TOYOTA CELICA 1987 Service Repair Manual

IGNITION SYSTEM - On-Vehicle Inspection (‘/M-GE)
IG-lf.
~. .
__
1
8 SST I ffio59
IGOt! i2
INSPECTION OF SPARK PLUGS
(Conventional Tipped Type Spark Plug)
1. REMOVE SPARK PLUGS
(a) Remove the high-tension cords.
(See page. IG-6)
2.
3.
I
lGOl48
4.
5. (b) Using SST, remove the spark plug.
SST 0915~5-16100
CLEAN SPARK PLUGS
Using a spark plug cleaner or wire brush, clean the spark
plug.
VISUALLY INSPECT SPARK PLUGS
Check the spark plug for electrode wear, threads damage
and insulator damage.
If abnormal, replace the plugs.
Recommended spark plugs:
ND Q20R- U
NGK BCPRGEY
ADJUST ELECTRODE GAP
Carefully bend the outer electrode to obtain the correct
electrode gap.
Correct electrode gap: 0.8 mm (0.031 in.)
INSTALL SPARK PLUGS
(a) Using SST, install and torque the spark plug.
SST 09155-l 6100
Torque : 180 kg-cm (13 ft-lb, 18 Nmrn)
I..

IO-8 IGNITION’SYSTEM - On-Vehicle Inspection (7M-GE)
(Platinum tipped Type Spark Plug)
CAUTION:
l Never use a wire brush for cleaning.
l Never attempt to adjust gap on used plug.
l Spark plugs should be replaced every 80,000 miles
(100,000 km).
Megger
IGOlr 17
1. INSPECT ELECTRODE
(a) If using a megger (insulation resistance meter):
0 Remove the high-tension cords. (See page G-6)
0 Measure the insulation resistance.
Correct insulation resistance: 10 MQ or more
If less than 10 MAI , proceed to step 2.
I . IG01481
IG059
0 Visually inspect the spark plugs.
If the electrode is dry ,.... Okay
If the electrode is wet ..,.. Proceed to step 3
2, REMOVE SPARK PLUGS
(a) Remove the high-tension cords. (See page IS-61
Ib) Using SST, remove the spark plug.
SST 09155-l 6100

IGNITION SYSTEM
- On-Vehicle Inspection (7M-GE)
,“lG-9
16031
0.8 mm (7M-GTE)
1 .I
mm (7M-GE)
VISUALLY INSPECT SPARK PLUGS
Check the spark plug for thread or insulator damage.
If abnormal, replace the plug.
Recommended spark plugs:
7M-GE’ ND
PQ16R ’
NGK BCPR5EPll
7M-GTE ND
PQ20R-P6
NGK BCPRGEP-N8
INSPECT ELECTRODE GAP
Maximum electrode gap:
7M-GE
1.3 mm (0.051 in.)
7M-GTE 1.0 mm (0.039 in.)
If the gap is greater than maximum, replace the plug.
Correct electrode gap of new plug:
7M-GE
1.1 mm (0.043 in.)
7M-GTE 0.8 mm (0.031 in.)
If adjusting the gap of a new plug, bend only the base of
5. CLEAN SPARK PLUGS
6. the ground electrode, do not touch the tip.
If the electrode has traces of wet carbon, allow it to dry
and then clean with a spark plug cleaner.
Air pressure: Below 6 kg/cm2 (85 psi, 588 kPa)
Duration : 20 seconds or less
NOTE: If there are traces of oil, remove it with gasoline
before using the spark plug cleaner.
INSTALL SPARK PLUGS
(a) Using SST, install and torque the spark plug.
SST 09155-l 6100
Torque : 180 kg-cm (13 ft-lb, 18 N*m)
(b) Install the high-tension cords.

16-10 IGNITION SYSTEM - On-Vehicle Inspection (‘IM-GE)
I MA
MS
n
MS
39
i4
-3
INSPECTION OF IGNITION COIL
1. DlSCOtiNECT HIGH-TENSION CORD
(See page IO-61
‘2. INSPECT PRIMARY COIL RESISTANCE
Using an ohmmeter, measure the resistance between the
positive (+I and negative (-1 terminals.
Primary coil resistance (cold): .,
MA 0.24 - 0.30 (n
MS 0.41 - 0.50 rzZ
If the resistance is not as specified, replace the ignition
coil.
3. INSPECT SECONDARY COIL RESISTANCE
Using an ohmmeter, measure the resistance between the
positive (+I terminal and high-tension terminal.
Secondary coil resistance (cold):
MA 9.2- 12.4kfi
MS 10.2 - 13.8 ka
If the resistance is not as specified, replace the ignition
coil.
4. RECONNECT HIGH-TENSION CORD
(See page IG-61
INSPECTION OF IGNITER
(See procedure IG-5)

lGNlTlON S+S
1
EM - On-Vehicle Inspection (‘IM-GE)
INSPECTION 6F DISTRIBUTOR
IG-11
1. lNSPECT AIR GAPS
Using a thickness gauge, measure the gap between the .
signal rotor and pickup coil projection.
Air gap: 0.2 - 0.4 mm (0.008 - 0.016 in.)
If the gap is not as specified, replace’the distributor. NE Pickup
Gl Pickup G2 Pickup
INSPECT PICKUP COILS
Using an ohmmeter, check resistance of the pickup coil.
Gl pickup coil resistance:
61-00 1’40-180fi
G2 pickup coil resistance:
62-G@ 140-18Os1
NE pickup coil resistance:
NE-GO 140-180 0
If the resistance is not as specified, replace the distributor.

