coolant TOYOTA CELICA 1987 Service User Guide

EFI SYSTEM - Fuel System
-.
REMOVAL OF. INJECTOR
FI-87
1.
2.
3.
I A k DISCONNECT FOLLOWING CONNECTORS:
5.
8.
7. DISCONNECT CABLE FROM NEGATIVE TERMINAL
OF BATTERY
DRAIN COOLANT
DISCONNECT FOLLOWING HOSES:
l Water hoses from throttle body (7-M-GE) or water by-
pass pipe (‘IM-GTE)
0 Vacuum hoses from throttle body
0 ISC valve hoses from throttle body
0 Vacuum sensing hose from pressure regulator
0 Throttle position sensor connector
0 ISC valve connector
0 (‘IM-GE)
Cold start injector connector
REMOVE AIR INTAKE CONNECTOR
(7M-GE)
(a) Disconnect the air cleaner hose from the throttle
body.
(b) Remove the throttle body and air intake connector
brackets.
(c) Remove the four bolts and two nuts, intake connec-
tor and gasket.
(7M-GTE)
(See steps 1 to 3 on page EM-121
(‘IM-GTE)
REMOVE THROTTLE BODY (See page Fi-104)
REMOVE ISC VALVE
(a) Disconnect the No. 2 water by-pass hose from the
ISC valve.

EFI SYSTEM - Air Inductioi System
PI-1 03
-
1 7M-GE
I 7M-GTE
d
c q-rEA
vc
1
I I
in-7.h
IDL VTA VC ’
s --I
2. INSPECT THROTTLE POSITION SENSOR
(a) Disconnectthe connector from the sensor.
(b) Insert a thickness gauge between the throttle stop
screw and stop lever.
(c) Using an ohmmeter, measure the resistance between
each terminal.
(d) Reconnect the sensor connector.
./ !’
REMOVAL OF THROTTLE BODY ‘.
/ (7M-GE)
1. DRAIN COOLANT FRdM THROTTLE BODY
2. REMOVE ACCELERATOR CONNECTING ROD
3. DISCONNECT VACUUM HOSES
4.
DISCONNECT NO. 2 AND NO. 3 WATER BY-PASS
HOSES
. 1 5. DISCONNECT THROTTLE POSITION SEI
7.
REMOVE THROTTLE BODY BRACKET(S)
6. REMOVE THROTTLE BODY
Remove the four bolts and throttle body with the gasket,

Fl-104 EFI SYSTEM - Air Induction Svstem
;i7M-GTE)
1.
2.
3. thAIhi COOLANT -kROM THROTTLE BODY
DISCONNECT ACCELERATOR CONNECTING ROD
REMOVE AIR INTAKE CONNECTOR
(See steps 1 to 3 on page EM-121
4.
5.
/A-.( /w /
Trottle Stop Screw
DISCONNECT VACUUM HOSES
*
DISCONNECT THROTTLE POSITION SENSOR
CONNECTOR
REMOVE THROTTLE BODY
(a) Disconnect the tko water by-pass hoses from the
ISC valve and water pipe.
(b) Remove the four bolts, throttle body and gasket.
(cl Remove the two water by-pass hoses.
INSPECTION OF THROTTLE BODY
1. CLEAN THROTTLE BODY
(a) Using a soft brush and carburetor cleaner, clean the
cast parts.
(d) Using compressed air, clean all passages and aper-
tures.
CAUTION: To prevent deterioration, do not clean the
throttle position sensor and dash pot.
2. INSPECT THROTTLE VALVE
Check that there is no clearance between the throttle stop
screw and throttle lever when the throttle valve is fully
closed.

