1997 TOYOTA SUPRA check engine light

Input Signal
Indicator Light
Blinking Pattern
Clutch switch
OFF (Depress
clutch pedal)
LightON
OFFSW ON
SW OFF
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-697
925 Author
: Date
:
1997 SUPRA (RM502U)
Clutch Switch Circuit
CIRCUIT DESCRIPTION
When the clutch pedal is depressed, the clutch switch sends a signal to the cruise control ECU. When the
signal is input to the cruise control ECU during cruise control driving, the cruise control ECU cancels cruise
control.
WIRING DIAGRAM
Refer to park/neutral position switch circuit on page DI-694.
INSPECTION PROCEDURE
1 Check starter operation.
CHECK:
Check that the starter operates normally and that the engine starts.
NG Proceed to engine troubleshooting
(2JZ-GE: See page DI-24,
2JZ-GTE: See page DI-169).
OK
2 Input signal check.
PREPARATION:
See input signal check on page DI-662.
CHECK:
Check the indicator light when the clutch pedal is depressed.
OK:
The indicator light goes off when the clutch pedal is
depressed.
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI-671).
NG
DI4Y0-01

15A
HEAD (
RH)
(
USA)
25
6
1
IF2 13 IF1 6IB1 2
IF2 1IF24IF114
IE1 1IE12IE13
BP1 5 BP13BP11 II1 24 II1 19 A 2A 16 A15 B6
A 7A6A3A9A8B8A10 A11 A13
II1 29
SLIP
CRUISE
HIGH BEAM
WATER TEMP.
FUEL
FUEL
TACHO
IJ213
IE EC IFI 3 FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
IJ29
EXT
I 4
E10
C 9
P 2
COMBINATION METER FROM HEADLIGHT HI RH
FUEL SENDERIGNITER
ENGINE CONTROL MODULE
CLUTCH START
SW
PARK/NEUTRAL POSITION
SW Y- G
Y- B
BR BRY- B Y- GBR Y- RR- LO W
Y- G
Y- B
BR
B- W B- W
B- W BRBR Y- L (
*3) R- L W- BW
O TO THROTTLE E CU
TO CRUISE CONTROL
ECU
TO DI MME R SW
[COMB. SW]
ENGINE COOLANT TEMP. SENDER
LH
RH TURNB
(
A/T)
B
(
M/T)B- W
(
M/T) R- W
(
*1)
B- W
G- B
G- Y R- W R- W
R- W
G- B
G- YB- WB
B BR
BR
(
*4)
(
*3) (
*1)
BULB
CHECK RELAY
123416FROM TURN SIGNAL SW
[COMB. SW]
1 2
(
*2)
E 4
C
C10 , C11
, C1 2
BA
(
*3)
1I 4
B (
*3)
Y- R (
*4)
(
A/ T)
(
A/T)(
A/T) (
*2)
TACO
F14
2
P
N
1E 19 1E14 1H 11 1H7
7. 5A
ST
1K 4
220
COMBINATION METER

EM2534
Overall Length
EM0255
P02127
45°
Carbide
Cutter
Z00373
Width
P03966
45°
15°
Width EM-38
- ENGINE MECHANICAL (2JZ-GTE)CYLINDER HEAD
1143 Author
: Date
:
1997 SUPRA (RM502U)
(d) Check the valve overall length.
Standard overall length:
Intake 98.29 - 98.79 mm (3.8697 - 3.8894 in.)
Exhaust 98.84 - 99.34 mm (3.8913 - 3.9110 in.)
Minimum overall length:
Intake 98.19 mm (3.8657 in.)
Exhaust 98.74 mm (3.8874 in.)
If the overall length is less than minimum, replace the valve.
(e) Check the surface of the valve stem tip for wear.
If the valve stem tip is worn, resurface the tip with a grinder or
replace the valve.
NOTICE:
Do not grind off more than the minimum overall length.
11. INSPECT AND CLEAN VALVE SEATS
(a) Using a 45° carbide cutter, resurface the valve seats.
Remove only enough metal to clean the seats.
(b) Check the valve seating position.
Apply a thin coat of prussian blue (or white lead) to the
valve face. Lightly press the valve against the seat. Do not
rotate the valve.
(c) Check the valve face and seat for the following:

If blue appears 360° around the face, the valve is
concentric. If not, replace the valve.

