Variable Tumble Control Operation Inspection
- Connect the M-MDS to the DLC-2.
- Access ECT1 and ECT2 PIDs.
- Verify that ECT1 and ECT2 PIDs are less than 60 °C {140 °F} (LF)/63 °C {145 °F} (L5).
- Start the engine.
- Inspect rod operation under the following conditions:
Rod operation
ROD OPERATION CONDITIONS
| Engine speed | 3,750 RPM | |
|---|---|---|
| Below | Above | |
| Shutter valve actuator | Operate | Not operate |
- If the rod operation is not specified, inspect as follows:
- Verify that DTC P2009:00 or P2010:00 is not displayed.
- If DTC No. P2009:00 or P2010:00 are shown, perform DTC inspection. (See DTC P2009:00 .) (See DTC P2010:00 .)
- Inspect the variable tumble solenoid valve. (See
VARIABLE TUMBLE SOLENOID VALVE INSPECTION
.)
- If the variable tumble solenoid valve is not normal, replace the variable tumble solenoid valve. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
- If the variable tumble solenoid valve is normal, inspect the following:
- Vacuum hose and vacuum chamber for looseness or damage
- Shutter valve actuator (See VARIABLE INTAKE AIR SHUTTER VALVE ACTUATOR INSPECTION .)
- Shutter valve stuck open or closed
Fuel Injector Operation Inspection
If simulation function of M-MDS is used:
FUEL INJECTOR OPERATION INSPECTION CHART
| STEP | INSPECTION | RESULTS | ACTION |
|---|---|---|---|
| 1 | Start the engine and warm it up until normal operating temperature. Connect the M-MDS to DLC-2. Access the INJ#1, INJ#2, INJ#3 and INJ#4 PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .) Turn the fuel injector from on to off using the PIDs each cylinder. Does the engine speed drop? |
Yes | Fuel injector work properly. |
| No | Go to the next step. | ||
| 2 | Disconnect the fuel injector that the engine speed does not drop at Step 1. Switch the ignition to ON. Measure the voltage between suspect fuel injector terminal A (wiring harness-side) and body ground. Is the voltage B+ ? |
Yes | Go to the next step. |
| No | Repair or replace for a possible open or short circuit. | ||
| 3 | Inspect for open or short circuit in wiring harness between suspect fuel injector terminal B and following PCM terminals:
|
Yes | Repair or replace for a possible open or short circuit. |
| No | Go to the next step. | ||
| 4 | Inspect suspect fuel injector. (See FUEL INJECTOR INSPECTION .) Is there any malfunction? |
Yes | Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION .) |
| No | Replace the PCM. (See PCM REMOVAL/INSTALLATION .) |
If simulation function of M-MDS used:
FUEL INJECTOR OPERATION INSPECTION CHART
| STEP | INSPECTION | RESULTS | ACTION |
|---|---|---|---|
| 1 | While cranking engine, inspect for fuel injector operation sound at each cylinder using a soundscope. Is operation sound heard? |
Yes | Fuel injector work properly. |
| No | Go to the next step. | ||
| 2 | Disconnect the fuel injector that the engine speed does not drop at Step 1. Switch the ignition to ON. Measure the voltage between suspect fuel injector terminal A (wiring harness-side) and body ground. Is the voltage B+ ? |
Yes | Go to the next step. |
| No | Repair or replace for a possible open or short circuit. | ||
| 3 | Inspect for open or short circuit in wiring harness between suspect fuel injector terminal B and following PCM terminals:
|
Yes | Repair or replace for a possible open or short circuit. |
| No | Go to the next step. | ||
| 4 | Inspect suspect fuel injector. (See FUEL INJECTOR INSPECTION .) Is there any malfunction? |
Yes | Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION .) |
| No | Replace the PCM. (See PCM REMOVAL/INSTALLATION .) |