FI-106 EFI SYSTEM - Air Induction S&m
-.
@ls,TAL&ATION OF THROTTLE BODY
(?M-QE)
I FIlW
I-
/
1.
2.
3.
4.
6.
6.
7.
6. INSTALL THROTTLE BODY
Install the gasket-and throttle body with the four bolts.
Torque: 130 kg-cm (9 ft-lb, 13 Narn)
CONNECT THROTTLE BODY BRACKET@
CONNECT AIR CLEANER HOSE
CONNECT THROTTLE POSITiON SENSOR
CONNECTOR
CONNECT VACUUM HOSES
CONNECT WATER HOSES
CONNECT ACCELERATOR CONNECTING ROD
REFILL WITH COOLANT
(‘/M-GTE)
1. INSTALL THROTTLE BOPY
(a) Install the two water by-pass hoses.
(b) Install a new gasket and throttle body with the four
bolts.
(c) Connect the two water by-pass hoses to the ISC
valve and water pipe.

EFI SYSTEM - Air Induction System
FI-107
. .
2. CONNECT THROTTLE POSITION SENSOR
CONNiXTOR .-
3. CONNECT VACUUM HOSES
4. INSTALL AiR INTAKE CONNECTOR
:
(See steps 13 to 15 on page EM-141
5. INSTALL ACCELERATOR CONNECTING ROD
6. REFILL WITH COOLANT

FI-108 EFI SYSTEM - Air Induction System
Idle Speed Control (EC) Valve
Rotor
Bl
Q-4
*
0
Rotor
m B2 s2. s4
Fll99lFH6.
,
ON-VEHICLE INSPECTION
CHECK FOR OPERATING SOUND FROM ISC VALVE
Check that there’ is a clicking sound immediately after
stopping the engine.
REMOVAL OF ISC VALVE
1. DRAIN COOLANT
2. DISCONNECT ISC VALVE CONNECTOR
3. DISCONNECT TWO WATER BY-PASS AND AIR
HOSES FROM ISC VALVE
4. REMOVE ISC VALVE
(a) Remove the two bolts.
(b)
Remove ISC valve and gasket.
(cd (7M-GTE)
Remove the seal washer and check valve from the
intake chamber.

EFI SYSTEM - Air Induction System
FI-‘I 09
-.
!
INSPECTION OF ISC VALVE
1. INSPECT RESISTANCE OF ISC VALVE
Using an ohmmeter, measure the resistance between ter-
minal B~l - Sl or S3 and 82 - S2 or S4.
Resistance: Bl -SlorS3 PO-3051
B2-S2orS4, lo-30n
If resistance is not as specified, replace the ISC valve.
2. INSPECT OPERATION OF ISC VALVE
(a) Apply battery voltage to terminals Bl and 82 and
while repeatedly grounding Sl - S2 - 53 - S4 -
S 1 in sequence,.. check that the valve moves toward
the closed position.
(b) Apply battery voltage to terminals Bl and 82 and
while repeatedly grounding S4 - S3 - S2 - Sl -
S4 in sequence, check that the valve moves toward
the open position.
INSPECTION OF CHECK VALVE (7M-GTE only)
INSPECT CHECK VALVE
Inspect the check valve for damage and the diaphragm for
cracks.
If necessary, replace the check valve.
INSTALLATION OF ISC VALVE
1. INSTAiL ISC VALVE
(a) (TM-GTE)
Install the check valve and the seal washer as shown
in the illustration, to the intake chamber.
(b) Install a new gasket to the intake manifold.
(cl Install the ISC valve with the two bolts and one nut.
Torque:
130 kg-cm (9 ft-lb, 13 N-m)
2. INSTALL All? AND TWO WATER BY-PASS HOSES TO
ISC VALVE
3. CONNECT ISC VALVE CONNECTOR
4. REFILL WITH COOLANT

