Page 597 of 687
Downloaded from www.Manualslib.com manuals search engine 6C-2 ENGINE FUEL
General Description
Fuel System
The main components of the fuel system are fuel tank, fuel pump assembly with fuel filter and fuel level gauge
and fuel cut valve, fuel feed line, fuel return line and fuel vapor line.
For the details of fuel flow and fuel vapor flow, refer to “Fuel Delivery System” and “Emission Control System” in
Section 6E.
Fuel Tank
The fuel tank is located under the rear section of the vehicle. The
fuel pump assembly is installed in fuel tank. Whenever servicing
the fuel pump assembly, the fuel tank must be removed from the
vehicle.
1. Fuel tank 4. Fuel filler cap 7. Fuel vapor line 10. Fuel filler hose clamp
2. Fuel pump assembly 5. Fuel feed line 8. Fuel filler neck Tightening torque
3. Breather hose 6. Fuel return line 9. Fuel tank mounting bolt
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Downloaded from www.Manualslib.com manuals search engine 6C-4 ENGINE FUEL
On-Vehicle Service
Before work, refer to “Precaution on Fuel System Service” in Sec-
tion 6.
Fuel Lines
Due to the fact that fuel feed line is under high pressure, use spe-
cial care when servicing it.
INSPECTION
Visually inspect fuel lines for evidence of fuel leakage, hose crack
and deterioration, or damage. Make sure all clamps are secure.
Replace parts as needed.
Fuel Filler Cap
Remove cap (1) and check gasket (2) for even filler neck imprint
and deterioration or any damage. If gasket is in malcondition,
replace cap.
Fuel Tank
REMOVAL
1) Relieve fuel pressure in fuel feed line referring to “Fuel Pres-
sure Relief Procedure” in Section 6.
2) Disconnect negative cable at battery.
3) Remove fuel filler cap.
NOTE:
If cap requires replacement, only a cap with the same fea-
tures should be used. Failure to use correct cap can
result in critical malfunction of system.
WARNING:
Before starting the following procedure, be sure to
observe “Precaution on Fuel System Service” in Sec-
tion 6.
Keep fuel tank horizontally and stably when removing
it. Fuel may come out if tank is tilted. Also, fuel tank
may drop and cause personal injury.
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Downloaded from www.Manualslib.com manuals search engine ENGINE FUEL 6C-5
4) Insert hose of a hand operated pump into fuel filler hose (1)
and drain fuel in space “A” in the figure (drain fuel through it
till fuel stops).
5) Hoist vehicle.
6) Remove exhaust center pipe referring to “Components” in
Section 6K and rear propeller shaft referring to “Propeller
Shafts” in Section 4B.
7) Disconnect coupler (1) for fuel pump assembly.
The coupler is close by left rear suspension coil spring (3).
8) Remove fuel tank filler hose protector.
Disconnect filler hose and breather hose from fuel filler neck.
9) Disconnect fuel vapor hose from pipe.
10) With fuel tank supported on a jack, remove fuel tank bolts.
11) Lower fuel tank a little and hold it. Unclamp fuel hoses and
disconnect them from fuel pump assembly (1).
When disconnecting joints of fuel feed line and return line
from pipe, unlock joint by inserting special tool between pipe
(3) and joint lock first.
Special tool
(A) : 09919-47020 CAUTION:
Do not force hose of a hand operated pump into fuel
tank. Doing so can damage inlet valve (2).
2. Fuel tank
2. Quick joint 5. Disconnect joint
4. Insert special tool
Page 602 of 687

Downloaded from www.Manualslib.com manuals search engine ENGINE FUEL 6C-7
INSTALLATION
1) Install fuel pump (1) assembly to fuel tank. Refer to “Fuel
Pump Assembly” in this section. Install protector to fuel tank.
2) Install inlet valve to fuel tank.
If deformed or damaged in any other way, replace with a new
one.
3) Connect fuel filler and breather hoses to fuel tank and vapor
hose to fuel pump assembly. Clamp them securely.
4) Lift up fuel tank on jack.
Connect fuel feed hose (4) and return hose (3) to pipes as
shown in figure and clamp them securely.
5) Install fuel tank to vehicle and connect wire harness coupler.
