1987 TOYOTA CELICA sensor

FI-124 EFI SYSTEM - Electronic Control System
-.
Ohmmeter 3. (‘IM-GTE)
INSPECT HEATERAESISiANCE OF OXYGEN
SENSOR
Using an ohmmeter, measure the resistance between the
terminals 2 and 3.
R8SiStaflC8:, 3.0 - 3.6 n
If the resistance is not as specified, replace the sensor.

Fl-128 EFI SYSTEM - Electronic Contpl SyStem
c
’ FlO54
Tachometer Fl114:
Fuel Cut RPM--
;INSPECTION OF FUEL CUT RPM
I.
2. WARM UP ENGINE
Allow the engine to reach normal operating temperature.
INSPECT FUEL CUT RPM
(a) Disconnect the connector from the throttle position
sensor.
(b) Short circuit terminals IDL and El on the wire con-
nector side.
(c) Gradually raise the engine rpm and check that there
is fluctuation the fuel cut and fuel return points.
NOTE: The vehicle should be stopped.
Fuel cut rpm:
1,800 rpm
Fuel return rpm: 1,200 rpm

LM-4
I ENGINE MECHANICAL -* Troubleshooting
_.
TROUBLESHOOTING
Problem Possible cause I Remedy Page
Engine overheats Cooling system faulty Troubleshoot cooling system co-4
Incorrect ignition timing Reset timing EM-1 7
Engine will not crank or Starting system faulty Troubleshoot starting system ST-2
cranks slowly : .
Engine will not start/ Vacuum leaks Repair as necessary
hard to start 0 PCV hoses ”
(cranks OK) 0 (w/ EGR)
EGR valve
0 Intake manifold
0 Air intake chamber
0 Throttle body
0 ISC valve
Pulling in air between air flow meter and Repair as necessary FI-96, 93
throttle body
Ignition problems Perform spark test IG-5, 12
0 Ignition coil
0 Igniter
0 (7M-GE)
Distributor
(7M-GTE)
Cam position sensor
High-tension cord disconnected or broken Inspect cord IG-6, 13
No fuel supply to injector Troubleshoot EFI system FI-I 2
l No fuel in tank
0 Fuel pump not working
l Fuel filter clogged
0 Fuel line clogged or leaking
EFI system problems Repair as necessary
ISC system problem Check ISC system FL- 108
Spark plugs faulty Inspect plugs IG-7
Low compression Check compression EM-26, 2
Rough idle, stalls or Vacuum leaks Repair as necessary
misses 0 PCV hoses
0 (w/ EGR)
EGR valve
0 Intake manifold
0 Air intake chamber
0 Throttle body I
0 ISC valve
Pulling in air between sir flow meter and FI-96, 9
throttle body
Incorrect idle speed Check ISC system FI- 108
Incorrect ignition timing Reset timing EM-1 7
Ignition problems Perform spark test IG-5, 12
0 Ignition coil
0 Igniter
0 (-/M-GE)
Distributor
(-/M-GTE)
Cam position sensor
High-tension cord faulty Inspect cord IG-6, 13
EFI system problems Repair as necessary

EM-8 ENGINE MECHANICAL -I Engine Tune-up
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lNS.PECTlON AND. ADJUSTMEtiT OF VALVE
CLEARANCE’
NOTE: Check and adjust the valve clearance while the
engine is cold.
1. REM?VE AIR INTAKE CONNECTOR
j
(a) Remove the PCV pipe.
(b) (ex. MS RHD)
.Disconnect the accelerator connecting rod.
(c) Disconnect the water by-pass hoses from the throt-
tie body.
(d) Disconnect following hoses:
. (w/ EGR)
VSV hose(for EGR) .
l . (w/ TWC)
BVSV hose
. (w/ EGR)
EGR vacuum modulator hoses
0 No.7 air hose
(e) Disconnect the throttle position sensor connector.
(f) Remove the. throttle body bracket(s).
(g) Remove the air intake connector bracket mounting
bolts.
c J
I (h) Remove the four bolts, two nuts, air intake connect01
and gasket.
2. REMOVE CYLINDER HEAD COVERS
(See pages EM-59,601

