1997 TOYOTA SUPRA CD player

23 Power Amplifier NO POWER COMING IN
+ B wire harness faulty.
GND faulty.
Power amplifier or wire harness faulty.
Power amplifier or wire harness faulty.
GND faulty.
Check if GND (wire harness side) to power amplifier is OK?
Is tape player operating normally?
Check if RAD-No.2 fuse is OK?
Is ACC applied to power amplifier?
Is + B applied to power amplifier?Ye s
NG
No OK No
No
No
No OK
OK
OK Ye s
Ye s
Ye s
Ye sNG
NG
NG Check if RAD-No.1 fuse is OK?
Is + B applied to radio assembly?
Radio assembly faulty.Replace fuse.
ACC wire harness faulty.
Is ACC applied to radio assembly?
Check if GND (wire harness side) to radio assembly is OK?
Radio assembly faulty.
Replace fuse.
BE-90
- BODY ELECTRICALAUDIO SYSTEM
2068 Author
: Date
:
1997 SUPRA (RM502U)

24 Power AmplifierPOWER COMING IN, BUT WOOFER (POWER) AMPLIFIER NOT
OPERATING
+ B wire harness faulty.
GND faulty.
Power amplifier faulty.
Speaker wire harness faulty. GND faulty.
Check if GND (wire harness side) to power amplifier is OK?
Is tape player operating normally?
Check if RAD-No.2 fuse is OK?
Is ACC applied to power amplifier?
Is + B applied to power amplifier?Ye s
NG
No OK No
No
No
No OK
OK
OK Ye s
Ye s
Ye s
Ye sNG
NG
NG Check if RAD-No.1 fuse is OK?
Is + B applied to radio assembly?
Radio assembly faulty. Recheck system after repair.Replace fuse.
ACC wire harness faulty.
Is ACC applied to radio assembly?
Check if GND (wire harness side) to radio assembly is OK?
Radio assembly faulty.
Replace fuse.
Is there continuity in speaker wire harness?
Temporarily install another speaker. Functions OK?
Hiss noise from speaker?Ye s
Ye s NoNo
No Ye sPower amplifier faulty.
Power amplifier faulty.
Recheck system after repair. Speaker faulty.
- BODY ELECTRICALAUDIO SYSTEM
BE-91
2069 Author
: Date
:
1997 SUPRA (RM502U)

CD player faulty.
Power amplifier faulty.
Recheck system after repair. Temporarily install another speaker.
Function OK?25 Power Amplifier ANY SPEAKER DOES NOT WORK
Speaker wire harness faulty.
Speaker faulty. Is hiss noise produced by non-functioning speaker?
Is there continuity in speaker wire harness? Is radio operating normally?
Ye sYe s
Ye s
Ye s No
No
NoNoRadio assembly faulty.
Recheck system after repair. BE-92
- BODY ELECTRICALAUDIO SYSTEM
2070 Author
: Date
:
1997 SUPRA (RM502U)

29
G
Position of Parts in Instrument Panel
O 5 O/D Main SW and A/T Indicator Illumination
P 4 PPS ECU
P 5 Parking Brake SW
R 4 Radio and Player (w/o Stereo Power Amplifier)
R 5 Radio and Player (w/o Stereo Power Amplifier)
R 6 Radio and Player (w/ Stereo Power Amplifier)
R 7 Remote Control Mirror SW
R 8 Rheostat
S 6 Seat Heater SW
S 7 Shift Lock ECU
S 8 Stereo Power Amplifier
S 9 Stereo Power Amplifier
S10 Stereo Power Amplifier
S11 Stop Light SW
S16 Sub Heated Oxygen Sensor (Bank 1 Sensor 2)
T 5 Telltale Light LH
T 6 Telltale Light RH
T 7 Theft Deterrent and Door Lock Control ECU
T 8 Traction Control SW
T13 Theft Deterrent and Door Lock Control ECU
T15 Throttle ECU
T16 Throttle ECU
U 1 Unlock Warning SW E 8 Electronically Controlled Transmission Pattern
Select SW
E 9 Engine Control Module
E10 Engine Control Module
E11 Engine Coolant Temp. Sensor (A/C System)
F10 Front Tweeter (Speaker) LH
F11 Front Tweeter (Speaker) RH
G 3 Glove Box Light
G 4 Glove Box Light SW
H10 Hazard SW
H11 Heated Oxygen Sensor (Bank 1 Sensor 2)
H12 Heater Control SW
H13 Heater Control SW
I18 Ignition Key Cylinder Light
I19 Ignition SW
I20 Integration Relay
J 1 Junction Connector
J 2 Junction Connector
K 4 Kick Down SW
N 2 Noise Filter

