. Engine at idling

    4. Connect the intelligent tester to the DLC3.

    5. Turn the ignition switch ON and the push the intelligent tester main switch is ON.

    6. Select the ACTIVE TEST mode on the intelligent tester.

    7. Check the vacuum when VSV is operated by intelligent tester.

      Result
      VSV Vacuum
      ON 0 kPa (0 mmHg, 0 in. Hg)
      OFF Above 28 kPa (210 mmHg, 8.3 in. Hg)

    OK

    CHECK CONNECTION OF HOSE (AIR INLET HOSE FROM TURBOCHARGER) Click here

    NG

  5. CHECK ECM (CHECK VOLTAGE)


    1. A01KELVE09

      Turn the ignition switch ON.

    2. Check the voltage between terminals of the ECM connector as shown in the table and illustration.

      Voltage

      Terminal

      (Positive terminal ←→ Negative terminal)

      		 Voltage
      HEXF (E9-7) ←→ E1 (E7-22) 4.5 - 5.5 V

    NG

    CHECK AND REPLACE ECM Click here

    OK

  6. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (VACUUM SWITCHING VALVE)


    1. A01KEXFE01
      Text in Illustration
      *1 Air Filter
      *a Air
      *b VSV: ON
      *c VSV: OFF

      Disconnect the vacuum hoses from the VSV.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch ON and push the intelligent tester main switch ON.

    4. Select the ACTIVE TEST mode on the intelligent tester.

    5. Check the operation of the VSV when it is operated by the intelligent tester.

      Result
      VSV is ON
      Air from port E flows out through port F.
      VSV is OFF
      Air from port E flows out through air filter.

    OK

    CHECK AND REPLACE EXHAUST GAS CONTROL VALVE ASSEMBLY

    NG

  7. INSPECT VACUUM SWITCHING VALVE


    1. A01KHLSE01
      Text in Illustration
      *1 Ohmmeter

      Inspect the VSV for open circuit.


      1. Using an ohmmeter, measure the resistance between terminals as shown.

        Resistance
        33 - 39 Ω at 20°C (68°F)
    2. A01KEP1E01
      Text in Illustration
      *1 Ohmmeter
      *a No Continuity

      Inspect the VSV for ground.


      1. Using an ohmmeter, check that there is no continuity between terminals and VSV body.

    3. A01KECGE01
      Text in Illustration
      *a Vacuum

      Inspect the VSV for air tightness.


      1. Check that when vacuum is applied to the vacuum outlet port shown, the needle of vacuum pump indicates an increase of 66.7 kPa (500 mmHg, 19.7 in. Hg) or more.

    4. A01KHLHE01
      Text in Illustration
      *a 6 V
      *b Vacuum

      Inspect the VSV operation.


      1. Apply about 6 V of DC power to the terminals.

      2. Check that when vacuum is applied to the vacuum outlet port shown, the need does not move.


    NG

    REPLACE VACUUM SWITCHING VALVE

    OK

  8. CHECK WIRE HARNESS (ECM - VSV) (a) (VSV - EFI MAIN RELAY (MARKING EFI)) (b)


    1. A01KIDKE01

      Check for open and short in harness and connector between ECM and VSV.


      1. Disconnect the VSV connector.

      2. Disconnect the ECM (E9) connector.

      3. Check the continuity between the terminals VSV and ECM connector as shown in the illustration and table.

        Continuity (Check for open)

        Terminal

        (VSV ←→ ECM)

        		 Standard
        2 ←→ HEXF (E9-7) Continuity
        Continuity (Check for short)

        Terminal

        (ECM ←→ ECM(Ground))

        		 Standard
        HEXF (E9-2) ←→ E1 (E7-22) No continuity
    2. A01KEMXE01

      Check for open and short in harness and connector between the VSV and EFI main relay.


      1. Remove the EFI main relay.

      2. Disconnect the engine VSV connector.

      3. Check the continuity between the terminals VSV and EFI main relay of R/B No. 2 (3) as shown in the illustration and table.

        Standard (Check for open)

        Terminal

        (EFI main relay of R/B No. 2 ←→ VSV)

        		 Standard
        3 ←→ 1 Continuity

      4. Check the continuity between the terminals VSV and body ground as shown in the illustration and table.

        Standard (Check for short)

        Terminal

        (VSV ←→ Ground)

        		 Standard
        1 ←→ Body ground No continuity

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  9. CHECK EXHAUST GAS CONTROL VALVE ASSEMBLY


    1. Check that no foreign object exists in the exhaust control valve.


    NG

    REPAIR OR REPLACE EXHAUST GAS CONTROL VALVE ASSEMBLY

    OK

  10. CHECK CONNECTION OF HOSE (AIR INLET HOSE FROM TURBOCHARGER)


    NG

    REPAIR OR REPLACE AIR HOSE

    OK

  11. CHECK CONNECTION OF HOSE (VACUUM HOSE TO TURBO PRESSURE SENSOR)


    NG

    REPAIR OR REPLACE VACUUM HOSE

    OK

    CHECK AND REPLACE ECM Click here

  12. CHECK EXHAUST GAS CONTROL VALVE ASSEMBLY


    1. Check the exhaust control valve operation Click here.


    NG

    REPAIR OR REPLACE EXHAUST GAS CONTROL VALVE ASSEMBLY

    OK

  13. CHECK CONNECTION OF HOSE (TO VACUUM SWITCHING VALVE)


    NG

    REPAIR OR REPLACE VACUUM HOSE

    OK

  14. CHECK VACUUM

    A01KGNZE01
    Text in Illustration
    *1 Vacuum Gauge

    1. Using a 3-way connector, connect a vacuum gauge to the hose between the VSV and exhaust control valve.

    2. Warm up the engine to above 80°C (176°F).

    3. Engine at idling.

    4. EGR system is ON.

      Result
      Warm up switch Vacuum
      ON 0 kPa (0 mmHg, 0 in. Hg)
      OFF Above 28 kPa (210 mmHg, 8.3 in. Hg)