6) Connect fuel filler hose and breather hose to fuel filler neck.
Connect fuel vapor hose to pipe. Clamp them securely.
7) Install fuel filler hose protector.
Fuel Pump Assembly
REMOVAL
1) Remove fuel tank from vehicle. Refer to “Fuel Tank” in this
section.
2) Disconnect wire harness coupler and fuel vapor hose from
fuel pump assembly.
3) Remove fuel pump assembly from fuel tank by removing
bolts. CAUTION:
When connecting joint, clean outside surfaces of pipe
where joint is to be inserted, push joint into pipe till joint
lock clicks and check to ensure that pipes are connected
securely, or fuel leak may occur.
2. Quick joint
WARNING:
Before starting the following procedure, be sure to
observe “Precaution on Fuel System Service” in Section
6.
Page 610 of 687

Downloaded from www.Manualslib.com manuals search engine ENGINE AND EMISSION CONTROL SYSTEM 6E-5
Air Intake System
The main components of the air intake system are air cleaner (1), air cleaner outlet hose (2), throttle body (3),
idle air control valve (4) and intake manifold (5).
The air (by the amount corresponding to the throttle valve (6) opening and engine speed) is filtered by the air
cleaner (1), passes through the throttle body (3), is distributed by the intake manifold (5) and finally drawn into
each combustion chamber.
When the idle air control valve (4) is opened according to the signal from ECM, the air (7) bypasses the throttle
valve (6) through bypass passage and is finally drawn into the intake manifold (5).
1. Air Cleaner 17. Knock sensor 31-2. Test switch terminal
(vehicle w/o immobilizer indicator lamp)
2. EVAP canister purge valve 18. ECT sensor 31-3. Duty output terminal
(vehicle w/o immobilizer indicator lamp)
3. IAT sensor 19. CMP sensor 32. Immobilizer indicator lamp (if equipped)
4. TP sensor 20. CKP sensor 33. Stop lamp switch
5. IAC valve 21. VSS 34. ECM
6. MAP sensor 22. A/C condenser fan (if equipped) 35. Barometric pressure sensor
(vehicle with immobilizer indicator lamp)
7. EGR valve (if equipped) 23. Malfunction indicator lamp in combination meter 36. Battery
8. EVAP canister 24. Park/Neutral position switch in TR switch (A/T) 37. Immobilizer control module (if equipped)
9. Tank pressure control valve (built-in fuel pump) 25. Ignition switch 38. ABS control module (if equipped)
10. Fuel pump 26. Starter magnetic switch 39. CO adjusting resistor (if equipped)
11. Fuel level sensor 27. TCM (A/T) 40. Power steering pressure switch
(if equipped)
12. Ignition coil assembly 28. Transmission range switch (A/T) 41. A/C compressor clutch (if equipped)
13. Fuel injector 29. DLC 42. A/C EVAP TEMP. sensor (if equipped)
14. Heated Oxygen Sensor (HO2S)-1 (if equipped) 30. Electric load 43. A/C switch (if equipped)
15. Heated Oxygen Sensor (HO2S)-2 (if equipped) 31. Monitor connector (if equipped)
16. Three way catalytic convertor (if equipped) 31-1. Diagnosis switch terminal
(vehicle w/o immobilizer indicator lamp)
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Downloaded from www.Manualslib.com manuals search engine ENGINE AND EMISSION CONTROL SYSTEM 6E-7
Electronic Control System
The electronic control system consists of 1) various sensors which detect the state of engine and driving condi-
tions, 2) ECM which controls various devices according to the signals from the sensors and 3) various controlled
devices.
Functionally, it is divided into the following sub systems:
Fuel injection control system
Idle speed control system
Fuel pump control system
A/C control system (if equipped)
A/C condenser fan control system
EGR system (if equipped)
Evaporative emission control system
Oxygen sensor heater control system
Ignition control system
Also, with A/T model, ECM sends throttle valve opening signal and over drive cut signal to transmission control
module to control A/T.
NOTE:
The figure shows left-hand steering vehicle. For right-hand steering vehicle, parts with (*) are installed
at the other side.
