ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2]
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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 PCM PIDs VBCV and VBC_POS.
4. Command the VBCV PID from 0 to 100 % using active command mode function.
5. Verify that the VBC_POS PID reading change according to VBCV commanded value.
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 PCM PIDs VPWR and GPC.
6. Verify that the VPWR PID drops 0.3 V or more while the GPC is turned on from off using the active command mode function.
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 PCM PIDs ETC_DSD, TP and MAP.
4. Verify that the MAP PID increases and TP PID increases linearly, while increasing the opening angle of the intake shutter valve using the active command mode function of ETC_DSD.
Brake override system operation inspection (From GH1***-442043, GH10**-210449)
1. Start the engine and run it is idling.
2. Verify that the engine speed becomes approx. 1,200 rpm under the following conditions.
EGR Valve Operation Inspection
1. Crank the engine and verify that the EGR valve operation (initial operation) sound is heard.
2. Start the engine run it at idle.
3. Access and monitor the PCM PIDs EGRP and MAP.
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 active command mode function.
EGR Cooler Bypass Valve Operation Inspection
1. Connect the M-MDS to DLC-2.
2. Retrieve the DTC.
3. Verify that the DTC P245C:00, P245D:00 are not displayed.
4. Disconnect the vacuum hose at EGR cooler bypass valve actuator.
5. Access the PCM PID EGR_C_BP.
6. Start the engine and run it at idle.
7. Verify that the vacuum condition is following table while the PID EGR_C_BP is ON and OFF using the active command mode function.
EGR_C_BP PID |
ON |
OFF |
---|---|---|
Vacuum
|
Applied
|
Not applied
|
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 2.2].)
4. Verify that DTCs P0201:00, P0202:00, P0203:00 and/or P0204:00 are not shown using the KOER self-test.
5. Verify that the engine speed drops or stalls when each cylinder fuel injector turns to off from on using the M-MDS active command mode function.
Cooling Fan Control System Inspection
1. Connect the M-MDS to the DLC-2.
2. Perform the KOEO or KOER self test and verify that DTCs P0117:00 and/or P0118:00 are not shown using the KOEO and/or KOER self test. (See KOEO/KOER SELF TEST [MZR-CD 2.2].)
3. Start the engine and let it at idle with ECT is below 97 °C {207 °F}.
4. Verify that the cooling fans are not operating when A/C switch and fan switch are turned off.
Cooling fan status |
Inspection item |
|
---|---|---|
Cooling fan No.1 |
Cooling fan No.2 |
|
Low
|
Stop
|
• Cooling fan relay No.1 (Stuck close)
• Wiring harness in cooling fan relay No.1—cooling fan No.1 (Short to power supply circuit)
|
Stop
|
Low
|
• Cooling fan relay No.4 (Stuck close)
• Wiring harness in cooling fan relay No.4—cooling fan No.1 (Short to power supply circuit)
|
Low
|
Low
|
• Wiring harness between refrigerant pressure switch (low, high) and PCM terminal 1AF (Short to ground) (PCM PID AC_REQ is always ON)
|
High
|
Middle
|
• Wiring harness between refrigerant pressure switch (low, high) and PCM terminal 1AF (Short to ground) (PCM PID AC_REQ is always ON)
|
5. Using the M-MDS simulation function, turn FAN1 and FAN3 from the off position to the ON position, and verify that cooling fans No.1 and No.2 operate at low speed.
Cooling fan status |
Inspection item |
|
---|---|---|
Cooling fan No.1 |
Cooling fan No.2 |
|
Stop
|
Low
|
• Cooling fan relay No.1 (Stuck open)
• Wiring harness in battery—cooling fan relay No.1—cooling fan No.1 (Open circuit, Fuse is melt by short to ground)
• Wiring harness in cooling fan No.1—body ground (Open circuit)
• Cooling fan No.1 (Internal circuit open)
|
Low
|
Stop
|
• Cooling fan relay No.4 (Stuck open)
• Wiring harness in battery—cooling fan relay No.4—cooling fan No.2 (Open circuit, Fuse is melt by short to ground)
• Wiring harness in cooling fan No.2—body ground (Open circuit)
• Cooling fan No.2 (Internal circuit open)
|
Middle
|
Middle
|
• Cooling fan relay No.2 (Stuck close)
• Wiring harness in cooling fan relay No.2—cooling fan No.1 (Short to ground)
• Wiring harness in cooling fan relay No.2—cooling fan No.2 (Short to ground)
• Cooling fan relay No.3 (Stuck close)
• Wiring harness in cooling fan relay No.3—cooling fan No.1 (Short to power supply circuit)
• Wiring harness in cooling fan relay No.3—cooling fan No.2 (Short to power supply circuit)
|
6. Using the M-MDS simulation function, turn FAN1 and FAN2 from the off position to the ON position, and verify that cooling fan No.1 operates at high speed and cooling fan No.2 operates at middle speed.
Cooling fan status |
Inspection item |
|
---|---|---|
Cooling fan No.1 |
Cooling fan No.2 |
|
High
|
Stop
|
• Wiring harness in cooling fan relay No.3—cooling fan No.2 (Open circuit)
• Cooling fan No.2 (Internal circuit open)
|
Low
|
Stop
|
• Cooling fan relay No.3 (Stuck open)
• Wiring harness in battery—cooling fan relay No.3—branch point between cooling fans No.1 and No.2 (Open circuit, Fuse is melt by short to ground)
• Wiring harness in cooling fan relay No.3—cooling fan No.1 (Fuse is melt by short to ground)
• Wiring harness in cooling fan relay No.3—cooling fan No.2 (Fuse is melt by short to ground)
|
Middle
|
Low
|
• Cooling fan relay No.2 (Stuck open)
• Wiring harness in cooling fan No.2—body ground (Open circuit)
|
High
|
Low
|
• Wiring harness in cooling fan No.2—cooling fan relay No.2 (Open circuit)
• Cooling fan No.2 (Internal circuit open)
|
Middle
|
Middle
|
• Wiring harness in cooling fan No.1—cooling fan relay No.2 (Open circuit)
• Cooling fan No.1 (Internal circuit open)
|
7. Using the M-MDS simulation function, turn FAN1, FAN2, and FAN3 from the off position to the ON position, and verify that cooling fans No.1 and No.2 operate at high speed.
Cooling fan status |
Inspection item |
|
---|---|---|
Cooling fan No.1 |
Cooling fan No.2 |
|
High
|
Middle/Low
|
• Cooling fan No.2 (Internal circuit open)
|
A/C Cut-off Control System Inspection
1. Start the engine.
2. Turn the A/C switch and the fan switch on.
3. Verify that the A/C compressor magnetic clutch actuates.
4. Fully open the throttle valve and verify that the A/C compressor magnetic clutch does not actuate for 2—5 s.