Page 238 of 4770
FUEL PRESSURE REGULATOR
INSTALLATION
(See Components for Removal and Installation)
1. INSTALL FUEL PRESSURE REGULATOR
(a) Apply a light coat of gasoline to a new O±ring, and
install it to the pressure regulator.
2. CONNECT FUEL RETURN PIPE TO FUEL PRESSURE
REGULATOR
Install the return pipe with 2 new gaskets and the
union bolt.
Torque: 19 N±m (195 kgf±cm, 14 ft±lbf)
3. REMOVE FUEL PRESSURE REGULATOR
(a) Remove the 2 bolts, and pull out the pressure regula±
tor.
(b) Remove the O±ring from the pressure regulator.
3. CONNECT VACUUM SENSING HOSE TO FUEL
PRESSURE REGULATOR
4. CHECK FOR FUEL LEAKAGE
(See page EG1±176) (b) Install the pressure regulator with the 2 bolts.
Torque: 5.4 N±m (55 kgf±cm, 48 in.±lbf)
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±188
Page 306 of 4770

2. INSPECT LOCK PLATE
Inspect the lock plate for damage.
HINT:
wIf the sides of the lock plate groove are deformed,
reassembly of the tank will be impossible.
wTherefore, first correct any deformation with pliers or
similar object. Water leakage will result if the bottom
of the lock plate groove is damaged or dented. There±
fore, repair or replace if necessary.
4. ASSEMBLE SST
SST 09230±01010
(a) Install the punch assembly to the overhaul handle,
inserting it in the hole in part ªAº as shown in the
illustration.
(b) While gripping the handle, adjust the stopper bolt so
that dimension ªBº shown in the diagram is 7.7 mm
(0.03 in.) 3. INSTALL NEW O±RINGS AND TANKS
(a) After checking that there are no foreign objects in the
lock plate groove, install the new O±ring without
twisting it.
HINT: When cleaning the lock plate groove, lightly rub
it with sand paper without scratching it.
(b) Install the tank without damaging the 0±ring.
(c) Tap the lock plate with a soft±faced hammer so that
there is no gap between it and the tank.
5. CAULK LOCK PLATE
(a) Lightly press SST against the lock plate in the order
shown in the illustration.
± 5S±FE ENGINECOOLING SYSTEMEG1±256
Page 325 of 4770
3. FILL WITH ENGINE OIL
(a) Clean and install the oil drain plug with a new gasket.
Torque: 39 N±m (400 kgf±cm, 29 ft±lbf)
(b) Fill with new engine oil.
Oil grade: (See step 1 on page EG1±272)
Capacity (M/T):
Drain and refill
w/ Oil filter change
3.6 liters (3.8 US qts, 3.2 Imp. qts)
w/o Oil filter change
3.4 liters (3.6 US qts, 3.0 Imp. qts)
Dry fill
4.2 liters (4.4 US qts, 3.7 Imp. qts)
Capacity (A/T):
Drain and refill
w/ Oil filter change
3.6 liters (3.8 US qts, 3.2 Imp. qts)
w/o Oil filter change
3.4 liters (3.6 US qts, 3.0 Imp. qts)
Dry fill
4.3 liters (4.5 US qts, 3.8 Imp. qts)
(c) Reinstall the oil filler cap.
4. START ENGINE AND CHECK FOR LEAKS
5. RECHECK ENGINE OIL LEVEL
(See page EG1±272) (d) Lightly screw the oil filter into place, and tighten it
until the gasket contacts the seat.
(e) Using SST, tighten it an additional 3/4 turn.
SST 09228±06500 (c) Apply clean engine oil to the gasket of a new oil filter.
± 5S±FE ENGINELUBRICATION SYSTEMEG1±275
Page 337 of 4770
(b) Apply a light coat of engine oil on the threads and
under the head of the relief valve.
(c) Temporarily install the oil cooler with the nut.
(d) Install the plate washer and relief valve.
Torque: 78 N±m (800 kgf±cm, 58 ft±lbf)
(e) Tighten the nut.
Torque: 7.8 N±m (80 kgf±cm, 69 In.±lbf)
OIL COOLER INSPECTION
1. INSPECT RELIEF VALVE
Push the valve with a wooden stick to check if it is
stuck.
If stuck, replace the relief valve.
OIL COOLER INSTALLATION
(See Components for Removal and Installation)
1. INSTALL OIL COOLER
(a) Install new O±ring and gasket to the oil cooler. 4. REMOVE OIL COOLER
(a) Remove the relief valve and plate washer.
(b) Remove the nut and oil cooler.
(c) Remove the O±ring and gasket from the oil cooler.
2. INSPECT OIL COOLER
Check the oil cooler for damage or clogging.
If necessary, replace the oil cooler.
± 5S±FE ENGINELUBRICATION SYSTEMEG1±287
Page 346 of 4770

