TOYOTA SUPRA 1995 Service Repair Manual

3. REMOVE ROTOR
Remove the 2 screws and rotor.
ASSEMBLY HINT: Align the hollow of the signal rotor with the
protrusion of the rotor.
DISTRIBUTOR INSPECTION
INSPECT SHAFT
Turn the shaft and check that it is not rough or worn.
If it feels rough or worn, replace the distributor housing as-
sembly.
DISTRIBUTOR INSTALLATION
1. REMOVE NO.3 TIMING BELT COVER
(a) Remove the oil filler cap.
(b) Using a 5 mm hexagon wrench, remove the 6 bolts and timing
belt cover.
2. SET NO.1 CYLINDER TO TDC/COMPRESSION
(a) Turn the crankshaft pulley, and align its groove with timing
mark ºOº of the No.1 timing belt cover. IG±16
± IGNITION SYSTEM(2JZ±GE)

(b) Check that the timing marks of the camshaft timing pulleys
and No.4 timing belt cover are aligned.
If not, turn the crankshaft 1 revolution (360°) and align the
mark as above.
3. INSTALL DISTRIBUTOR
(a) Install a new O±ring to the distributor housing.
(b) Apply a light coat of engine oil on the O±ring.
(c) Align the marks of the drive gear and distributor housing.
(d) Insert the distributor, aligning the protrusion of the flange with
that of the stud bolt on the cylinder head.
(e) Install the distributor with the nut. Lightly tighten the nut.
4. REINSTALL NO.3 TIMING BELT COVER
5. CONNECT HIGH±TENSION CORDS TO DISTRIBUTOR
Connect the 7 high±tension cords to the distributor.
Firing order:
1 ± 5 ± 3 ± 6 ± 2 ± 4
6. CONNECT DISTRIBUTOR CONNECTOR
7. ADJST IGNITION TIMING
(See ignition timing inspection and adjustment)
± IGNITION SYSTEM(2JZ±GE)IG±17

SERVICE SPECIFICATIONS
SERVICE DATA
 Firing order ± 1 ± 5 ± 3 ± 6 ± 2 ± 4 
 High±tension
cord 
 Resistance Limit 
 25 k
per cord
 
 
 
 
Spark plug 
 
 
 
Recommended spark plug ND
NGK
Correct electrode gap for new plug
Maximum electrode gap for used plug 
 
 
 
PK16R11
BKR5EP11
1.1 mm (0.043 in.)
1.3 mm (0.051 in.)
 
 
 
 
Ignition coil 
 
 
 
Primary coil resistance at cold
at hot
Secondary coil resistance at cold
at hot 
 
 
 
0.36±0.55

0.45±0.65

9.0±15.4 k

11.4±18.1 k

 
 
 
 
 
 
Distributor 
 
 
 
 
 
Air gap
Pickup coil resistance at cold G1±G

G2±G

NE±G

at hot G1±G

G2±G

NE±G
 
 
 
 
 
 
0.2±0.5 mm (0.008±0.020 in.)
125±200

125±200

155±250

160±235

160±235

190±290

TORQUE SPECIFICATIONS
 Part tightened NVm kgfVcm ftVlbf
 Spark plug x Cylinder head 18 180 13
IG±18± IGNITION SYSTEM2JZ±GE

(2JZ±GTE)
PRECAUTION
1. With a tachometer connected to the system, connect the
tester probe of the tachometer to terminal IG
of the
DLC1.
2. With a timing light connected to the system, connect the
tester probe to the green wire of the igniter
3. As some tachometers are not compatible with this
ignition system, we recommend that you confirm the
compatibility of your unit before use.
4. Never allow the tachometer terminals to touch ground as
it could result in damage to the igniter and/or ignition
coil.
5. Do not disconnect the battery while the engine is
running.
6. Check that the igniter is properly grounded to the body.
± IGNITION SYSTEM2JZ±GTEIG±19

PREPARATION
SST(SPECIAL SERVICE TOOLS)
09240±00020Wire Gauge Set
RECOMMENDED TOOLS
09082±00050TOYOTA Electrical Tester Set


09200±00010Engine Adjust Kit

EQUIPMENT
 Megger insulation resistance meter Spark plug 
 Spark plug cleaner
 
 
 Thermometer 
IG±20± IGNITION SYSTEM2JZ±GTE

ON±VEHICLE INSPECTION
SPARK TEST
CHECK THAT SPARK OCCURS
(a) Remove the ignition coil. (See ignition coil removal)
(b) Remove the spark plug.
(c) Install the spark plug to the ignition coil, and connect the
ignition coil connecter.
(d) Ground the spark plug.
(e) Check if spark occurs while engine is being cranked.
HINT: To prevent gasoline from being injected from injectors
during this test, crank the engine for no more than 1±2 se-
conds at time.
If the spark does not occur, do the test as follows:
SPARK TEST
CHECK CONNECTION OF IGNITION COIL, IGNITER
CHECK POWER SUPPLY TO IGNITION COIL AND
IGNITER
1. Turn ignition switch to ON.
2. Check that there is battery voltage at
ignition coil positive (+) terminal.
CHECK RESISTANCE OF IGNITION COIL(See page IG±23)Resistance: Cold Hot
Primary 0.54 ± 0.84
0.68 ± 0.98

CHECK RESISTANCE OF CAMSHAFT AND
CRANKSHAFT POSITION SENSOR
(See page IG±24)Resistance: Cold Hot
NIPPONDENSO 835 ± 1,400
1,060 ± 1,645

