Throttle Body (EJ Series)
Removal
Note:
- When removing and installing, use the assembly drawing "Removing and installing the throttle body".
- Do not disconnect coolant hoses while the engine is hot.
1. Disconnect the cable from the negative terminal of the battery.
2. (Models with automatic transmission) Disconnect the throttle valve cable from the engine side.
3. Disconnect the accelerator cable.
4. Disconnect the hoses.
5. Loosen the tie bolts and remove the throttle body.
Examination
1. Check that there is no excessive play in the throttle body lever.
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2. Make sure that the throttle body passages are not clogged.
3. Make sure the throttle valve opens and closes smoothly.
4. Make sure that when the throttle valve is fully closed, there is no gap between the screw and the lever.
5. Check the throttle position sensor.
a) Check the resistance between terminals "VC" and "E2".
- Nominal resistance - 2.5-6.0 kOhm
b) Check the resistance between terminals "VTH" - "E2" of the throttle position sensor.
Make sure that the resistance changes depending on the valve opening angle.
Nominal resistance:
- throttle valve fully closed - 0.4 kOhm
- throttle fully open - 3.4 kOhm
6. Check the idle speed control valve using an oscilloscope (see subsection "Checking injection system components using an oscilloscope").
Installation
1. Clean the mounting surfaces and install a new throttle body gasket.
2. Connect the fuel vapor recovery system hose going to the fuel vapor canister to port (A) and the fuel hose going to the throttle body to port (B).
3. Install the stand, temporarily tighten the bolt on the cover side, tighten the nut on the intake manifold side, finally tighten the bolt.
4. Install the accelerator cable. Adjust the free play of the accelerator cable.
- Free play - 1-5 mm
5. Connect the throttle valve cable from the engine side.
6. Connect the cable to the negative terminal of the battery.
Throttle body (KZ series)
Removal
1. Disconnect the cable from the negative terminal of the battery.
2. Remove the air filter.
3. Disconnect the accelerator cable.
Removing and installing the throttle body (EJ-DE).
1 - air filter housing,
2 - accelerator cable,
3 - stand,
4 - gasket,
5 - coolant hose,
6 - throttle body.
Removing and installing the throttle body (EJ-VE).
1 - air hose,
2 - air filter housing,
3 - air filter hose No.2,
4 - accelerator cable,
5 - stand,
6 - fuel vapor recovery system hose,
7 - fuel hose,
8 - electro-pneumatic valve,
9 - coolant hose,
10 - throttle body,
11 - gasket.
Removal and installation of the throttle body (KZ series).
1 - accelerator cable,
2, 9 - ring seal,
3 - throttle body bracket,
4, 5 - coolant hose,
6 - fuel vapor recovery system hose,
7 - ventilation system hose No.2,
8 - throttle body.
Location of components of the electronic engine control system (EJ-DE, models for Japan).
1 - fuel pump,
2 - electronic control unit,
3 - relay block,
4 - nozzle,
5 - fuel knock sensor,
6 - start inhibit switch (models with automatic transmission),
7 - coolant temperature sensor,
8 - oxygen sensor,
9 - oil pressure sensor,
10 - camshaft position sensor,
11 - ignition coil,
12 - intake air temperature sensor,
13 - ISC valve,
14 - throttle position sensor,
15 - absolute air pressure sensor at the intake,
16 - diagnostic connector,
17 - vehicle speed sensor.
4. Disconnect the connectors from the idle speed control valve and the throttle position sensor.
1 - idle speed control system valve,
2 - throttle position sensor.
5. Disconnect the coolant hoses.
6. Loosen the bolts and remove the throttle body.
Examination
1. Check that there is no excessive play in the throttle body lever.
2. Make sure that the throttle body passages are not clogged.
3. Make sure the throttle valve opens and closes smoothly.
4. Make sure that when the throttle valve is fully closed, there is no gap between the screw and the lever.
5. Check the throttle position sensor.
a) Check the resistance between terminals "VC" - "E2".
- Nominal resistance - 2.5 - 5.0 kOhm
b) Check the change in resistance between terminals "VTH" - "E2" depending on the throttle valve opening angle.
- Throttle valve fully closed - 0.4 kOhm
- Throttle fully open - 3.4 kOhm
6. Check the idle speed control system valve using an oscilloscope (see the subsection "Checking the injection system components using an oscilloscope").
Installation
1. Install the coolant bypass hoses with the short hose facing down.
2. Install the accelerator cable, adjust the accelerator pedal free play and tighten the nut.
- Free play - 3-5 mm
- Tightening torque - 8 ±1 Nm
3. (KZ series) Install the air filter.
4. Connect the wire to the negative terminal of the battery.