1997 TOYOTA SUPRA check engine

F03342F03343F03344
NORMAL ABS (2JZ-GE Engine):
SPORT ABS (2JZ-GTE Engine):V (+)
(-)
(+)
(-)STP
STP
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-483
711 Author
: Date
:
1997 SUPRA (RM502U)
2 Check voltage between terminal STP of ABS ECU and body ground.
PREPARATION:
Remove ABS ECU with connectors still connected.
CHECK:
Measure voltage between terminal STP of ABS ECU and body
ground when brake pedal is depressed.
OK:
Voltage: 8 - 14 V
OK Proceed to next circuit inspection shown on
problem symptoms chart (See page DI-452).
NG
3 Check for open in harness and connector between ABS ECU and stop light
switch (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.

DI-486
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
714 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Is DTC output?
Check DTC on page DI-442.
YES Repair circuit indicated by the code output.
NO
2 Is normal code displayed?
YES Check ABS solenoid relay. Check for short in
harness and connector between ABS solenoid
relay and DLC1 (See page IN-28).
NO
3 Is ABS warning light go off?
YES Check for open or short in harness and conec-
tor between ECU-IG Fuse and ECU
(See page IN-28).
NO
4 Check battery positive voltage.
PREPARATION:
Start the engine.
CHECK:
Check the battery positive voltage.
OK:
Voltage: 10 - 16 V
NG Check and repair the charging system.
OK

F02629F03349F03350
LOCK
Open
ContinuityA8A9
Continuity
F02629F03351F03352
OpenContinuity
A8 A9
(+)
(-) LOCK
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-489
717 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
2JZ-GE Engine:
Troubleshooting in accordance with the chart below for each trouble symptom.
ABS warning light does not light upGo to step 1
ABS warning light remains onGo to step 3
1 Check ABS warning light.
See Combination Meter Troubleshooting on page BE-2.
NG Replace bulb or combination meter assembly.
OK
2 Check ABS control (solenoid) relay.
PREPARATION:
Disconnect the connectors from ABS control (solenoid) relay.
CHECK:
Check continuity between each terminal of ABS control (sole-
noid) relay.
OK:
Terminals A9 - 1 and A8 - 3Continuity (Reference value 80 W)
Terminals A9 - 5 and A9 - 6Continuity
Terminals A9 - 2 and A9 - 5Open
CHECK:
(a) Apply battery positive voltage between terminals A9 - 1
and A8 - 3.
(b) Check continuity between each terminal of ABS solenoid
relay.
OK:
Terminals A9 - 5 and A9 - 6Open
Terminals A9 - 2 and A9 - 5Continuity

F02629F03355
F03356
LOCK
Open
Continuity
Continuity
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-491
719 Author
: Date
:
1997 SUPRA (RM502U)
5 Check ABS control (solenoid) relay (See step No.2).
NG Replace ABS control relay.
OK
Repair or replace and check for short in harness and connector between DLC1 and ABS control
(solenoid) relay (See page IN-18).
2JZ-GTE Engine:
Troubleshoot in accordance with the chart below for each trouble symptom.
ABS warning light does not light upGo to step 1
ABS warning light remains onGo to step 3
1 Check ABS warning light.
See combination meter troubleshooting on page BE-2.
NG Replace bulb or combination meter assembly.
OK
2 Check ABS solenoid relay.
PREPARATION:
Remove solenoid relay from R/B No.5.
CHECK:
Check continuity between each terminal of ABS solenoid relay.
OK:
Terminals 4 and 6Continuity (Reference value 80 W)
Terminals 2 and 3Continuity
Terminals 1 and 3Open

F03361
ABS ECU
12 V
Tc
A20 A1998
*1 *2
R
R
R
IF1
11
P-B
II1 DLC1
R
*121*2P-B R
*1
*2
DLC2
11 Tc E
13
BR
BR BR
ED
IJ1 18BR
Tc E
134
NORMAL ABS (2JZ-GE Engine)
SPORT ABS (2JZ-GTE Engine)
*1:
*2:
S-17-1 Iei-23-1-A
F00041
DLC2
DLC1
E1Tc
E1
Tc
DI-494
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
722 Author
: Date
:
1997 SUPRA (RM502U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting terminals Tc and E1 of the DLC1 or the DLC1 or the DLC2 causes the ECU to display the DTC
by flashing the ABS warning light.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC2 or DLC1.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals Tc and E1 of DLC2 or
DLC1.
OK:
Voltage: 10 - 14 V
OK If ABS warning light does not blink even after Tc
and E1 are connected, the ECU may be defec-
tive.
NG
DI4VM-01

