1997 TOYOTA SUPRA charging

R05894 AB0117
H00001
P squibAirbag Sensor
Assembly
D squib
Spiral
Cable LOCK
AB0119
W02766H00041
Airbag Sensor Assembly
ON
ACC
IG2
(-)(+)
DI-596
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
824 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURES
1 Preparation.
PREPARATION:
(a) Disconnect negative (-) terminal cable from the battery,
and wait at least 90 seconds.
(b) Remove the steering wheel pad (See SR Section).
(c) Disconnect the connector of front passenger airbag as-
sembly (See page RS-21).
(d) DIsconnect the connector of airbag sensor assembly
(See page RS-33).
CAUTION:
Store the steering wheel pad with the front surface facing
upward.
2 Check source voltage.
PREPARATION:
(a) Connect negative (-) terminal cable to the battery.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage at IG2 or ACC on sensor and operate elec-
tric system. (defogger, wiper, headlight, heater blower, etc)
OK:
Voltage: 10 - 14 V
NG Check the harness between battery and airbag
sensor assembly, and check the battery and
charging system.
OK

123
LIG S B
IC REGULATOR
BW
W
B- O Y- G
Y- G
Y
WY
W
BATTERY
GENERATORAAA B 123 1 II1 34 II123
W
W
A G 1 , G 2B FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
EA2 4
EA3 2(
*1)
(
*2)
W
W
W
I14
Y- G Y- G
Y- G FROM
COMBINATION
METERCHARGE WARNING LIGHT
[ TELL TAL E LI GHT RH] T 6 Y- G
TO DAYTIME RUNNING
LIGHT RELAY(
MAIN)
1E 81E1210A
GA UGE 7. 5A
IGN
22
7. 5A
ALT- S 22
11 120A
ALT
2A 1
68
CHARGING*1 : 2JZ- GTE
*2 : 2JZ- GE

127
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS TO TERMINAL 18 OF THE FRONT WIPER AND WASHER SW,
TERMINAL 2 OF THE WASHER MOTOR AND TERMINAL 6 OF THE FRONT WIPER MOTOR FROM THE WIPER FUSE.
1. LOW SPEED POSITION
WITH THE WIPER SW TURNED TO LOW POSITION, THE CURRENT FLOWS FROM TERMINAL 18 OF THE FRONT WIPER AND
WASHER SW TO TERMINAL 7 " TERMINAL 3 OF THE FRONT WIPER MOTOR " TERMINAL 1 " TO GROUND AND CAUSES THE
WIPER MOTOR TO RUN AT LOW SPEED.
2. HIGH SPEED POSITION
WITH THE WIPER SW TURNED TO HIGH POSITION, THE CURRENT FLOWS FROM TERMINAL 18 OF THE FRONT WIPER AND
WASHER SW "TERMINAL 13 " TERMINAL 2 OF THE FRONT WIPER MOTOR" TERMINAL 1 " TO GROUND AND CAUSES TO THE
WIPER MOTOR TO RUN AT HIGH SPEED.
3. INT POSITION
WITH THE WIPER SW TURNED TO INT POSITION, THE RELAY OPERATES AND THE CURRENT WHICH IS CONNECTED BY RELAY
FUNCTION FLOWS FROM THE TERMINAL 18 OF THE FRONT WIPER AND WASHER SW" TERMINAL 16" TO GROUND. THIS
FLOWS OF THE CURRENT OPERATES THE INTERMITTENT CIRCUIT AND THE CURRENT FLOWS FROM TERMINAL 18 OF THE
FRONT WIPER AND WASHER SW " TERMINAL 7 " TERMINAL 3 OF THE FRONT WIPER MOTOR " TERMINAL 1 " TO GROUND
AND FUNCTIONS.
THE INTERMITTENT OPERATION IS CONTROLLED BY A CONDENSER'S CHARGED AND DISCHARGED FUNCTION INSTALLED IN
RELAY AND INTERMITTENT TIME IS CONTROLLED BY A TIME CONTROL SW TO CHARGE THE CHARGING TIME OF THE
CONDENSER.
4. MIST POSITION
WITH THE WIPER SW TURNED TO MIST POSITION, THE CURRENT FLOWS FROM TERMINAL 18 OF THE FRONT WIPER AND
WASHER SW "TERMINAL 7 "TERMINAL 3 OF THE FRONT WIPER MOTOR " TERMINAL 1 "TO GROUND AND CAUSES THE
WIPER MOTOR TO RUN AT LOW SPEED.
5. WASHER CONTINUOUS OPERATION
WITH THE WASHER SW TURNED TO ON, THE CURRENT FLOWS THROUGH TERMINAL 2 OF THE WASHER MOTOR "TERMINAL
1" TERMINAL 8 OF THE FRONT WIPER AND WASHER SW " TERMINAL 16 " TO GROUND AND CAUSES TO THE WASHER MOTOR
TO RUN, AND WINDOW WASHER IS JET. THIS CAUSES THE CURRENT TO FLOW WASHER CONTINUOUS OPERATION CIRCUIT IN
TERMINAL 18 OF THE FRONT WIPER AND WASHER SW " TERMINAL 7 " TERMINAL 3 OF THE FRONT WIPER MOTOR" TERMINAL
1 " TO GROUND AND FUNCTION.
C14 FRONT WIPER AND WASHER SW [COMB. SW]
16-GROUND : ALWAYS CONTINUITY
18-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
7-GROUND : APPROX. 12 VOLTS WITH THE WIPER AND WASHER SW AT LOW POSITION
: APPROX. 12 VOLTS EVERY APPROX. 1 TO 10 SECONDS INTERMITTENTLY WITH THE WIPER SW AT INT POSITION
4-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW ON UNLESS THE WIPER MOTOR AT STOP POSITION
13-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW ON AND THE WIPER AND WASHER SW AT HIGH POSITION
F 9 FRONT WIPER MOTOR
5-6 : CLOSED UNLESS WIPER MOTOR AT STOP POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1428F 926 (2JZ-GE)W 227 (2JZ-GTE)
F 924 (2JZ-GTE)W 125 (2JZ-GTE)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1A20ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1H
1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IB236ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
SYSTEM OUTLINE
SERVICE HINTS

