1987 TOYOTA CELICA warning

jS EFI SYSTEM - Troubleshooting with Volt/Ohmmeter (MS)
-.
0
“B”
Fl294.
ECU
EFI SYSTEM CHECK PROCEDURE
._
PREPARATION
(a) Disconnect the connectors from the ECU.
(b) Remove the locks as shown in the illustration so that
the tester probe(s) can easily come in.
CAUTION: Pay attention to sections “A” and “B” in
the illustration which can be easily broken,
(c) Reconnect the connectors to the ECU.
’
NOTE:
0 Perform ail voltage measurements with the connectors
connected.
0 Verify that the battery voltage is 1 IV or above when
the ignition switch is at “ON”.
Using a voltmeter with high-impedance (10 kQ/V mihimum),
measure the voltage at each terminal of the wiring con-
nectors.
Terminals of ECU
rmbol Terminal Name Symbol Terminal Name
Symbol Terminal Name
EOI POWER GROUND NE DISTRIBUTOR ACPS A/C PRESSURE SWITCH
co2 POWER GROUND El COMPUTER GROUND SPD SPEEDOMETER
o. 10 INJECTOR (No. 1 and 4) VF CHECK CONNECTOR ECT ECT COMPUTER
o. 30 INJECTOR (No. 3 and 5)
GO DISTRIBUTOR ACR A/C COMPRESSOR
o. 20 INJECTOR (No. 2 and 6) TE2 CHECK CONNECTOR Ll
ECT COMPUTER
ELS DEFOGGER SWITCH
HEADLIGHT SWITCH TEl CHECK CONNECTOR L2
ECT COMPUTER
FPU VSV (FPU) KNK KNOCK SENSOR FPR FUEL PUMP RELAY
ACV VSV (A/R CONTROL) THW WATER TEMP. SENSOR L3 ECT COMPUTER
SC 1 ISC MOTOR NO. 1 COIL IDL
THROTTLE POSITION SENSOR W
WARNING LIGHT
IGT IGNITER THA AIR TEMP. SENSQR
M-REL EFI MAIN RELAY (COIL)
SC- ISC MOTOR NO. 2 COIL VTA THROlTLE POSITION SENSOR IG SiW IGNITION SWITCH 3
ISC3 ISC MOTOR NO. 3 COIL vs AIR FLOW METER Bl EFI MAIN RELAY
ISC4 ISC MOTOR NO. 4 COIL vcc AIR FLOW METER
THROTTLE POSITION SENSOR BATT BATTERY
IGF IGNITER E2
SENSOR GROUND B
EFI MAIN RELAY
G2 1 DISTRIBUTOR 1 STA 1 STARTER SWITCH
Gl 1 DISTRIBUTOR 1 NSW 1 NEUTRALSTARTSWITCH
ZU Terminals

EFI SYSTEM - Ttpbleshooting with Volt/Ohmmeter (MS)
FL59
IO.
I Terminals
BATT - El
IG S/W - El
M-REL - El
2P-
I UTA - E2
3
US - E2
THA - E2
THW - E2
.B / IGF, IGT - El
9 ISCI
lSC4 - El
10
I W - El
ECU Terminals
Voltage at ECU Wiring Connectors
Condition STD Voltage ’
10 - 14
ignition S/W ON
10 - 14
Throttle valve open 10 - 14
4-6
Ignition S/W ON .
Throttle valve fully closed 0.1 - 1.0
Throttle valve fully open
4-5
4-6
Ignition S/W ON Measuring plate fully closed
4-5
Measuring plate fully open
0.02 - 0.08
Idling 2-4
3,000 rpm 0.3 - 1 .o
Ignition S/W ON 9
- 14 FI-66
Ignition S/W ON Intake air temperature 20°C (68°F) 1
-3
Ignition S/W ON
Coolant temperature 80°C (176°F) 0.1 - 1.0
Cranking
6 - 14
Idling 0.7 - 1.0
Ignition S/W ON
9 - 14
No trouble (“CHECK-ENGINE” warning light off) and
engine running 8 - 14 See page
FI-60
FI-6 1
FI-62
FI-63
FI-64
Fl-65
Fl-6.7
FI-68
FI-69
Fl-70
FI-7 1
Fl;72

72 EFI SYSTEM ‘- Troubleshooting with Volt/Ohmmeter (MS)
40.
10 Terminals
W - El
. .
Trouble ,, Condition
No voltage _ No trouble (“CHECK engine warning
>‘Iight om and engine running STD Voltage
a-14v
. FUSE
GAUGE 7.5A
f$.; ..
w-im~~
S&INE-
Warning Light ECU
I
W
El
F12772
ECU
__
There is no voltage between ECU terminals W and El. !:, ;,:;:,p i, @
.,..I fldling)
1
,..
‘CD Check that there is voltage between ECU terminal W and
bodv around. ’ 1
_ -
I
NO OK
0 Check wiring between ECU terminal El and body
ground:..
*
OK BAD
Try another ECU.
I. Repair or replace.
: . i’ F1277
d% F12755
Check GAUGE fuse (7.5A) and “CHECK
~ ENGINE” warning light.
,. r
OK BAD
Repair or replace.
t Fuse blows again
Check wiring between ECU terminal
BAD
W and fuse. Repair or replace.