” .
.(b) Install the air intake connector bracket mounting
bolts.
. .
. ~(6) ’ Install the.throttle body bracket’(s).
(d) Connect the throttle position sensor connector.
(e) ! Connect following hoses:
0 No.7 air hose
0 (w/ EGR) 6.
‘E6R vaixum modulator hoses
. (w/WC)’
BVSW hose
.’
l (w/ EGR)
VSV hose (for EGR)
1 (f) Connect the water by-pass hoses.
(g) (ex. MS RHD) ::‘. . ‘.
Connect the accelerator connecting rod.
.++:s (h) Install the: PCV pipe;. .:, ‘.f. -.,,
: ‘:
:, -’
‘2.. 1 :
,.:’ . j;:..
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EM-12 ENGINE MECHANICAL - Engine Tune-up
r
(7M-GTE)
1. REMOVE ISC PIPE
(a) Disconn&t the hoses from the ISC pipe.
(b) Remove‘the two bolts and ISC pipe.
2. REMOVE PCV PIPE WITH HOSES
(a) Disconnect the oxygen sensor wire from the two
clamp.
:
(b) Disconnect the No.4 PCV hose from the ‘PCV pitie.
(c) Remove the two bolts.
(d) Disconnect the PCV pipe with hoses from the
cylinder head covers and throttle body.
‘. ,$’
ci ;- ,
. .
3. REMOVE INTAKE AIR CONNECTOR
(a) Disconnect the air valve hose from the intake air con-
nector.
(b) Loosen the clamp and remove the two bolts.
(c) Remove the intake air connector.
4. REMOVE IGNITION COVER
(a) Remove the oil filler cap.
(b) Remove the five nuts and ignition coil cover.
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5. REMOVE IGNITION COIL WITH BRACKET
(a) Disconnect the connector and ground strap.
(b) Remove the nut.
(c) Remove the No.1 and No.2 high-tension cords from
the ignition coil and clamp.
IdI Remove the ignition coil with bracket and high-ten-
sion cords.
(e) Remove the No.1 and No.2 high-tension cords from
the spark plugs.

EM-14 ,ENG!NE M&XlANICAL~ - Engine Tuhe-up
13. lNSTALL INTAKE AIR CONNECTOR
(a) Install the intake air connector to throttle body.
6) Iristall and tighten the two nuts. li
s
s
(cl Tighten the clamp.
Ed) Connect the air valve hose to intake air connector. i
, -
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14;: INSTALL PCV PIPE WITH HOSES
(a) install the PCV pipe with hoses to the throttle body
.and cylinder head covers.
I . . /
, (b) . Install and tighten the two bolts.
,r ., F) .:, Connect the No.4 PCV hose to the PCV pipe.
(d) Connect the oxygen sensor wire to the two clam
‘,
. . . L. ,.
1: .15. INSTALL ISC PIPE
(a) Install the ISC pipe with the two bolts.
‘(b) Connect the hoses to the ISC pipe.
,,,1
. . -:
s.
.I

ENGINE MECHANICAL. - Engine Tune-up
EM-?1 7.
INS’PECTIOlil ‘AhiD ADJUSTMENT O:F .-
IGNITION TIMING
1. VriARiiA. UP ENGINE.
Allow the engine to. reach normal operating temperature.
2.
CbNNECT TACHOMETER AND TIMING LIGHT TO
ENGINE
Connect the tachometer positive terminal to the check
connector terminal IG 0 .
CHECK CONNECTOR LOCATION: .,
s See pages FI-110, 111
CAUTION:
l Never allow the tachometer terminal to touch
ground as it could result in damage to the igniter
and/or ignition coil.
, 4% 3.
EC21 18
s As some tachometers are not compatible with this
ignition system, we recommend that you confirm
the compatibility of your unit before using.
NOTE (7M-GTE): Connect the timing light pickup to t
No.6 cylinder high-tension cord.
CHECK IGNITION TIMING
(a) Using a service wire, short terminals T(MA) or
TEI (MS) and El of the check connector.
CHEC,K CCNNECTOR LOCATION.:
See pages FI- 1’10, 111
(b) Check the idle. speed.
Idle speed: /-
7M-GE w/ TWC 700 rpm
w/o TWC 800 rpm
7M-GTE 800 rpm
(c) Using a timing light, check the ignition timing.
Ignition timing: IO” BTDC @ idle
[w/ short-circuited T (TEl) and El
and Transmission in “N” range]
c,
If necessary, loosen the distributor (7M-GE) or cam posz-’
tion sensor (7M-GTE) bolt and turn the distributor (cam
position sensor) to align the marks. Recheck the timing
- after tightening the distributor (cam position sensor).
Torque: 140 kg-cm (10 ft-lb, 14 N-m)
(cl) Unshort the check connector.