1. IAT sensor a : Immobilizer indicator lamp (if equipped) A : ECM
2. TP sensor b : A/C condenser fan motor relay (if equipped) B : A/T control module
3. Monitor connector c : Main relay C : EVAP canister
4. CO adjusting resistor (if equipped) d : Fuel pump relay D : DLC
5. CKP sensor e : IAC valve E : ABS control module (if equipped)
6. MAP sensor f : EVAP canister purge valve
7. CMP sensor g : EGR valve (if equipped)
8. Transmission range switch h : Fuel injector
9. VSS i : Ignition coil assemblies
10. HO2S-1 (if equipped) J : MIL
11. HO2S-2 (if equipped)
12. ECT sensor
13. Knock sensor
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Engine & emission control input / output table
INPUTOUTPUT
ELECTRIC CONTROL DEVICE
DIAGNOSIS SWITCH TERMINAL
(VEHICLE WITHOUT IMMOBILIZER INDICATOR LAMP)
BAROMETRIC PRESSURE SENSOR
(VEHICLE WITH IMMOBILIZER INDICATOR LAMP)
STOP LAMP SWITCH
STARTER SWITCH
IGNITION SWITCH
LIGHTING SWITCH
REAR DEFOGGER SWITCH (IF EQUIPPED)
BLOWER SWITCH
A/C SWITCH (IF EQUIPPED)
A/C EVAPORATOR TEMP. SENSOR (IF EQUIPPED)
VSS
HEATED OXYGEN SENSOR-1 (IF EQUIPPED)
HEATED OXYGEN SENSOR-2
(IF EQUIPPED)For detecting deterioration of
three way catalytic converter
IAT SENSOR
ECT SENSOR
TP SENSOR
MAP SENSOR
CMP SENSOR
CKP SENSOR
TEST SWITCH TERMINAL
(VEHICLE WITHOUT IMMOBILIZER INDICATOR LAMP)
KNOCK SENSOR
FUEL PUMP RELAY
FUEL INJECTOR
HO2S HEATER
IAC VALVE
IGNITION COIL WITH IGNITER
EGR VALVE (IF EQUIPPED)
EVAP CANISTER PURGE VALVE
A/C COMPRESSOR CLUTCH
MIL
MAIN RELAY
TRANSMISSION CONTROL MODULE SIGNAL FROM SENSOR, SWITCH AND CONTROL MODULEA/C CONDENSER FAN RELAY
Page 615 of 687

Downloaded from www.Manualslib.com manuals search engine 6E-10 ENGINE AND EMISSION CONTROL SYSTEM
1. CKP sensor 20. Power steering pressure switch
(if equipped)39. Ignition coil assembly (for No.1 and No.4 spark plugs)
2. CMP sensor 21. A/C switch 40. Ignition coil assembly (for No.2 and No.3 spark plugs)
3. VSS 22. A/C refrigerant pressure switch
(if equipped)41. Stop lamp switch
4. MAP sensor 23. Immobilizer control module (if equipped) 42. Stop lamp
5. Knock sensor 24. Data link connector 43. Lighting switch
6. TP sensor 25. Injector No.1 44. Position lamp
7. ECT sensor 26. Injector No.2 45. Rear defogger switch (if equipped)
8. IAT sensor 27. Injector No.3 46. Rear defogger (if equipped)
9. Heated oxygen sensor-1 (if equipped) 28. Injector No.4 47. A/C compressor clutch (if equipped)
10. Heated oxygen sensor-2 (if equipped) 29. IAC valve 48. Ignition switch
11. A/C evaporator temp. sensor (if equipped) 30. EVAP canister purge valve 49. Main relay
12. Speedometer 31. Fuel pump relay 50. CO adjusting register (if equipped)
13. Fuel level sensor 32. Fuel pump 51. Starting motor
14. TCM (A/T) 33. A/C condenser fan relay (if equipped) 52. 4WD controller (4WD)
15. Transmission range switch (A/T) 34. A/C condenser fan motor (if equipped) 53. ABS control module (if equipped)
16. Shift lock solenoid (A/T, if equipped) 35. EGR valve (if equipped) 54. Engine ground
17. Backup lamp 36. Malfunction indicator lamp 55. Body ground
18. Heater fan motor 37. Immobilizer indicator lamp (if equipped)
19. Heater fan switch 38. Monitor connector (vehicle without immo-
bilizer indicator lamp)