F03362
ABS ECU
Ts 8
*1*2
IJ1 DLC1
21 15
BR
EDTc E13
16
NORMAL ABS (2JZ-GE Engine)
SPORT ABS (2JZ-GTE Engine)
*1:
*2:
YY12 VA18A20
F00007lei-23-1-A
E1
Ts
DLC1
DI-496
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
724 Author
: Date
:
1997 SUPRA (RM502U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected with
the DTC check.
Connecting terminals Ts and E1 of the DLC1 in the engine compartment starts the check.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and E1 of DLC1.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals Ts and E1 of DLC1.
OK:
Voltage: 10 - 14 V
OK If ABS warning light does not blink even after Ts
and E1 are connected, the ECU may be defec-
tive.
NG
DI4VN-01

DI4VR-01
W02267
F03365
ON
OFF0.5
sec.1.5
sec.
S-17-1F02201F03525
DLC2DLC1
E1
TcTcE1
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-501
729 Author
: Date
:
1997 SUPRA (RM502U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Check the indicator.
When the ignition switch is turned ON, check that the
TRAC OFF indicator light goes on, and when the engine
is started, check that the TRAC OFF indicator light goes
off.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting for the TRAC OFF indicator light circuit (See page
DI-547).
(b) Check the DTC.
(1) Turn the ignition switch ON.
If the ECU stores DTC, the TRAC OFF indicator light blinks after
lighting up for 3 seconds.
The blinking pattern is shown on the left.
(2) Using SST, connect terminals Tc and E
1 of DLC2 or
DLC1.
SST 09843-18020

DI4VS-01
- DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI-503
731 Author
: Date
:
1997 SUPRA (RM502U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Using SST 09843-18020, connect the terminals Tc and E
1.
If a malfunction code is displayed during the DTC check, check the circuit listed for that code. For details
of each code, turn to the page referred to under the ºSee pageº for the respective ºDTC No.º in the DTC chart.
DTC No.
(See Page)Detection ItemTrouble Area
11
(DI-509)Throttle control relay circuit open

Throttle control relay

TRAC fuse

Wire harness and connector (throttle control relay circuit)

Throttle control ECU
12
(DI-509)Throttle control relay circuit short

Throttle control relay

Wire harness and connector (throttle control relay circuit)

Throttle control ECU
21
(DI-513)Sub-throttle valve motor circuit open or short

Sub-throttle valve motor

Wire harness and connector (sub-throttle valve motor and
E01 circuit)

Throttle control ECU
22
(DI-513)Sub-throttle valve motor malfunction

Sub-throttle valve motor

Sub-throttle valve

Sub-throttle position sensor

Wire harness and connector (E1 circuit)

Throttle control ECU
23
(DI-516)Throttle body malfunction

Sub-throttle valve

Sub-throttle position sensor

Throttle control ECU
24
(DI-519)Sub-throttle position sensor leakage/sub-throttle valve stuck

Sub-throttle valve

Sub-throttle position sensor

Wire harness and connector (E1 circuit)

Throttle control ECU
31
(DI-522)Throttle position sensor signal malfunction

Throttle position sensor

Wire harness and connector (throttle position senor and E1
circuit)

Throttle control ECU
32
(DI-526)Sub-throttle position sensor signal malfunction

Sub-throttle position sensor

Sub-throttle valve motor

Sub-throttle valve

Wire harness and connector (sub-throttle position senor and
E1 circuit)

Throttle control ECU
41
(DI-530)Engine revolution signal open or short

Wire harness and connector (NE circuit)

ECM

Throttle control ECU
42
(DI-532)ECM malfunction

Wire harness and connector (EFIF circuit)

ECM

Throttle control ECU
43
(DI-534)ECM communication circuit malfunction

Wire harness and connector (EFI+ and EFI- circuit)

ECM

Throttle control ECU
51
(DI-535)Power source voltage down
(sub-throttle valve in a bad condition)
Wire harness and connector (+B and E01 circuit)

Throttle control ECU