Page 651 of 1807
Q04361 FI6643A03136
T/M4-Pulse 4-Pulse
ECM
Combination
Meter No.1 Vehicle
Speed MeterTransmission
Output Shaft
Driven Gear
No.1 Vehicle Speed Sensor
S01080
GAUGE Fuse
23
II1
YY
Y
1
1
2No.1 Vehicle
Speed Sensor
Speed Meter3
L-R
II12
L-R5
Odometer and
Trip Meter
Telltale Light RH6
P11
II1P2
ASP1ECM
5V
E1 DI-238
- DIAGNOSTICSENGINE (2JZ-GTE)
466 Author: Date:
1997 SUPRA (RM502U)
DTC P0500 Vehicle Speed Sensor Malfunction
CIRCUIT DESCRIPTION
The No.1 vehicle speed senor outputs a 4-pulse signal for every revolution of the rotor shaft, which is rotated
by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectan-
gular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the
ECM. The ECM determines the vehicle speed based on the frequency of these pulse signals.
DTC No.DTC Detecting ConditionTrouble Area
P0500
No vehicle speed sensor signal to ECM under the following
conditions:
(2 trip detection logic)
(a) Park/neutral position switch is OFF
(b) Vehicle is being drivenOpen or short in vehicle speed sensor circuit
Vehicle speed sensor
Combination meter
ECM
WIRING DIAGRAM
DI4T7-01
Page 769 of 1807
F03337
ECU IG J/B No.1
DI-478
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
706 Author: Date:
1997 SUPRA (RM502U)
4 Check ECU-IG fuse.
PREPARATION:
Remove ECU-IG fuse from J/B No.1.
CHECK:
Check continuity of ECU-IG fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to ECU-IG fuse
(See attached wiring diagram).
OK
Check for open in harness and connector be-
tween ABS ECU and battery
(See page IN-28).
Page 800 of 1807
DI4VW-01
F03368
Throttle Control
ECU R/B No.5
Throttle Control Relay
(TRAC Solenoid Relay)
R/B
No.2
Battery+B
RLY-
RLY+
E01 9
12
4
13
BR L-B BR-BL-R 14
11
12
L-B L-Y L-R
BR-B
B2
1
2A5
4
2
13
IB5
T16
T15
EC 51
65
5
IB5
IB5T16
T16
TRAC
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-509
737 Author: Date:
1997 SUPRA (RM502U)
CIRCUIT INSPECTION
DTC 11, 12 Throttle Control Relay Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
11Instead of throttle control relay is ON, voltage at +B of ECU
terminal does not output 4 V or more for 1 sec. or more.
Throttle control relay
TRAC fuse
Wire harness and connector (throttle control relay circuit)
Throttle control ECU
12Instead of throttle control relay is OFF, voltage at +B of ECU
terminal outputs 4 V or more for 2 sec. or more.Throttle control relay
Wire harness and connector (throttle control relay circuit)
Throttle control ECU
WIRING DIAGRAM
Page 891 of 1807
N14677
Fuse
(+) (-)
DI-600
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
828 Author: Date:
1997 SUPRA (RM502U)
SRS Warning Light System Malfunction (Does not light up, when
ignition switch is in turned to ACC or ON.)
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is
turned from LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminals Tc and E
1 of the DLC1 are connected, the DTC is displayed by the blinking of the SRS warn-
ing light.
WIRING DIAGRAM
Refer to page DI-598 for the WIRING DIAGRAM.
INSPECTION PROCEDURES
1 Check ECU-B Fuse.
PREPARATION:
Remove the ECU-B fuse.
CHECK:
Check the continuity of ECU-B fuse.
OK:
Continuity
HINT:
Fuse may be burnt out even if it appears to be OK during
visual inspection.
If fuse is OK, install it.
NG Go to step 5.
OK
2 Preparation (See step 1 on page DI-595).
DI4WT-01
Page 922 of 1807
N08843N14677I04612
ECU-IG
CIG Junciton Block No.1
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-631
859 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Check CIG and ECU-IG fuses.
PREPARATION:
Remove CIG and ECU-IG fuses from J/B No.1.
CHECK:
Check continuity of CIG and ECU-IG fuses.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the CIG and ECU-IG fuses
(See attached wiring diagram).
OK
Page 936 of 1807
N09001
Relay Block No.2
DOME Fuse
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-645
873 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Check DOME fuse.
PREPARATION:
Remove DOME fuse from R/B No.2.
CHECK:
Check continuity of DOME fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the DOME fuse
(See attached wiring diagram).
OK
Page 938 of 1807
I02560
J/B No.1 DOOR FuseTheft Deterrent and
Door Lock ECU
Door Lock MotorT7
12V L-W L-W
+B2
9 13
IF1 W-L
R/B No.2
R/B No.2
POWER ALT
B W
Battery
1B 1H2
15
2
2
2
2A
1
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-647
875 Author: Date:
1997 SUPRA (RM502U)
Actuator Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power to drive the door lock motor.
WIRING DIAGRAM
DI4XE-01
Page 939 of 1807
N09001
Relay Block No.2
POWER M-Fuse
DI-648
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
876 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Check POWER M-fuse.
PREPARATION:
Remove POWER M fuse from R/B No.2.
CHECK:
Check continuity of POWER M-fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the DOOR fusible link
(See attached wiring diagram). *
1
OK