EFI SYSTEM
- Electronic Co?troi System
FI-116
To ignition Switch
(ST11
1 To ECU (STA)
-- : Cold Start Injector Time Switch
._
To ECi
Time Switch
FH37
INSPECTION OF COLD START INJECTOR
TIME SWITCH
1. INSPECT RESISTANCE OF COLD START INJECTOR
TIME SWITCH
(a) Disconnect the connector.
(b) Using an ohmmeter, measure the resistance between
each terminal.
Resistance:
w/ TWC
STA - STJ
25 - 50 Cl below
15°C (59°F)
60 - 85 Cl above
30~ (860~)
STA - Ground 25 - 85 Q
w/o TWC
STA - STJ
20 - 40 n below
30°C (86OFI
40 - 60 i2 above
40°C (104’FI
STA - Ground 20 - 80 $I
If the resistance is not as specified, replace the switch.
2.
IF NECESSARY, REPLACE COLD START INJECTlbN
TIME SWITCH
(a) Drain the coolant.
(b) Using SST, replace the switch with a new gasket.
SST 09814-20010
Torque: 300 kg-cm (22 f&lb, 29 Narn)
(cl Refill with coolant.

I ECU
ul +B +B
r
MS
ECU
Electronic Controlled Unit (ECU)
._
INSPECTION OF ECU
NOTE:
The EFI circuit can be checked by measuring the
resistance and voltage at the wiring connectors of the
ECU. .
1.
(MS)
PREPARATION
(See page FI-58)
2. INSPECT VOLTAGE OF ECU
Check the voltage between each terminal of the wiring
connectors.
0 Turn the ignition switch ON.
0 Measure the voltage at each terminal.
NOTE:
0 Perform all voltage measurements with the connectors
connected.
0 Verify that the battery voltage is 11 V or more when the
ignition switch is ON.
Voltage at ECU Wiring Connectors
I I I Terminals STD Voltage t Condition
I
BATT - El
IG S/W - El
10 - 14
M-REL - El
Ignition S/W ON
.
IDL - E2
VC (VCC) -. E2
VIA - E2 4-6 Throttle valve open
4-6
Ignition S/W ON
0.1 - 1.0 Throttle valve fully closed
4-5 Throttle valve fully open
4-5
Measuring plate fully closed
Ignition S/W ON
0.02 - 0.08
“‘vs Measuring plate fully open
- E2
2-4 Idling
0.3 - 1 .o 3,000 rpm
4-6
*2KS Ignition S/W ON
- E2
2-4 Cranking or running
VC - E2-
THA - E2 4-6 Ignition S/W ON
1 -3 Ignition S/W ON Intake air temperature 20°C (68°F)
THW - E2 0.1 - 1.0 Ignition S/W ON Coolant temperature 80°C (I 76°F)

EFI SYSTEM - Electronic Control. System
FL127
ECU Wiring . .
3.
INSPECT RESISTANCE OF ECU
CAUTION: .-
l Do not touch the ECU terminals.
0 The tester probe should be inserted into the wiring
connector from the wiring side.
Check the resistance between each terminal of the wiring
connectors.
l Disconnect the wiring connectors from the ECU.
0 Measure th.e resistance each terminal.
I
Resistance of ECU Wiring Connectors
Terminals Condition
. I Resistance Ifi)
I
IDL : E2
VTA - E2
VC WCC) - E2 Throttle valve open
Throttle valve fully closed
Throttle valve fully open
Throttle valve fully closed cc
Less than 2,300
3,500 - 10,300
300 - 6,300
200 - 400
*‘VS - E2 Measuring plate fully closed
Measuring plate fully open 20 - 600
20 - 1,200
I *2KS -E2 co I I I
“2E2 +KS -
5,000 - 10,000 I
I
“2VC -E2
10,000 - 15,000
I “2E2 -+VC
I I 5,000 - 10,000 I
THA - E2
THW - E2
Gl,G2 - GO
NE-GO Intake air temperature 20°C (68’FI
. Coolant temperature 80°C (176°F) 2,000 - 3,000
200 - 400
140 - 180
Iscl, I%2 _ +a (8)
ISC3, ISC4 10-30
+2 HAC - E2 2,900 - 4,200
*I 7M-GE only
*2 7M-GTE only