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

BME010300000W62

Intake Shutter Valve Operation Inspection

1. Start the engine and warm up completely.

2. Turn off the A/C switch.

3. Connect the WDS or equivalent to the DLC-2.

4. Monitor the following PIDs using the WDS or equivalent.

- If not as specified, inspect each sensor and related harness.
ECT PID
Above 60 °C {140 °F}
MAF PID

1.7-1.9 V

RPM PID

725-825 rpm

Note
• The position of the shutter valve, VSC shutter valve and EGR valve may not be as specified when idle speed is maintained for several minutes. If this occurs, briefly increase engine speed to 1,500 rpm and then re-check the position at idle speed.

5. Increase the engine speed and inspect that the intake shutter valve position changes as specified.

• If not as specified, inspect the following.
- Vacuum hose
- Intake shutter solenoid valve actuator
- Intake shutter solenoid valve and related harness.

Specification

Engine speed (rpm)

Intake shutter valve position

775
Halfway open
1,800
Fully open
2,500
Fully open
Above 3,400
Fully open

Guide Blade Actuator Operation Inspection

1. Start the engine and warm up completely.

2. Verify that the A/C switch is off.

3. Connect the WDS or equivalent to the DLC-2.

4. Monitor the following PIDs using the WDS or equivalent.

- If not as specified, inspect each sensor and related harness.
ECT PID
Above 60 °C {140 °F}
MAF PID

1.7-1.9 V

RPM PID

725-825 rpm

ACSW PID

OFF

5. Inspect that the guide blade actuator position changes as specified.

• If not as specified, inspect the following.
- Vacuum hose
- Guide blade actuator
- VBC solenoid valve and related harness.

Specification

Engine switch position

Engine speed (rpm)

Guide blade actuator position

ON
775
Closed
OFF*1
0*3
Closed
OFF*2
0
Open

*1 : :
Just after turning engine switch off
*2 : :
0 to 5 seconds after turning engine switch to OFF
*3 : :
Guide blade actuator begins to pull back

Main Fan/Additional Fan Motor Operation Inspection

1. Verify that the engine is cold.

2. Connect the WDS or equivalent to the DLC-2.

3. Turn the engine switch to ON.

4. Turn the A/C switch off.

5. Verify that the main fan/additional fan are not operating.

• If main fan/additional fan are operated, verify FAN_DUTY PID using the WDS or equivalent.
- If FAN_DUTY PID is not 0%, inspect following PIDs.
• ECT (voltage)
• ACSW
- If FAN_DUTY PID is 0%, inspect the following.
• Fan control module
• Open/short to GND circuit between fan control module and PCM
Note
• The main fan and additional fan do not rotate when FAN_DUTY PID is lower than 30% by fan motor internal friction.

6. Verify that both main fan and additional fan operation speed increases in accordance with FAN_DUTY PID changes.

• If there is a problem, perform the following steps.
(1) Verify clicking sound of fan relay when turning the engine switch from OFF to ON.
• If there is no clicking sound, inspect the following.
- Fan relay
- Open circuit between main relay and fan relay
• If clicking sound is heard, go to next step.
(2) Inspect following parts in order, and in accordance with fan operating condition.
• Both main fan and additional fan do not operate.
- Open circuit between fan control module and fan relay
- Open circuit in fan control module GND harness
- Poor connection of fan control module connector
- Fan control module
• Only main fan does not operate.
- Open/short to GND circuit between fan control module and main fan motor
- Poor connection of fan control module connector and/or main fan motor connector
- Main fan motor malfunction
- Fan control module
• Only additional fan does not operate.
- Open/short to GND circuit between fan control module and additional fan motor
- Poor connection of fan control module connector and/or additional fan motor connector
- Additional fan motor malfunction
- Fan control module