DIAGNOSIS SYSTEM
DESCRIPTION
The ECM contains a built±in self±diagnosis system by which
troubles with the engine signal network are detected and a
Malfunction indicator lamp on the instrument panel lights up.
By analyzing various signals as shown in the later table (See
page EG1±300) the Engine Control Module (ECM) detects
system malfunctions relating to the sensors or actuators.
In the normal mode, the self±diagnosis system monitors 14
items, indicated by code No. as shown in EG1±300. A mal-
function indicator lamp informs the driver that a malfunction
has been detected. The light goes off automatically when the
malfunction has been repaired. But the diagnostic trouble
code(s) remains stored in the ECM memory (except for code
Nos. 16). The ECM stores the code(s) until it is cleared by
removing the EFI fuse with the ignition switch off.
The diagnostic trouble code can be read by the number of
blinks of the malfunction indicator lamp when TE1 and E1
terminals on the data link connector 1 or 2 are connected.
When 2 or more codes are indicated, the lowest number
(code) will appear first.
In the test mode, 9 items, indicated by code No. as shown in
EG1±300 are monitored. If a malfunction is detected in any
one of the systems indicated by code Nos. 13, 22, 24, 25, 26,
27, 31, 41 and 71 the ECM lights the malfunction indicator
lamp to warn the technician that malfunction has been de-
tected. In this case, TE2 and E1 terminals on the data link
connector 1 or 2 should be connected as shown later. (See
page EG1±298).
In the test mode, even if the malfunction is corrected, the
malfunction code is stored in the ECM memory even when
the ignition switch is off (except code Nos. 43 and 51). This
also applies in the normal mode. The diagnostic mode (nor-
mal or test) and the output of the malfunction indicator lamp
can be selected by connecting the TE1, TE2 and E1 termi-
nals on the data link connector 1 or 2, as shown later.
A test mode function has been added to the functions of the
self±diagnostic system of the normal mode for the purpose of
detecting malfunctions such as poor contact, which are diffi-
cult to detect in the normal mode. This function fills up the
self±diagnosis system. The test mode can be implemented
by the technician following the appropriate procedures of
check terminal connection and operation described later.
(See page
EG1±298)
± 5S±FE ENGINEDIAGNOSIS SYSTEMEG1±296
Page 347 of 4770

Diagnosis Inspection (Normal Mode)
MALFUNCTION INDICATOR LAMP CHECK
1. The Malfunction indicator lamp will come on when the
ignition switch is turned ON and the engine is not run±
ning.
HINT: If the malfunction indicator lamp does not light
up, proceed to troubleshooting of the combination meter
(See page BE±64).
2. When the engine is started, the malfunction indicator
lamp should go off.
If the light remains on, the diagnosis system has detected
a malfunction or abnormality in the system.
DIAGNOSTIC TROUBLE CODE CHECK
1. Turn ignition switch on.
2. Using SST, connect terminals between TE1 and E1 of
data link connector 1 or 2.
SST 09843±18020
As an example, the blinking patterns for codes;normal,
12 and 31 are as shown on the illustration.
4. Check the details of the malfunction using the diagnostic
trouble code table on page EG1±300.
5. After completing the check, disconnect terminals TE1
and E1, and turn off the display.
HINT: I n the event of 2 or more malfunction codes,
indication will begin from the smaller numbered code
and continue in order to the larger.3. Read the diagnostic trouble code from malfunction indi±
cator lamp.
HINT: If a diagnostic trouble code is not output, check
the TE1 terminal circuit (See page EG1±430).
± 5S±FE ENGINEDIAGNOSIS SYSTEMEG1±297
Page 356 of 4770