205
WHEN THE IGNITION SW IS TURNED ON, CURRENT FLOWS TO TERMINAL 2 OF THE WASHER MOTOR, TERMINAL 1
OF THE REAR WIPER MOTOR AND RELAY THROUGH THE WIPER FUSE.
1. REAR WIPER NORMAL OPERATION
WITH THE IGNITION SW TURNED ON AND REAR WIPER AND WASHER SW TURNED ON, THE CURRENT FLOWING TO
TERMINAL 1 OF THE REAR WIPER RELAY FLOWS TO TERMINAL 3 OF THE RELAY "TERMINAL 1 OF THE REAR
WIPER AND WASHER SW "TERMINAL 16 "TO GROUND. THUS, THE RELAY COIL IS ACTIVATED AND THE
CURRENT TO TERMINAL 1 OF THE RELAY FLOWS TO "TERMIANL LH " TERMINAL LH OF THE REAR WIPER
MOTOR "MOTOR "TO GROUND AND CAUSES THE MOTOR TO OPERATE THE WIPER.
2. REAR WIPER INTERMITTENT OPERATION
WHEN THE IGNITION SW IS ON AND THE REAR WIPER AND WASHER SW IS TURNED TO INT POSITION, CURRENT
FLOWING TO TERMINAL 1 OF THE REAR WIPER MOTOR AND RELAY FLOWS TO TERMINAL 2 OF THE RELAY "
TERMINAL 10 OF THE REAR WIPER AND WASHER SW "TERMINAL 16 "GROUND.
THIS CAUSES THE MOTOR TO OPERATE (THE POINT CHANGES) AND THE INTERMITTENT CIRCUIT OF THE RELAY
OPERATES. INTERMITTENT OPERATION OF THE CIRCUIT IS CONTROLLED BY THE CHANGING AND DISCHARGING
OF THE CONDENSER INSTALLED INSIDE THE RELAY.
3. WASHER OPERATION
WITH THE IGNITION SW TURNED ON AND THE REAR WIPER AND WASHER SW TURNED TO ON POSITION, WHEN
THE WIPER SW IS TURNED FURTHER, THE CURRENT FLOWING TO TERMINAL 2 OF THE WASHER MOTOR FLOWS
TO TERMINAL 3 OF THE MOTOR "TERMINAL 2 OF THE REAR WIPER AND WASHER SW "TERMINAL 16 "TO
GROUND, SO THAT THE WASHER MOTOR ROTATES AND THE WINDOW WASHER EJECTS THE SPRAY, ONLY WHILE
THE SWITCH IS FULLY TURNED.
WHEN THE WIPER SW IS OFF AND THEN TURNED TO WASHER ON (WIPER OFF SIDE), ONLY THE WASHER
OPERATES.
W1 WASHER MOTOR
2-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
3-GROUND : CONTINUITY WITH THE WASHER SW TURNED ON
R15 REAR WIPER MOTOR AND RELAY
1-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
2-GROUND : CONTINUITY WITH THE REAR WIPER SW AT INT POSITION
3-GROUND : CONTINUITY WITH THE REAR WIPER SW AT ON POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1428W125 (2JZ-GTE)
R1530W127 (2JZ-GE)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1A20ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1H
1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
()
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IB236ENGINE ROOM MAIN WIRE AND COWL WIRE (LET KICK PANEL)
IC236FLOOR NO. 2 WIRE AND COWL WIRE (LEFT KICK PANEL)
BM140BACK DOOR NO. 1 WIRE AND FLOOR NO. 2 WIRE (LEFT SIDE OF PACKAGE TRAY TRIM)
BO140BACK DOOR NO. 2 WIRE AND BACK DOOR NO. 1 WIRE (BACK DOOR UPPER LEFT)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IE36LEFT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E932ENGINE ROOM MAIN WIREE2134ENGINE ROOM MAIN WIRE
SYSTEM OUTLINE
SERVICE HINTS