    OK

    CHECK CONNECTION OF HOSE (VACUUM HOSE TO TURBO PRESSURE SENSOR) Click here

    NG

  15. CHECK ECM (CHECK VOLTAGE)


    1. A01KELVE09

      Turn the ignition switch ON.

    2. Check the voltage between terminals of the ECM connector as shown in the table and illustration.

      Voltage

      Terminal

      (Positive terminal ←→ Negative terminal)

      		 Voltage
      HEXF (E9-7) ←→ E1 (E7-22) 4.5 - 5.5 V

    NG

    CHECK AND REPLACE ECM Click here

    OK

  16. CHECK VACUUM SWITCHING VALVE (CHECK FUNCTION)


    1. A01KHTFE01
      Text in Illustration
      *1 Air Filter
      *a Air
      *b VSV: ON
      *c VSV: OFF

      Disconnect the (E9) connector from the ECM.

    2. Turn the ignition switch ON.

    3. Check the VSV operation.


      1. Connect between terminal HEXF and E1 of the ECM (E9) and (E7) connector (ON).

      2. Disconnect between terminal HEXF and E1 of the ECM (E9) and (E7) connector (OFF).

      VSV ON
      Air from port E flows out through port F.
      VSV OFF
      Air from port E flows out through air filter.

    OK

    CHECK AND REPLACE EXHAUST GAS CONTROL VALVE ASSEMBLY

    NG

  17. INSPECT VACUUM SWITCHING VALVE


    1. A01KHLSE01
      Text in Illustration
      *1 Ohmmeter

      Inspect the VSV for open circuit.


      1. Using an ohmmeter, measure the resistance between terminals as shown.

        Resistance
        33 - 39 Ω at 20°C (68°F)
    2. A01KEP1E01
      Text in Illustration
      *1 Ohmmeter
      *a No Continuity

      Inspect the VSV for ground.


      1. Using an ohmmeter, check that there is no continuity between terminals and VSV body.

    3. A01KECGE01
      Text in Illustration
      *a Vacuum

      Inspect the VSV for air tightness.


      1. Check that when vacuum is applied to the vacuum outlet port shown, the needle of vacuum pump indicates an increase of 66.7 kPa (500 mmHg, 19.7 in. Hg) or more.

    4. A01KHLHE01
      Text in Illustration
      *a 6 V
      *b Vacuum

      Inspect the VSV operation.


      1. Apply about 6 V of DC power to the terminals.

      2. Check that when vacuum is applied to the vacuum outlet port shown, the need does not move.


    NG

    REPLACE VACUUM SWITCHING VALVE

    OK

  18. CHECK WIRE HARNESS (ECM - VSV) (a) (VSV - EFI MAIN RELAY (MARKING EFI)) (b)


    1. A01KIDKE01

      Check for open and short in harness and connector between ECM and VSV.


      1. Disconnect the VSV connector.

      2. Disconnect the ECM (E9) connector.

      3. Check the continuity between the terminals VSV and ECM connector as shown in the illustration and table.

        Continuity (Check for open)

        Terminal

        (VSV ←→ ECM)

        		 Standard
        2 ←→ HEXF (E9-7) Continuity
        Continuity (Check for short)

        Terminal

        (ECM ←→ ECM(Ground))

        		 Standard
        HEXF (E9-2) ←→ E1 (E7-22) No continuity
    2. A01KEMXE01

      Check for open and short in harness and connector between the VSV and EFI main relay.


      1. Remove the EFI main relay.

      2. Disconnect the engine VSV connector.

      3. Check the continuity between the terminals VSV and EFI main relay of R/B No. 2 (3) as shown in the illustration and table.

        Standard (Check for open)

        Terminal

        (EFI main relay of R/B No. 2 ←→ VSV)

        		 Standard
        3 ←→ 1 Continuity

      4. Check the continuity between the terminals VSV and body ground as shown in the illustration and table.

        Standard (Check for short)

        Terminal

        (VSV ←→ Ground)

        		 Standard
        1 ←→ Body ground No continuity

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  19. CHECK EXHAUST GAS CONTROL VALVE ASSEMBLY


    1. Check that no foreign object exists in the exhaust control valve Click here.


    NG

    REPAIR OR REPLACE EXHAUST GAS CONTROL VALVE ASSEMBLY

    OK

  20. CHECK CONNECTION OF HOSE (AIR INLET HOSE FROM TURBOCHARGER)


    NG

    REPAIR OR REPLACE AIR HOSE

    OK

  21. CHECK CONNECTION OF HOSE (VACUUM HOSE TO TURBO PRESSURE SENSOR)


    NG

    REPAIR OR REPLACE VACUUM HOSE

    OK

    CHECK AND REPLACE ECM Click here