I19 I14 I14
I12
I12
2 1
3 2
1 2
8 20
9 2
104
13 12
A A2 1
IH2 5I14
IF3 10
IHIH1 10 G- OG-O G-O G-O G-O
G- O
G- OG- O G- O
W- BG- O W- G
W- B
G- O
G- O
G- O
G- O
G- O
G- O
G- O
G- O
G- O W- G
W- G
W- G
W- G
W- G
W- G
W- G W- GW- B W- BW
G- O G- O
G
3 21 BB W- G
(
*1)
(
*2)
A 10
B 5
B
GLOVE BOX LI GHT G 3
HAZARD SW H1 0
CI GARETTE LI GHTER
ILLUMINATION C 7
HEATER CONTROL SW H1 2 RADIO AND PLAYER (
*2)
RADIO AND PLAYER (
*1) R 6
ODO AND TRIP ILLUMINATION
[TELLTALE LIGHT RH] T 6
C10
METER ILLUMINATION
[COMB. METER]
J 1
JUNCTION CONNECTOR
JUNCTION
CONNECTOR J 1
(
*2)
(
*1)
GLOVE BOX
LIGHT SW G 4
B R 4 , R 5A
(
*1) (
*1)
I14
BB BBB
ILL- T
E RHE OSTAT R 8
123
* 2 : W/O STEREO POWER AMPLIFIER
* 1 : W/ STEREO POWER AMPLIFIER

B 8A 8
B 9A 1
B 3A 3
B 4A 4B 10B3 B9 B1 A6 A3
I16 IH1 8IH19
IF IF3 11A 4 GR
L- Y
L- Y
GR
P- L
P- L
B- R
B- R(
*1)
(
*1)
(
*2)
(
*2)
(
*1)
(
*2)
(
*1)
(
*2)
B- R
B- R
P- L
P- L
GR
V
L- Y
LGP- L
P- L
BR
GR
(
*1)
L- Y
(
*1)
P- L
(
*1)
V
(
*1)
LG
(
*1) (
SHI ELDED)
(
SHIELDED)
(
*2)
(
*1)
(
*2)
(
*1)
(
*2)
(
*1)
(
*2)
(
*1)(
*1)
(
*1)
ACC
+B1
AMP+
OUT
OUT
GND
(
*1)
(
*2)GND
BR
STER EO POWER
AMPLIFIER
RADIO AND PLAYERB S 8 , S 9A
A R 4 , R 6B ANT AMP ACC B
211
* 2 : W/O STEREO POWER AMPLIFIER * 1 : W/ STEREO POWER AMPLIFIER

20A
RAD
NO. 1
2
IB1 8
IH2 2IH26IH21IH23 IE1 10 IE111 IF32IF33
A 3A6D6D2D1 A 3A6C11 C4C10
A 4C2C1C8
A 4D3D9
IH1 2IH11IH15IH32IH31 C 9
D 4
IH1 6
I 5 I 5 I19 I19
IF3 11
ID1 2ID18IL15IL11IE19IE113
12 12 12
12 12
IF1122
LG- R LG- RLG- B LG- BL LG
L LGV PP
V
L LGV P
LG- RLG- BL LGV P
L V P
LG BR BR
WRY BB
Y
R
WWR Y B L- Y L- YGR
GND FL + FL- FR+ FR- WF+ WF-
C 14 D 5C 3(
*1)
(
*2)
(
*1)
(
*2)
D 8C 5 ACC +B1 RL+ RL- RR+ RR-
STEREO POWER AMPLIFIERREAR SPEAKER LH REAR SPEAKER RHR14 R13
F10
F11 F13 F12
W 2
FRONT DOOR SPEAKER LH
FRONT TWEETER
(
SPEAKER)
LHFRONT DOOR SPEAKER RH
FRONT TWEETER
(
SPEAKER)
RHWOOFER (
SPEAKER) B S 8 , S 9

,
S1
0 , AC FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
D 21
7. 5A
RAD
NO. 2
1H 3
214
RADIO AND PLAYER

IH1 8IH19 I1 6B 1 B 3 B 10 B9 B 14 B 13 B 6 B 5 B 4 B 12 B 11
B 1 B 3 B 9 B 10 B 14 B 13 B 6 B 5 B 4 B 12 B 11
AMP B ACC R. R R. L F. R F. L MUTE BEEP FADEAM P+ OUT OU T GN D R. R R. L F. R F. L MUTE BEEP FADE
1 4 3 15 14 7 6 5 12 1 3 11
GND
ANT(
*1)
(
*2)
ANT AMP
LGV BRWRL Y GB
P- L P- L B- R B- R
P- L P- L
A30 R 6
AUTO ANTENNA
CONTROL RELAY RADIO AND PLAYERSTEREO POWER AMPLIFIERB S 8 , S 9A
(
SHIELDED)
(
SHIELDED)
78 8 C , S10
, D
215
(w/STEREO POWER AMPLIFIER)* 2 : W/O WOOFER (
SPEAKER) * 1 : W/ WOOFER (
SPEAKER)