1
234
1 SUPRA ELECTRICAL WIRING DIAGRAM
2ACC
IG1
ST2IG2 AM1 4
8 6 7AM2
222
221J 6 1J 4
2 1
5 3
21K 4
2A22 1
2IJ1IJ2131J 31J5
1E 81E12
34 II1 23 II1
2EA3EA 2 4
1B
B
A
A
A L
IG
S IJ29 3EA1
4IB1 2
1
B
1
A I19
IGNI TION SW
5 0A AM1
( USA)
6 0A AM1
(
Can ada)
50A
MAI NSTARTER
RE LAY
7. 5A
ALT- S120 A
AL T30A
AM2
BA TTERY[STARTE RTo Thef t Deterren t an d
Doo r Lock Con trol EC U
<14- 3>
T o E ng i ne Co nt r o l
Mo dule < 3- 7> < 4 - 8> To B ulb Chec k Rela y
[Comb. Meter] < 26- 6> C 9
CLUT CH
START SW
(M/ T)7. 5 A
ST
P
NP 2
PA RK/NE UTRAL
POSITION SW
(A/T)7. 5A
IGN10 A
GAUGE
T 6
CHA RGE WARNIN G LIG HT
[TELLTALE LIGHT RH]
(
*1)
(
*2)
1
2
3
G 1 B , G 2 A
GENE RATOR
1
123 B G 1 AG 2 B LACK GEN ERAT OR S 2 A , S 3 B
1
1 STARTER
A S 2 BS 3 BL ACK
W
W
W WW- R W- RBB BB-WB-WBB B
B L- O
B B L- OB
B B- O Y - GY W
B- Y
B- W
W W
W W Y- GY W
Y- G B- W B- WBB-W
B
B
(
A/T)
(
M/T) (
M/T) (
M/T) (
M/T)
(
A/T) (
A/T)(
A/ T) (
A/T)
(
M/T)3
6
22 22
11 111
212
5 B- Y
B- R B- W
B- R
11EA3EA2 1(
*1)
(
*2)
B
* 2 : 2JZ- GE * 1 : 2JZ- GTE
To Daytime Runni ng
Li g h t Re l a y(
Main)
<6- 1>
B(
A/T)Y- GFrom Combination
Meter< 2 6- 5>
Y- G W
W
Charging Starting P ower Source
1B 4
W* 3 : Canada
(
*3)
12 I B2
B- W
K

