ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD (RF Turbo)]

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Guide Blade Actuator Operation Inspection

1.  Connect M-MDS to DLC-2.

2.  Start the engine and run it at idle.

3.  Access the VBCV PID.

4.  Verify that the guide blade actuator rod moves when the VBCV PID from 0 to 100 % using simulation function.

•  If the rod movement cannot be verified inspect for followings;

―  Guide blade actuator (See GUIDE BLADE ACTUATOR INSPECTION [MZR-CD (RF Turbo)].)

―  Vacuum hose connection between the vacuum chamber and the guide blade actuator through the VBC solenoid valve (See INTAKE-AIR SYSTEM VACUUM HOSE ROUTING DIAGRAM [MZR-CD (RF Turbo)].)

―  VBC solenoid valve (See VARIABLE BOOST CONTROL (VBC) SOLENOID VALVE INSPECTION [MZR-CD (RF Turbo)].)

Glow Plug Control Operation Inspection

1.  Verify that the battery is charged fully.

2.  If not, charge the battery.

3.  Connect the M-MDS to the DLC-2.

4.  Turn the engine switch to the ON position.

5.  Access and monitor the VPWR and GPC PIDs.

6.  Verify that the VPWR PID drops 0.3 V or more while the GPC is turned on from off using the simulation function.

•  If it cannot be verified, inspect the followings;

―  Glow plug relay

―  Glow plug

―  Wiring harness for battery positive post—glow plug relay—glow plug

―  Wiring harness for PCM terminal 37—glow plug relay—ground

Intake Shutter Valve Operation Inspection

1.  Connect the M-MDS to the DLC-2.

2.  Start the engine and run it at idle.

3.  Access and monitor the ETC_DSD, TP and MAP PIDs.

4.  Verify that the MAP PID increases and TP PID increases linearly, while increasing the opening angle of the intake shutter valve using the simulation function of ETC_DSD.

•  If both PIDs do not increase according to the intake shutter valve opening angle, inspect using the following steps.

1.  Remove the intake shutter valve with connector connected.

2.  Verify that the intake shutter valve opens and closes while it is operated using the simulation function of the ETC_DSD.

―  If not verified, retest after cleaning the intake shutter valve and inspecting related wiring harness and connectors.

3.  If the intake shutter valve does not operate, replace the intake shutter valve.

•  If the MAP PID increases but TP PID does not increase linearly according to the intake shutter valve opening angle inspect using the following steps.

1.  Inspect the intake shutter valve position sensor related wiring harness and connector.

2.  Remove the intake shutter valve with the connector connected.

3.  Verify that the TP PID increases and decreases linearly while the intake shutter valve is operated using the simulation function of ETC_DSD.

―  If the TP PID does not increase and decrease linearly, replace the intake shutter valve.

•  If the TP PID increases linearly but the MAP PID does not increase according to the intake shutter valve opening angle inspect using the following steps.

1.  Inspect air for leakage at the intake shutter valve and cylinder head.

2.  If normal, inspect and replace the MAP sensor.

EGR Valve Operation Inspection

1.  Crank the engine and verify that the EGR valve operation (initial operation) sound is heard.

•  If the operation sound is not heard, connect the M-MDS to the DLC-2 and verify that the DTC P0403 is shown. Perform the DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)

2.  Start the engine run it at idle.

3.  Access and monitor EGRP and MAP PIDs.

4.  Verify that the MAP PID increases while increase the opening value of the EGR valve from 0 % to 100 % using the EGRP PID of simulation function.

•  If both PIDs do not increase according to the EGR valve opening values, inspect using the following steps.

1.  Remove the EGR valve with the connector connected.

2.  Verify that the EGR valve opens and closes while it is operated using the simulation function of EGRP.

―  If not verified, retest after cleaning the EGR valve and inspecting the related harness and connectors.

3.  If the EGR valve does not operate, replace the EGR valve.

•  If the MAP PID increases but the EGRP PID does not increase linearly according to the EGR valve opening values, inspect using the following steps.

1.  Inspect the EGR valve position sensor related harness and connector.

2.  Remove the EGR valve with the connector connected.

3.  Verify that the EGRP PID increases and decreases linearly while increasing the EGR valve steps using simulation function of the EGRP.

―  If the EGRP PID does not increase and decrease linearly, replace the EGR valve.

•  If the EGRP PID increases linearly but MAP PID does not increase according to the EGR valve opening values, inspect using the following steps.

1.  Inspect for leakage between the exhaust manifold and surge tank.

2.  If normal, inspect and replace MAP sensor.

Fuel Injector Operation Inspection

1.  Connect the M-MDS to the DLC-2.

2.  Start the engine and warm it up to normal operating temperature.

3.  Perform the KOER self-test. (See KOEO/KOER SELF TEST [MZR-CD (RF Turbo)].)

4.  Verify that DTCs P0201, P0202, P0203 and/or P0204 are not shown using the KOER self-test.

•  If DTC P0201, P0202, P0203 and/or P0204 are shown, perform the DTC troubleshooting procedure. (See DTC TABLE [MZR-CD (RF Turbo)].)

5.  Verify that the engine speed drops or stalls when each cylinder fuel injector turns to off from on using the simulation function.

•  If it cannot be verified, inspect the following for the suspected cylinder;

―  Fuel injector (See FUEL INJECTOR INSPECTION [MZR-CD (RF Turbo)].)

―  Wiring harness for PCM—fuel injector

Cooling Fan Control System Operation Inspection

1.  Verify that the battery voltage is above 12.4 V.

•  If the battery voltage is below 12.4 V, charge the battery or connect the external power supply.

2.  Connect the M-MDS to the DLC-2.

3.  Access the following PIDs.

•  ECT

•  AC_REQ

4.  Turn the A/C switch to off.

5.  Verify that ECT PID is below 98 °C {209 °F} and the AC_REQ is off.

•  If the AC_REQ PID is on, inspect the A/C switch and A/C refrigerant pressure switch (high/low pressure).

6.  Verify that the cooling fan is not operating.

•  If the cooling fan is operating inspect the following:

(1)  Verify that the FAN DUTY PID is 0%.

•  If the FAN DUTY PID is 0%, inspect the following PID and related parts.

―  ECT (ECT sensor)

―  AC_REQ (A/C switch and A/C refrigerant pressure switch (high/low) pressure)

―  VSS (Vehicle speed sensor)

―  ACCS (A/C magnetic clutch)

•  If the FAN DUTY PID is 0%, replace cooling fan component.

7.  Turn the A/C switch to on.

8.  Verify that the cooling fan is operating while the ECT PID is below 98 °C {209 °F}.

•  If the cooling fan does not operate, inspect for the following:

―  A/C switch

―  A/C refrigerant pressure switch

―  Fan control module power supply circuit (open or short circuit)

―  Fan control module GND circuit (open or short circuit)

―  Fan control module control signal circuit (open or short circuit between fan control module terminal B and PCM terminal 25)

―  Fan control module (See COOLING FAN MOTOR COMPONENT INSPECTION [MZR-CD (RF Turbo)].)

9.  Turn the A/C switch to the off position.

10.  Start the engine and idle it.

11.  Verify that the cooling fan operating speed increases relative to the ECT PID increase.

•  If the cooling fan speed does not increase inspect the following:

―  ECT sensor (characteristic)

―  Fan control signal circuit (between fan control module terminal B and PCM terminal 25)

•  If the all items are normal, replace the cooling fan component.