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.
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• If the rod movement cannot be verified inspect for followings;
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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. Switch the ignition to ON.
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.
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• If it cannot be verified, inspect the followings;
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― 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.
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• If both PIDs do not increase according to the intake shutter valve opening angle, inspect using the following steps.
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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.
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― 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.
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• 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.
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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.
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― If the TP PID does not increase and decrease linearly, replace the intake shutter valve.
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• 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.
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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.
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• If the operation sound is not heard, connect the M-MDS to the DLC-2 and verify that the DTC P0403:00 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.
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• If both PIDs do not increase according to the EGR valve opening values, inspect using the following steps.
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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.
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― 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.
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• 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.
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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.
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― If the EGRP PID does not increase and decrease linearly, replace the EGR valve.
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• If the EGRP PID increases linearly but MAP PID does not increase according to the EGR valve opening values, inspect using the following steps.
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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 P0201:00, P0202:00, P0203:00 and/or P0204:00 are not shown using the KOER self-test.
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5. Verify that the engine speed drops or stalls when each cylinder fuel injector turns to off from on using the simulation function.
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• If it cannot be verified, inspect the following for the suspected cylinder;
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― Wiring harness for PCM—fuel injector
Cooling Fan Control System Inspection
Cooling fan system operation
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Engine condition
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Cooling fan relay No.1
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Cooling fan relay No.2
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ECT below 100°C {212°F}
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OFF
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OFF
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ECT above 100°C {212°F}
(Until below 97°C {207°F})
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ON
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OFF
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ECT above 108°C {226°F}
(Until below 105°C {221°F})
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ON
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ON
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A/C and fan switches are ON
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ON
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ON
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ECT sensor malfunction
(PCM stores DTCs P0117:00 or P0118:00)
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ON
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ON
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1. Connect the M-MDS to the DLC-2.
2. Perform the KOEO or KOER self-test.(See KOEO/KOER SELF TEST [MZR-CD (RF Turbo)].)
3. Verify that the DTC P0117:00, P0118:00 are not displayed.
4. If the DTC P0117:00, P0118:00 is displayed, perform DTC inspection.(See DTC TABLE [MZR-CD (RF Turbo)].)
5. Verify that the ECT PID is below 100°C {212°F}.
6. Turn the A/C switch to off.
7. Switch the ignition to ON.
8. Verify that the cooling fan No.1 and cooling fan No.2 are not operating.
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• If the cooling fan No.1 and cooling fan No.2 operate, inspect the following:
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― Short to ground circuit between A/C refrigerant pressure switch and PCM terminal 32
• If the cooling fan No.1 operates and the cooling fan No.2 does not operate, inspect the following:
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― Short to power between cooling fan relay No.1 and cooling fan motor No.1
― Short to ground circuit between cooling fan relay No.1 and PCM terminal 27
― Cooling fan relay No.1 (stuck close)
• If the cooling fan No.1 does not operate and the cooling fan No.2 operates, inspect the following:
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― Short to power between cooling fan relay No.2 and cooling fan motor No.2
― Short to ground circuit between cooling fan relay No.2 and PCM terminal 28
― Cooling fan relay No.2 (stuck close)
9. Switch the ignition to off.
10. Disconnect the ECT sensor connector.
11. Switch the ignition to ON.
12. Verify that the cooling fan No.1 and cooling fan No.2 are operating.
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• If the cooling fan No.1 and cooling fan No.2 do not operates, inspect the following:
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― Open circuit in wiring from battery positive post to cooling fan relay No.1 and cooling fan relay No.2 (secondary power supply)
• If the cooling fan No.1 does not operates, inspect the following:
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― Open circuit between cooling fan relay No.1 and cooling fan motor No.1
― Open circuit between cooling fan relay No.1 and PCM terminal 27
― Open circuit between cooling fan motor No.1 and ground
― Cooling fan relay No.1 (stuck open)
• If the cooling fan No.2 does not operates, inspect the following:
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― Open circuit between cooling fan relay No.2 and cooling fan motor No.2
― Open circuit between cooling fan relay No.2 and PCM terminal 28
― Open circuit between cooling fan motor No.2 and ground
― Cooling fan relay No.2 (stuck open)
13. Clear the DTC P0118:00 from PCM memory using the M-MDS.(See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].)