Page 801 of 1807
F03369
R/B No.2
TRAC
F03370BE6053F06762
LOCK
R/B No.5
(-) (+)
DI-510
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
738 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Check TRAC fuse.
PREPARATION:
Remove TRAC fuse from R/B No.2.
CHECK:
Check continuity of TRAC fuse.
OK:
Continuity
NG Check for short in all harness and components
connected to TRAC fuse.
OK
2 Check voltage between terminal 1 of R/B No.5 (for throttle control relay).
PREPARATION:
Remove throttle control relay from P/B No.5.
CHECK:
Measure voltage between terminal 1 of R/B No.5 (for throttle
control relay).
OK:
Voltage: 10 - 14 V
NG Repair or replace harness or connector.
OK
Page 802 of 1807
F03372F03373F03374
F03375
3
61
4
Open
Continuity
Continuity
31
4
61 3
64
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-51 1
739 Author: Date:
1997 SUPRA (RM502U)
3 Check throttle control relay.
PREPARATION:
Remove throttle control relay from R/B No.5
CHECK:
Check continuity between each terminal of throttle control relay.
OK:
Terminals 4 and 6Continuity (Reference value 80 W)
Terminals 1 and 3Open
CHECK:
(a) Apply battery voltage between terminals 4 and 6.
(b) Check continuity between terminals.
OK:
Terminals 1 and 3Continuity
NG Replace throttle control relay.
OK
Page 803 of 1807
DI-512
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
740 Author: Date:
1997 SUPRA (RM502U)
4 Check for open and short in harness and connector between throttle control
relay and throttle control ECU (See page IN-28).
NG Repair or replace harness or connector.
OK
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection.
If the connections are normal, the ECU may be defective.
Page 804 of 1807
F03376
ECM
VTO2
IDL2
Sub-throttle
Position Sensor 39
E10
E963
GR-R G-O
T1519
GR-R GR-R 3
T15
26
T15BR 12V
VTA2
12V
12V
GE01
E01 B BA A
12V
12V 12
T15
T15
25
T15
T15
23
T15
13
T15 W-B (Shielded)
L
Y
R
B Sub- throttle
Valve Motor
6
4
3
1
2
ED EC
IDL2
E1 11
24
Throttle Control ECU
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-513
741 Author: Date:
1997 SUPRA (RM502U)
DTC 21, 22 Sub-Throttle Valve Motor Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
21Sub-throttle valve motor circuit is open or short.
Sub-throttle valve motor
Wire harness and connector (sub-throttle valve motor and
E01 circuit)
Throttle control ECU
22In case the sub-throttle valve open angle is tilted.
Sub-throttle valve motor
Sub-throttle valve
Sub-throttle position senor
Wire harness and connector (E1 circuit)
Throttle control ECU
WIRING DIAGRAM
DI4VX-01
Page 805 of 1807
F03377
3
6
41
F03378BE6653F03379F03380
ON
IDL2
DI-514
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
742 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Check sub-throttle valve motor.
PREPARATION:
Disconnect sub-throttle valve motor connector.
CHECK:
Check continuity between each terminal of sub-throttle valve
motor connector.
OK:
Terminals 1 and 3Continuity
Terminals 4 and 6
Continuity
(Reference value 0.40 - 0.48 W)
NG Replace sub-throttle valve motor.
OK
2 Check voltage between terminal IDL2 of throttle control ECU and body ground.
PREPARATION:
(a) Remove throttle control ECU with connectors still con-
nected.
(b) Remove intake air duct.
(c) Disconnect sub-throttle valve motor connector.
(d) Turn ignition switch ON.
CHECK:
Measure voltage between terminal IDL2 of throttle control ECU
and body ground, when the sub-throttle valve is fully closed
and fully open.
OK:
Sub-throttle valve positionVoltage
Fully closed0 - 3 V
Fully open9 - 14 V
OK Go to step 4.
NG
Page 806 of 1807
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-515
743 Author: Date:
1997 SUPRA (RM502U)
3 Check for open and short in harness and connector between terminal IDL2 of
throttle control ECU and sub-throttle position sensor (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace throttle control ECU.
4 Check sub-throttle position sensor (See page DI-243).
NG Adjust or replace sub-throttle position sensor
(See page SF-44).
OK
5 Check for open and short in harness and connector between terminals E01, E1
of throttle control ECU and body ground (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace throttle control ECU.
Page 807 of 1807
F03376
ECM
VTO2
IDL2
Sub-throttle
Position Sensor 39
E10
E963
GR-R G-O
T1519
GR-R GR-R 3
T15
26
T15BR 12V
VTA2
12V
12V
GE01
E01B BA A
12V
12V 12
T15
T15
25
T15
T15
23
T15
13
T15 W-B
2
ED EC
IDL2
E1 11
24
Throttle Control ECU
(SHIELDED)
L
Y
R
B Sub- throttle
Valve Motor
6
4
3
1 DI-516
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
744 Author: Date:
1997 SUPRA (RM502U)
DTC 23 Throttle Body Malfunction
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
23In case the sub-throttle valve is fully open or full close angle
become smaller.Sub-throttle valve
Sub-throttle position senor
Throttle control ECU
WIRING DIAGRAM
DI4VY-01
Page 808 of 1807
F03378BE6653F03379F03380
ON
IDL2
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-517
745 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Check voltage between terminal IDL2 of throttle control ECU and body ground.
PREPARATION:
(a) Remove throttle control ECU with connectors still con-
nected.
(b) Remove intake air duct.
(c) Disconnect sub-throttle valve motor connector.
(d) Turn ignition switch ON.
CHECK:
Measure voltage between terminal IDL2 of throttle control ECU
and body ground, when the sub-throttle valve is fully closed
and fully open.
OK:
Sub-throttle valve positionVoltage
Fully closed0 - 3 V
Fully open9 - 14 V
OK Go to step 3.
NG
2 Check for open and short in harness and connector between terminal IDL2 of
throttle control ECU and sub-throttle position sensor (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace throttle control ECU.