?I-78 EFI SYSTEM - Fuel Systeti
-_
REMOVAL OF FUEL PUMP
._
Fuel Pump Bracket
Filter
. i’
@-Rubber Cushion
+ Non-reusable part
FI166
1. DISCONNECT CABLE FROM NEGATIVE TERMINAL
OF BATTERY
2. DRAIN GASOLINE FROM FUEL TANK
WARNING: Do not smoke or work near an open
flame when working on the fuel pump.
3.
4. REMOVE FUEL TANK
REMOVE FUEL PUMP BRACKET FROM FUEL TANK
(a) Remove the screws.
(b) Pull out the fuel pump bracket.
REMOVE FUEL PUMP FROM FUEL PUMP BRACKET
(a) Remove the two nuts and disconnect the wires from
the fuel pump.
(b) Pull off the lower side of the fuel pump from the
bracket.
(c) Remove the fuel pump from the fuel hose.

EFI SYSTEM - Fuel System
Fl-81
4.
Union Bol
Gasket
F1298
(c) Remove the union bolt, fuel tube and two gaskets.
REMOVE COLD START INJECTOR
(7~-GE)
Remove the two bolts and cold start injector with the
gasket.
(7M-GTE)
Remove the two bolts and cold start injector with the
gasket, and disconnect the cold start injector connector.
INSPECTION OF COLD START INJECTOR
1.
(7M-GTE)
INSPECT RESISTANCE OF COLD START INJECTOR
Using an ohmmeter, check the resistance of the injector.
Resistance: 2 - 4 fi
If the resistance is not as specified, replace the cold start
injector.
2.
INSPECT INJECTION OF COLD START INJECTOR
WARNING: Keep clear of sparks during the test.
(a) Install SST (two unions) to the injector and delivery
pipe with new gaskets and the union bolts.
SST 09268-41045
(b) Connect the SST (hose) to the unions.
SST 09268-41045
(c) Connect the SST (wire) to the injector,
SST
09847-RnnKn

EFI SYSTEM - Fuel System’
IkPECTlON OF INJECTOR
j; TEST INJECTION 0; INJECTORS
.WARNING: Keep clear of sparks during the test.
AS
i
c.
Disconnect SST
uel Filter
Fl197
Fl25-l
New
Union
Bolt
I
Fuel
Return-
Hose Pressure
Regulator
SST (Union)
SST (Hose) (a) Disconnect the No. 1 fuel pipe from the fuel return
pipe support (MA) or fuel filter (MS).
(b) Connect SST (hose) to the fuel pipe support (MA) or
fuel filter (MS) outlet with SST (union), new gaskets
and union bolt.
SST 0926841045
NOTE: Use the vehicle’s fuel support (MA) or fuel filter
(MS).
(c) Remove the pressure regulator (See page FI-84).
(d) Connect the fuel return hose to the pressure regula-
tor with SST (union), new gasket and union bolt.
SST 09268-41045
(e) Connect SST. (hose) to the pressure regulator with
SST (union).
SST 09268-41045

FI-126 EFI SYSTEM - Electronic Control &stem
Voltage at ECU W.jring Connectors (Cont’d)
.:. .I, ,,
Termlnals
Nov
10 EOI
No. 20 -
No. 30
E2
STD Voltage
6 L ,4-,: Condition
Ignition S/W ON
STA - El
ISCI
I -El
ISC4
,, : :
IGF, IGT - .E-1
*‘IGdA, lGd8 - El
:
‘2HAC - E2 6 - 14
9 - 14
-
I, .., ,i,
o .,.- i.;&& ,; ::
:,, ;;:3%
. . 1
Approx: 2.8
- Ignition S/w ON
Approlr. -3.6 L Cranking
,
Ignition S/W ON
Idling
Idling
540 mm Hg (21.26 in.Hg, 72.0 kPa)
750 mm Hg (I 29.53 in.Hg, 100.0 kPa)
W - El ‘: :g L ;I 4
: No trouble (“CHECK ENGINE” warning light off) and
engine running.
1
*3A/C - El .,. . :.llC 1~14 Air conditioning ON
>-
T - El 4A.6
Check connector T(TE1) - El not short
Ignition S/W ON
0 Check connector TfTEl) - El short
*3NSW (A/T) - El
*3N/C Uvl/TI -
El 0
Shift position P or N range
Ignition S/W ON
IO-14 Ex. P or N range
0: Clutch pedal not depressed
- Ignition S/W ON .
IO-14 Clutch pedal depressed
..-
I 1044 1 1 Defogger S/W OFF
I
“3DFG - El
“3LP - El 0
10 - 14
j) ‘. Ignition S/W ON
Defogger S/W ON
Headlight S/W OFF
Headlight S/W ON
*I 7M-GE only
*2 7M-GTE only
*3 MA only

ENGINE MECHANICAL - CylinderHead
:
EM:‘45;
‘N gij ggJ & gijJ &g ‘i$.
No. 1 No. 2 No. 3 No. 4 No. 5 No. 6 9. REMOVE VALVE LIFTERS WITH SHIMS ,...
Arra,nge the valve lifters and shims in order.
10. REMOVE VALVES
(a) Using SST, press the valve spring and remove the
two keepers.
SST 09202-70010
(b) Remove the-spring retainer, valve spring, seat and
valve.
(c) ‘Pry out the oil seal.
NOTE: Arrange the valves, seats, valve springs and
retainers in order.
INSPECTION, CLEANING AND REPAIR OF
CYLl.NDER HEAD COMPONENTS
1. CLEAN TOP OF; &ONS AND TOP OF CYLINDER
.BLOCk
.1.
(a) Turn the crankshaft and bring each piston to top
dead center. Using a gasket scraper, remove all the
‘carbon from the piston tops.
(b) Using a gasket scraper, remove all gasket material
from the top of the block. Blow carbon and oil from
the bolt holes.
WARNING: Protect your eyes when using high
pressure air.
2.
REMOVE GASKET MATERIAL
Using a gasket scraper, remove all gasket material from
the head and manifold surfaces.
CAUTION: Be careful not to scratch the surfaces.