If blue appears 360° around the valve seat, the
guide and face are concentric. If not, resurface the
seat.

Check that the seat contact is in the middle of the
valve face with the following width:
Intake 1.0 - 1.4 mm (0.039 - 0.055 in.)
Exhaust 1.2 - 1.6 mm (0.047 - 0.063 in.)
If not, correct the valve seats as follows:

If the seating is too high on the valve face, use 15°
and 45° cutters to correct the seat.

P12308
SST
P02269
EM-46
- ENGINE MECHANICAL (2JZ-GTE)CYLINDER HEAD
1151 Author
: Date
:
1997 SUPRA (RM502U)
(c) Using SST, compress the valve spring and place the 2
keepers around the valve stem.
SST 09202-70020 (09202-00010)
(d) Using a plastic-faced hammer, lightly tap the valve stem
tip to ensure a proper fit.
3. INSTALL VALVE LIFTERS AND SHIMS
(a) Install the valve lifter and shim.
(b) Check that the valve lifter rotates smoothly by hand.
4. INSTALL EGR COOLER
Install a new gasket and the EGR cooler with the 8 bolts.
Torque: 8.8 N´m (90 kgf´cm, 78 in.´lbf)
5. INSTALL CAMSHAFT POSITION SENSORS
Install the gasket and sensor with the 2 bolts.
Torque: 8.8 N´m (90 kgf´cm, 78 in.´lbf)
6. INSTALL ENGINE HANGERS AND GROUND STRAP
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)

EM0AM-02
P02111
Z02387
10 mm
Bi-Hexagon
Wrench
12
14 1013
11 84
6125
379
P02424
Painted Mark
Front
P02425
Painted Mark
90°
90°90°
90°
- ENGINE MECHANICAL (2JZ-GTE)CYLINDER HEAD
EM-47
1152 Author
: Date
:
1997 SUPRA (RM502U)
INSTALLATION
1. PLACE CYLINDER HEAD ON CYLINDER BLOCK
(a) Place a new cylinder head gasket in position on the cylin-
der block.
NOTICE:
Be sure to install it correctly.
(b) Place the cylinder head in position on the cylinder head
gasket.
2. INSTALL CYLINDER HEAD BOLTS
HINT:

The cylinder head bolts are tightened in 2 progressive
steps (steps (c) and (f)).

If any of bolts break or deform, replace them.
(a) Apply a light coat of engine oil on the threads and under
the heads of the cylinder head bolts.
(b) Install the 14 plate washers to each cylinder head bolt.
(c) Using a 10 mm bi-hexagon wrench, uniformly tighten the
cylinder head bolts, in several passes, in the sequence
shown.
Torque: 34 N´m (350 kgf´cm, 25 ft´lbf)
If any of the bolts do not meet the torque specification, replace
the bolt.
(d) Mark the front of the cylinder head bolt head with paint.
(e) Retighten the cylinder head bolts by 90° in the numerical
order shown in the illustration on previous page.
(f) Retighten cylinder head bolts by an additional 90° shown
in the illustration on previous page.
(g) Check that the painted mark is now turned to the rear.

