1987 TOYOTA CELICA Service Repair Manual

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.

,_ ,.A< ,..,.
EFI SYSTEM - Air Induction System
FI-105
FI188
Ft162!
FHE
3. INSPECT THROTTLE POSITION SENSOR
(See step 2 -on page Fl-103)
4. IF NECESSARY, ADJUST THROTTLE POSITION
SENSOR
(a) Loosen the two screws of the sensor.
fll6i
(b) Insert a 0.58 mm (0.0228 in.) (7M-GE) or 0.70 mm
(0.0276 in.) (XVI-GTE) thickness gauge, between the
throttle stop screw and lever.
(c) Connect the test probe of an ohmmeter to terminals
IDL and E.
(dd) Gradually turn the sensor clockwise until the ohm-
meter deflects, and secure the sensor with the two
screws.
(e) Recheck the continuity between terminals IDL and
E2.
I Clearance between
I
I lever and stop screw
I Continuity (IDL - E2)
I 7M-GE
! 7M-GTE
I
0.40 mm
I 0.50 mm
(0.0157 in.) (0.0197 in.) Continuity
0.75 mm 0.90 mm
(0.0295 in.1 lo.0354 in.) No continuity

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

FI-110
EFI SYSTEM - Electronic Control System
‘ELECTRONIC CONTROL SYSTEM
._
Lkation of Electronic Control Parts
A
7M-GE
Fuel Pump Solenoid
olenoid Resistor
VSV (fo: FPUK

,r,l-EFI Main Relay
. .
7M-GTE _
Cold Start Injector
SV (for EGR)
Solenoid Resistor