IQ-12 IGNITION~.SYSTEM - On-Vehicle Inspection (‘IM-GTE)
. ON-VEHICLE’INSPECTION
(7M-GTE)
SPARK TEST
EM35
3. NOTE: Perform this test to check that voltage is coming
from the ignition coil to spark plug.
DISCONNECT NO.1 AIR CLEANER HOSE
DISCONNECT FOLLOWING CABLES AND ROD:
(a) Accelerator link w/ cable
(b) Accelerator rod
(cl (A/T)
Throttle cable
REMOVE ISC PIPE
(a) Disconnect the six hoses from ISC pipe.
(b) Remove the two bolts and ISC pipe.
REMOVE PCV PIPE WITH HOSES
(a) Remove the oxygen sensor wire from two clamps.
(b) Disconnect the No.4 PCV hose from the PCV pipe.
(c) Remove the two bolts.
(d) Disconnect the PCV pipe with hoses from the
cylinder head covers and throttle body.
:
5. 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.
ic) Remove the intake air connector.

6. REMOVE IGNITION COIL COVER
(a) Remove the oil filler cap.
‘...”
I I
I(30598
Ohmmeter
/
IGO
7. REMOVE IGNITION C0l.L WITH BRACKET
(a) Remove the nut.
(b) Disconnect the No.1 and No.2 high-tension cords
from the ignition coil and clamp.
(cl Remove the ignition coil with bracket and high-ten-
sion cords.
id) Remove the No.1 and No.2 high-tension cords from
the spark plugs.
8.
9. REMOVE SPARK PLUGS
Using SST, remove the spark plug.
SST 09155-16100
PERFORM SPARK TEST
Ia) Install the oil filler cap.
(b) Install the spark plugs to each high-tension cord.
(4 Ground the spark plug.
(d) Disconnect the solenoid resistor and cold start injec-
tor connectors.
(e) See if spark occurs while engine is being cranked.
INSPECTION OF HIGH-TENSION CORDS
INSPECT HIGH-TENSION CORD RESISTANCE
Using an ohmmeter, measure the resistance.
Maximum resistance: 25 kfl per cord
If resistance exceeds maximum, check the terminals.
If necessary, replace the high-tension cord.
INSPECTION OF SPARK PLUGS
(See pages IG-7, 8)

IG-14 IGNITION.SYSTEM - On-Vehicle Inspection (7M-GTE)
INSPECTIoN OF IGNlTlOhi COIL-
1. INSPECT POWER SOURCE LINE
(a) Disconnect the high-tension cord from the ignition
coil.
(b) Disconnect the ignition coil connectors.
(c) Turn the ignition switch ON,
Voltmeter
ccl
0
!I
0 0
dz 160668
I IGOt
I - IG067
I \ ’ IG087'
(d) Using a voltmeter, measure the voltage between ter-
minal 1 and body ground.
Voltage: Approx. 12 V
2. INSPECT PRIMARY COIL RESISTANCE
Using an ohmmeter, measure the resistance between the
positive (+I and negative (-1 terminals.
Primary coil resistance (cold): 0.3 - 0.5 R
NOTE: Because is inside the coil, it is impossible to
measure secondary coil resistance.
3. INSPECT IGNITION COIL GROUND
Using an ohmmeter, check that there is no continuity be-
tween the ignition coil terminal and body ground.
4. IF NECESSARY, REPLACE IGNITION COIL
Using a hexagon key wrench 3 mm (0.12 in.), replace the
ignition coil.

IGNITION-SYSTEM - On-V?hicle Inspection (7M-GTE)
IO-1 5
5. INSTALL IGNITION COIL WITH BRACKET .
(a) Connect the ignition coil connector.
(b) install the high-tension cords as shown in the illustra- ’
tion; No.5 and No.6, No.3 and No.4, and No.1 and
No.2.
(c) Install and torque the nut.
Torque : 55 kg-cm (48 in.-lb, 5.4 Nmrn)
CAUTION: Do not over tighten the nut.
IGOB,
12
- 6. INSTALL IGNITION COIL COVER
(a) Remove the oil filler cap.
(b) Install the ignition coil cover with the five nuts.
(c) install the oil filler cap.
7. INSTALL INTAKE AIR CONNECTOR
(a) Install the intake air connector.
(b) Install and tighten the two bolts.
(c) Tighten the clamp.
Id) Connect the air valve hose.

IO-16 IGNITION SYSTEM - On-Vehicle Inspection (7M-GTE)
.8. INSTALL PCi/ PIPE WITH HOSES
(a) Install the PCV pipe with hoses to throttle body and
cylinder head cover.
(b) Install and tighten the two bolts.
(c) Connect the No.4 PCV hose.
(d) Install the oxygen sensor wire to the two PCV pipe
clamps.
9. INSTALL ISC PIPE
(a) Install the ISC pipe with the two bolts.
(b) Connect the six hoses to ISC pipe.
10. CONNECT FOLLOWING CABLES AND ROD:
(a) (A/T)
Throttle cable
(b) Accelerator rod
(cl Accelerator link w/ cable
11. CONNECT NO.1 AIR CLEANER HOSE
I