P02123
P02108
P02069
P02278
EM-78
- ENGINE MECHANICAL (2JZ-GTE)CYLINDER BLOCK
1183 Author
: Date
:
1997 SUPRA (RM502U)
28. CHECK FIT BETWEEN PISTON AND PISTON PIN
Try to move the piston back and forth on the piston pin.
If any movement is felt, replace the piston and pin as a set.
29. REMOVE PISTON RINGS
(a) Using a piston ring expander, remove the 2 compression
rings.
(b) Remove the 2 side rails and oil ring expander by hand.
HINT:
Arrange the piston rings in correct order only.
30. DISCONNECT CONNECTING ROD FROM PISTON
(a) Using a small screwdriver, remove the 2 snap rings.
(b) Gradually heat the piston to about 80°C (176°F).
(c) Using a plastic-faced hammer and brass bar, lightly tap
out the piston pin and remove the connecting rod.
HINT:

The piston and pin are a matched set.

Arrange the pistons, pins, rings, connecting rods and
bearings in the correct order.

P02440
90°Painted Mark
90°
Z02418
Front Mark
(Cavity)
Front
P04479
P02426
P02419
Painted
Mark Front
- ENGINE MECHANICAL (2JZ-GTE)CYLINDER BLOCK
EM-91
1196 Author
: Date
:
1997 SUPRA (RM502U)
(c) Mark the front of the main bearing cap bolt head with
paint.
(d) Retighten the main bearing cap bolts 90° in the numerical
order shown above.
(e) Check that the painted mark is now at a 90° angle to the
front.
(f) Check that the crankshaft turns smoothly.
10. CHECK CRANKSHAFT THRUST CLEARANCE
(See page EM-71)
11. INSTALL PISTON AND CONNECTING ROD
ASSEMBLIES
Using a piston ring compressor, push the correctly numbered
piston and connecting rod assemblies into each cylinder with
the front mark of the piston facing forward.
12. PLACE CONNECTING ROD CAP ON CONNECTING
ROD
(a) Match the numbered connecting rod cap with the con-
necting rod.
(b) Install the connecting rod cap with by aligning the dowel
pin to the corresponding hole.
13. INSTALL CONNECTING ROD CAP BOLTS
HINT:

The connecting rod cap bolts are tightened in 2 progres-
sive steps (steps (b) and (d)).

If any of the connecting rod bolts break or deform, replace
them.
(a) Apply a light coat of engine oil on the threads and under
the heads of the connecting rod cap bolts.
(b) At first, install and alternately tighten the bolts of the con-
necting rod cap in several passes.
Torque: 29 N´m (300 kgf´cm, 22 ft´lbf)
If any one of the connecting rod cap bolts does not meet the
torque specification, replace the cap bolt.
(c) Mark the front of the connecting rod cap bolt with paint.

EM0AA-02
Q08242
TOYOTA Hand-Held Tester
DLC3
P11288
DLC1
TE1
E1
P11943
Green Lead
Wire
- ENGINE MECHANICAL (2JZ-GTE)IGNITION TIMING
EM-1 1
111 6 Author
: Date
:
1997 SUPRA (RM502U)
IGNITION TIMING
INSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
2. CONNECT TOYOTA HAND-HELD TESTER OR OBDII
SCAN TOOL
(a) Connect the TOYOTA hand-held tester or OBDII scan
tool to the DLC3.
(b) Please refer to the TOYOTA hand-held tester or OBDII
scan tool operator's manual for further details.
3. CONNECT TIMING LIGHT TO ENGINE
4. CHECK IDLE SPEED
(a) Race the engine speed at 2,500 rpm for approx. 90 se-
conds.
(b) Check the idle speed.
Idle speed: 650 ± 50 rpm
5. INSPECT IGNITION TIMING
(a) Using SST, connect terminals TE1 and E1 of the DLC1.
SST 09843-18020
(b) Open the igniter connector cover and remove the green
lead wire.
(c) Connect the timing light clip to the green lead wire.
NOTICE:

Use a timing light that can detect the primary signal.

After finishing the inspection, make sure the lead wire
is stored inside the connector cover.
(d) Using a timing light, check the ignition timing.
Ignition timing: 10 ± 2° BTDC @ idle
(Transmission in neutral position)