AISAN 985 ± 1,600
1,265 ± 1,890

CHECK IGT SIGNAL FROM ECM(See page EG±519)
TRY ANOTHER IGNITER
Connect securely.
Check wiring between ignition switch
to ignition coil and igniter.
Replace the ignition coil.
Replace the camshaft and crankshaft position
sensor.
Check wiring between ECM,and igniter, and
then try another ECM.
ADJUST IGNITION TIMING
(See ignition timing inspection and adjustment)
± IGNITION SYSTEM2JZ±GTEIG±21

SPARK PLUGS INSPECTION
NOTICE:
wNever use a wire brush for cleaning.
wNever attempt to adjust the electrode gap on used a spark
plug.
wSpark plugs should be replaced every 100,000 km (60,000
miles).
1. REMOVE IGNITION COILS ASSEMBLIES
(See ignition coils removal)
2. INSPECT ELECTRODE
Using a megger (insulation resistance meter), measure the
insulation resistance.
Standard correct insulation resistance:
10 M
or more
If the resistance is less than specified, proceed to step 4.
HINT: If a megger is not available, the following simple meth-
od of inspection provides fairly accurate results.
Simple Method:
(a) Quickly race the engine 5 times to 4,000 rpm.
(b) Remove the spark plug.
(c) Visually check the spark plug.
If the electrode is dry...OK
If the electrode is wet...Proceed to step 4
(d) Reinstall the spark plug.
3. REMOVE SPARK PLUGS
4. VISUALLY INSPECT SPARK PLUGS
Check the spark plug for thread damage and insulator dam-
age.
If abnormal, replace the spark plug.
Recommended spark plug:
ND
PK20R11
NGK
BKR6EP11
5. INSPECT ELECTRODE GAP
Maximum electrode gap for used spark plug:
1.3 mm (0.051 in.)
Correct electrode gap for new spark plug:
1.1 mm (0.043 in.)
NOTICE: If adjusting the gap of a new spark plug, bend only
the base of the ground electrode. Do not touch the tip. Never
attempt to adjust the gap on the used plug.
IG±22± IGNITION SYSTEM(2JZ±GTE)

6. CLEAN SPARK PLUGS
If the electrode has traces of wet carbon, allow it to dry and
then clean with a spark plug cleaner.
Air pressure:
Below 588 kPa (6 kgf/cm
2, 85 psi)
Duration:
20 seconds or less
HINT: If there are traces of oil, remove it with gasoline before
using the spark plug cleaner.
7. REINSTALL SPARK PLUGS
Torque: 18 NVm (180 kgfVcm, 13 ftVlbf)
8. REINSTALL IGNITION COILS ASSEMBLIES
(See ignition coils installation)
IGNITION COIL INSPECTION
NOTICE: ºColdº and ºHotº in the following sentences express
the temperature of the coils themselves. ºColdº is from ±105C
(145F) to 505C (1225F) and ºHotº is from 505C (1225F) to 1005C
(2125F).
1. REMOVE NO.3 TIMING BELT COVER
2. DISCONNECT IGNITION COIL CONNECTORS
3. INSPECT PRIMARY COIL RESISTANCE
Using an ohmmeter, measure the resistance between the
positive (+) and negative (±) terminals.
Primary coil resistance:
Cold
0.54 ± 0.84

Hot
0.68 ± 0.98

If the resistance is not as specified, replace the ignition coil.
4. RECONNECT IGNITION COIL CONNECTORS
5. REINSTALL NO.3 TIMING BELT COVER
± IGNITION SYSTEM(2JZ±GTE)IG±23

CAMSHAFT POSITION SENSORS
INSPECTION
NOTICE: ºColdº and ºHotº in the following sentences express
the temperature of the sensors themselves. ºColdº is from
±105C (145F) to 505C (1225F) and ºHotº is from 505C (1225F) to
1005C (2125F).
1. DISCONNECT CAMSHAFT POSITION SENSOR
CONNECTORS
2. INSPECT CAMSHAFT POSITION SENSOR RESISTANCE
Using an ohmmeter, measure the resistance between termi-
nals.
Resistance:
Cold
NIPPONDENSO
835±1,400

AISAN
985±1,600

Hot
NIPPONDENSO
1,060±1,645

AISAN
1,265±1,890

If the resistance is not as specified, replace the camshaft
position sensor.
3. RECONNECT CAMSHAFT POSITION SENSOR
CONNECTORS IG±24
± IGNITION SYSTEM(2JZ±GTE)

CRANKSHAFT POSITION SENSOR
INSPECTION
NOTICE: ºColdº and ºHotº in the following sentences express
the temperature of the sensors themselves. ºColdº is from
±105C (145F) to 505C (1225F) and ºHotº is from 505C (1225F) to
1005C (2125F).
1. REMOVE NO.2 AIR TUBE FOR CAC
2. DISCONNECT CRANKSHAFT POSITION SENSOR
CONNECTOR
3. INSPECT CRANKSHAFT POSITION SENSOR
RESISTANCE
Using an ohmmeter, measure the resistance between termi-
nals.
Resistance:
Cold
NIPPONDENSO
835±1,400

AISAN
985±1,600

Hot
NIPPONDENSO
1,060±1,645

AISAN
1,265±1,890

If the resistance is not as specified, replace the crankshaft
position sensor.
4. RECONNECT CRANKSHAFT POSITION SENSOR
CONNECTOR
5. REINSTALL NO.2 AIR TUBE FOR CAC
IGNITER INSPECTION
(See procedure Spark Test on page IG±22)
± IGNITION SYSTEM(2JZ±GTE)IG±25