CH03L-01
P11586
Z18809
Except Maintenance-Free Battery
Z18810
Maintenance-Free BatteryVoltmeter
Z11580
Blue
OKWhite
Charging
NecessaryRed
Insufficient
Water Maintenance-Free Battery CH-2
- CHARGINGCHARGING SYSTEM
1525 Author
: Date
:
1997 SUPRA (RM502U)
ON-VEHICLE INSPECTION
1. CHECK BATTERY ELECTROLYTE LEVEL
Check the electrolyte quantity of each cell.
Maintenance-Free Battery:
If under the lower level, replace the battery (or add distilled wa-
ter if possible). Check the charging system.
Except Maintenance-Free Battery:
If under the lower level, add distilled water.
2. Except Maintenance-Free Battery:
CHECK BATTERY SPECIFIC GRAVITY
Check the specific gravity of each cell.
Standard specific gravity: 1.25 - 1.29 at 20°C (68°F)
If the specific gravity is less than specification, charge the bat-
tery.
3. Maintenance-Free Battery:
CHECK BATTERY POSITIVE VOLTAGE
(a) After having driven the vehicle and in the case that 20
minutes have not passed after having stopped the en-
gine, turn the ignition switch ON and turn on the electrical
system (headlight, blower motor, rear defogger etc.) for
60 seconds to remove the surface charge.
(b) Turn the ignition switch OFF and turn off the electrical sys-
tems.
(c) Measure the battery positive voltage between the nega-
tive (-) and positive (+) terminals of the battery.
Standard voltage: 12.5 - 12.9 V at 20°C (68°F)
If the voltage is less than specification, charge the battery.
HINT:
Check the indicator as shown in the illustration.
4. CHECK BATTERY TERMINALS AND FUSES
(a) Check that the battery terminals are not loose or cor-
roded.
If the terminals are corroded, clean the terminals.
(b) Check the fuses for continuity.

Z05962
P11595
P11594
P10652
Type A
Type BAB
AB
Z05963
CORRECT WRONGWRONG
- CHARGINGCHARGING SYSTEM
CH-3
1526 Author
: Date
:
1997 SUPRA (RM502U)
5. INSPECT DRIVE BELT
HINT:
A belt tensioner is used, so checking the belt tension is not nec-
essary.
(a) Visually check the drive belt for excessive wear, frayed
cords, etc.
If necessary, replace the drive belt.
HINT:

Cracks on the rib side of a drive belt are considered ac-
ceptable. If the drive belt has chunks missing from the
ribs, it should be replaced.

The drive belt tension can be released by turning the belt
tensioner clockwise.
(b) Check the belt tensioner operation.

Check that the belt tensioner moves downward
when the drive belt is pressed down at the points in-
dicated in the illustration with approx. 98 N (10 kgf,
22.0 lbf) of force.

Check the alignment of the belt tensioner pulley to
make sure the drive belt will not slip off the pulley.
If necessary, replace the belt tensioner.

Check that the arrow mark on the belt tensioner falls
within area A of the scale.
If it is outside area A, replace the drive belt.
HINT:

When a new belt is installed, it should lie within area B. If
not, the drive belt is not correct.

After installing a drive belt, check that it fits properly in the
ribbed grooves.

Check by hand to confirm that the belt has not slipped out
of the groove on the bottom of the pulley.

Z03473
Disconnect Wire
from Terminal B Ammeter
Battery
Generator
Voltmeter
P10822Terminal F CH-4
- CHARGINGCHARGING SYSTEM
1527 Author
: Date
:
1997 SUPRA (RM502U)
6. REMOVE ENGINE UNDER COVER
7. VISUALLY CHECK GENERATOR WIRING AND
LISTEN FOR ABNORMAL NOISES
(a) Check that the wiring is in good condition.
(b) Check that there is no abnormal noise from the generator
while the engine is running.
8. CHECK CHARGE WARNING LIGHT CIRCUIT
(a) Warm up the engine and then turn it off.
(b) Turn off all accessories.
(c) Turn the ignition switch ºONº. Check that the charge warn-
ing light is lit.
(d) Start the engine. Check that the light goes off.
If the light does not go off as specified, troubleshoot the charge
light circuit.
9. INSPECT CHARGING CIRCUIT WITHOUT LOAD
HINT:
If a battery/generator tester is available, connect the tester to
the charging circuit as per manufacturer's instructions.
(a) If a tester is not available, connect a voltmeter and amme-
ter to the charging circuit as follows:

Disconnect the wire from terminal B of the genera-
tor, and connect it to the negative (-) probe of the
ammeter.

Connect the positive (+) probe of the ammeter to
terminal B of the generator.

Connect the positive (+) probe of the voltmeter to
terminal B of the generator.

Ground the negative (-) probe of the voltmeter.
(b) Check the charging circuit as follows:
With the engine running from idling to 2,000 rpm, check
the reading on the ammeter and voltmeter.
Standard amperage: 10 A or less
Standard voltage: 13.2 - 14.8 V
If the voltmeter reading is more than standard voltage, replace
the voltage regulator.
If the voltmeter reading is less than standard voltage, check the
voltage regulator and generator as follows:

With terminal F grounded, start the engine and
check the voltmeter reading of terminal B.

If the voltmeter reading is more than standard volt-
age, replace the voltage regulator.

If the voltmeter reading is less than standard volt-
age, check the generator.