CAUTION
- Prior to starting work, pay special attention to the following: Always wear work clothes, a safety cap, protective shoes. Additionally, wear a helmet, protective goggles, etc. if necessary. Protect the vehicle using a seat cover, fender cover, etc. Prepare the service tools, clean cloth, containers to catch grease and oil, etc.
- Place "NO OPEN FLAMES" signs near the working area.
- Prepare a container and cloth to prevent scattering of fuels when performing work where fuels can be spilled. If the oil spills, wipe it off immediately to prevent from penetrating into floor or flowing out for environmental protection.
- Vehicle components are extremely hot immediately after driving. Be wary of receiving burns from heated parts.
- When performing a repair, identify the cause of trouble and avoid unnecessary removal, disassembly and replacement.
- Before disconnecting connectors of sensors or units, be sure to disconnect the ground cable from battery.
- Always use the jack-up point when the shop jacks or rigid racks are used to support the vehicle.
- Remove contamination including dirt and corrosion before removal, installation, disassembly or assembly.
- Keep the removed parts in order and protect them from dust and dirt.
- All removed parts, if to be reused, should be reinstalled in the original positions with attention to the correct directions, etc.
- Bolts, nuts and washers should be replaced with new parts as required.
- Follow all government and local regulations concerning disposal of refuse when disposing fuel.
GENERAL TOOL
| TOOL NAME | REMARKS |
|---|
| Circuit tester | Used for measuring resistance and voltage. |
| Oscilloscope | Used for inspecting the waveform of each sensor. |
Scheme 253
Scheme 254
Scheme 255
Scheme 256
Scheme 257
- Disconnect the ground cable from battery.
- Lift up the vehicle.
- Remove the under cover. Refer to «REMOVAL»(ref-565181-S28182960572013071000000) .
- Drain approximately 3.0 L (3.2 US qt, 2.6 Imp qt) of coolant. Refer to «DRAINING OF ENGINE COOLANT»(ref-565166-S11431215052013071000000) .
- Remove the clip (A) from the air intake boot.
- Loosen the clamp (B) connecting the air intake boot and air cleaner case (rear).
- Loosen the clamp (C) which connects the air intake boot and throttle body.
- Remove the air intake boot from the throttle body, and move it to the left side wheel apron.
- Disconnect the connectors (A) from the throttle position sensor.
- Disconnect the preheater hose (B) from the throttle body.
- Remove the throttle body from the intake manifold.
THROTTLE SENSOR (METHOD WITH SUBARU SELECT MONITOR)
- Turn the ignition switch to ON. (engine OFF)
- Read the throttle opening angle signal and voltage of throttle sensor using Subaru Select Monitor. Refer to «DISPLAY OF ENGINE FREEZE FRAME DATA»(ref-565182-S42652795882013071000000) . Throttle sensor Throttle opening angle signal Standard Main 0.0% Approx. 0.6 V 100.0% Approx. 4.0 V Sub 0.0% Approx. 1.5 V 100.0% Approx. 4.2 V
CRANKSHAFT POSITION SENSOR (METHOD WITH CIRCUIT TESTER)
Measure the resistance between crankshaft position sensor terminals.
| Terminal No. | Standard |
|---|
| 1 and 2 | 2.04±0.204 kohms |
Scheme 258
Scheme 259
- Prepare an oscilloscope.
- Remove the back panel - pocket. Refer to «REMOVAL»(ref-565181-S42510260442013071000000) .
- Connect the probe to ECM connector. Terminal No. Probe 17 + 25
- Start the engine and let it idle.
- Check the pattern is the same as the waveform and voltage shown below.
- After inspection, install the related parts in the reverse order of removal.
CHECK THE INTAKE AIR TEMPERATURE SENSOR UNIT
Measure the resistance between intake air temperature sensor terminals.
Scheme 260
Scheme 260: CHECK THE INTAKE AIR TEMPERATURE SENSOR UNIT
| Temperature | Terminal No. | Standard |
|---|
| 20°C (-4°F) | 1 and 2 | 16.0±2.4 kohms |
| 20°C (68°F) | 2.45±0.24 kohms |
| 60°C (140°F) | 0.58±0.087 kohms |
RELEASING OF FUEL PRESSURE
| WARNING | Place "NO OPEN FLAMES" signs near the working area. |
| CAUTION | Be careful not to spill fuel. |
Scheme 261
- Remove the fuse of fuel pump from main fuse box.
- Start the engine and run it until it stalls.
- After the engine stalls, crank it for five more seconds.
- Turn the ignition switch to OFF.
- Install the fuse of fuel pump to the main fuse box.
EVAPORATION HOSE CONNECTION
Connect the evaporation hose to the pipe with an overlap of 15 to 20 mm (0.59 to 0.79 in).
L = 17.5±2.5 mm (0.689±0.098 in)
Scheme 262
Scheme 262: EVAPORATION HOSE CONNECTION
CONNECTING THE EVAPORATION LINE QUICK CONNECTOR
| CAUTION | Make sure there are no damage or dust on connections. If necessary, clean the seal surface of the pipe. Make sure that the quick connector is securely connected. |
Connect the quick connector as shown in the figure.
Scheme 263