*1; ªONº displayed in the diagnosis mode column indicates that the Malfunction Indicator Lamp is lighted up when a
malfunction is detected. ªOFFº indicates that the ªCHECKº does not light up during malfunction diagnosis, even if a
malfunction is detected. ªN.A.º indicates that the item is not included in malfunction diagnosis.
*2; ªOº in the memory column indicates that a diagnostic trouble code is recorded in the ECM memory when a malfunction
occurs. ªXº indicates that a diagnostic trouble code is not recorded in the ECM memory even if a malfunction occurs.
Accordingly, output of diagnostic results in normal or test mode is performed with the IG switch ON.
*3; Only for California specification vehicles.
*4; Only vehicles with A/T.EGR gas temp. is 70C (158F) or below for 50 sec. under
conditions (a) and (b).
(2 trip detection logic)*
(a) Engine coolant temp.: 80C (176F) or more.
(b) EGR operation possible (Ex. A/T in 3rd speed (5th for
M/T), 55 ± 60 mph (88 ± 96 km/h), Flat road).
(1) 3 sec. or more after engine starts with closed throttle position
switch OFF (IDL).
(2) * Park/Neutral switch OFF (PNP).
(Shift position in ªRº, ªDº, ª2º, or ªLº positions).
(3) A/C switch ON. Open or short in knock sensor circuit with engine speed
between 1,200 rpm and 6,000 rpm.Diagnostic trouble Code
Detecting Condition
Switch Condition
SignalNo starter signal to ECM.
Knock Sensor
Signal
EG R System
Malfunction Number of
MIL Blinks
Starter Signal DTC
No.Circuit
± 5S±FE ENGINEDIAGNOSTIC TROUBLE CODE CHARTEG1±306
Page 359 of 4770

CLEAR DIAGNOSTIC TROUBLE CODES
See page EG1±299.
SET TEST MODE
1. With the ignition switch off, using SST, connect the ter±
minals TE2 and E1 of the data link connector 1 and 2.
SST 09843±18020
2. Start the engine and check to see the malfunction indica±
tor lamp to go off.
PERFORM A SIMULATION TEST
Using the symptom simulation (See page IN ±24), apply vibra±
tion to and pull lightly on the wire harness, connector or
terminals in the circuit indicated by the malfunction code.
In this test, if the malfunction indicator lamp light up, it indi±
cates that the place where the wire harness, connector or
terminals being pulled or vibrated has faulty contact. Check
that point for loose connections, dirt on the terminals, poor fit
or other problems and repair as necessary.
HINT: After cancelling out the diagnostic trouble code in
memory and set the test mode, if the malfunction indicator
lamp does not go off after the engine is started, check thor±
oughly for faulty contact, etc., then try the check again. If the
malfunction indicator lamp still does not go off, check and
replace ECM.
CHECK FOR MOMENTARY
INTERRUPTION
As described in the preceding paragraph, abnormality detec±
tion ability in the test mode is increased compared to that in
the normal mode, so that when momentary interruptions or
momentary shorts occur in the ECM signal circuits (G, NE,
THW, THA, PIM, VTA) shown in the table below, the appro±
priate diagnostic trouble code is output.
Accordingly, when the diagnostic trouble codes shown in the
table below (13, 22, 24, 31, 41) are output during the diag±
nostic trouble code check, and inspection of the appropriate
circuits reveals no abnormality, perform the check for momen±
tary interruption as described below.
By performing the check for momentary interruption, the
place where momentary interruptions or momentary shorts are
occurring due to poor contacts can be isolated.
Engine coolant temp. sensor
circuit
Manifold absolute pressure
sensor circuit
Throttle position sensor circuitIntake air temp. sensor circuitG, NE signal circuit (No.2)Circuit DTC
± 5S±FE ENGINECHECK FOR MOMENTARY INTERRUPTIONEG1±309