TOYOTA SUPRA 1997 Service Repair Manual
Manufacturer: TOYOTA, Model Year: 1997, Model line: SUPRA, Model: TOYOTA SUPRA 1997Pages: 1807, PDF Size: 39.36 MB
Page 951 of 1807
DI4XJ-01
Customer Problem Analysis Check
Check and Clear DTC (Precheck)
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not occur
DTC CheckNormal code
DTC Chart
Problem Symptoms Table
Circuit InspectionInput Signal Check
Parts Inspection
Identification of Problem
Repair
Confirmation Test or Road Test *
EndItems inside
are titles of pages in this
manual with the page number indicated in the
bottom portion. See the indicated pages
for detailed explanations. 1
2
34
5
6
7
89
10
Step 2, 5, 8, 10: Diagnostic steps permitting the use
of the TOYOTA hand-held tester or
TOYOTA break-out-box. P. DI-661
P. DI-662
P. DI-662
P. DI-667
P. IN-18
P. DI-671 - DI-671
P. DI-673 - DI-710
OKNG
Malfunction code
Clear DTC
P. DI-662*: See next page DI-660
- DIAGNOSTICSCRUISE CONTROL SYSTEM
888 Author: Date:
1997 SUPRA (RM502U)
CRUISE CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following page.
Page 952 of 1807
DI4XK-01
CRUISE CONTROL SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date of VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading / /km
Mile
Condition of
Problem Occurrence
Date of Problem
How Often does
Occurrence
Problem Occur?
Vehicle Speed when
Problem Occurred / /
Continuous Intermittent ( Times a day)
km
Mile Brought in
Auto cancel
occurs Driving condition
City driving Freeway Up hill Down hill
After cancel occurred, did the driver activate cruise control
again?
Yes No
Cancel does not
occur With brake ON
Except D position shift
When control SW turns to CANCEL position
Cruise control
malfunction Slip to acceleration side
Slip to deceleration side
Hunting occurs
O/D cut off does not occur
O/D does not return
Switch
malfunction SET ACCEL COAST RESUME CANCEL
Remains ON Does not light up Blinking Symptoms
DTC Check1st Time2nd Time
Normal Code Malfunction Code (Code )
Normal Code Malfunction Code (Code )
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-661
889 Author: Date:
1997 SUPRA (RM502U)
CUSTOMER PROBLEM ANALYSIS CHECK
Page 953 of 1807
N08654
DI4XL-01
BE4034
Indicator Light
1.5 sec.
0.5 sec.
ON
OFF
N19819
DLC1E1Tc
DI-662
- DIAGNOSTICSCRUISE CONTROL SYSTEM
890 Author: Date:
1997 SUPRA (RM502U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Check the indicator.
(1) Turn the ignition switch to ON.
(2) Check that the CRUISE MAIN indicator light comes
on when the cruise control main switch is turned on,
and that the indicator light goes off when the main
switch is turned OFF.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting (See page BE-2) for the combination meter section.
(b) Clear the DTC.
HINT:
If a malfunction occurs in the No.1 vehicle speed sensors or ac-
tuator, etc. during cruise control driving, the ECU actuates
AUTO CANCEL of the cruise control and turns on and off the
CRUISE MAIN indicator light to inform the driver of a malfunc-
tion. At the same time, the malfunction is stopped in memory as
a DTC.
(c) Output of DTC using diagnosis check wire.
(1) Turn the ignition switch ON.
(2) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(3) Read the DTC on the CRUISE MAIN indicator light.
Page 954 of 1807
BE4032
BE4033I00021
0.25 sec.
0.25 sec. Normal Code
Malfunction codes 11 and 21
4 sec.0.5 sec.
1.5 sec.
1.5 sec. 0.5 sec.
2.5 sec.
ON
OFF
Code 11 Code 21 ON
OFF
N09348
TOYOTA Hand-Held Tester
TOYOTA Break-out-box
N09001DOME Fuse
R/B No.2
I02735
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-663
891 Author: Date:
1997 SUPRA (RM502U)
HINT:
If the DTC is not output, inspect the diagnosis circuit (See
page DI-708).
As an example, the blinking patterns for codes; normal,
11 and 21 are shown in the illustration.
2. ECU TERMINAL VALUES MEASUREMENT BY USING
TOYOTA BRAKE-OUT-BOX AND TOYOTA HAND-
HELD TESTER
(a) Hook up the TOYOTA break- out- box and TOYOTA
hand-held tester to the vehicle.
(b) Read the ECU input/output values by following the
prompts on the tester screen.
(c) Please refer to the TOYOTA hand-held tester has a
ºSnapshotº function. This records the measured data and
is effective in the diagnosis of intermittent problems.
3. DTC CLEARANCE
(a) After completing repairs, the DTC retained in memory can
be cleared by removing the DOME fuse for 10 seconds or
more, with the ignition switch off.
(b) Check that the normal code is displayed after connecting
the fuse.
4. PROBLEM SYMPTOM CONFIRMATION (Road Test)
(a) Inspection the SET switch.
(1) Push the main switch ON.
(2) Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3) Press the control switch to the SET/COAST.
(4) After releasing the switch, check that the vehicle
cruises at the desired speed.
Page 955 of 1807
I02735
I02735
DI-664
- DIAGNOSTICSCRUISE CONTROL SYSTEM
892 Author: Date:
1997 SUPRA (RM502U)
(b) Inspect the ACCEL switch.
(1) Push the main switch ON.
(2) Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3) Check that the vehicle speed is increased while the
control switch turned to RES/ACC, and that the ve-
hicle cruise at the set speed when the switch is re-
leased.
(4) Momentarily press the control switch upward in the
RES/ACC and then immediately release it. Check
that the vehicle speed increases by about 1.5 km/h
(Tap-up function).
(c) Inspect the COAST switch.
(1) Push the main switch ON.
(2) Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3) Check that the vehicle speed is decreased while the
control switch is turned to SET/COAST, and the ve-
hicle cruise at the set speed when the switch is re-
leased.
(4) Momentarily press the control switch is turned to
SET/COAST, and then immediately release it.
Check that the vehicle speed decreases by about
1.5 km/h (Tap-down function).
Page 956 of 1807
I02735
I02735
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-665
893 Author: Date:
1997 SUPRA (RM502U)
(d) Inspect the CANCEL switch.
(1) Push the main switch ON.
(2) Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3) When operating one of the followings, check that
the cruise control system is cancelled and that the
normal driving mode is reset.
Depress the brake pedal
Depress the clutch pedal (M/T)
Shift to except D position (A/T)
Turn the main switch OFF
Pull the cruise control switch to CANCEL
(e) Inspect the RESUME switch.
(1) Push the main switch ON.
(2) Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3) When operating one of the followings, check that
the cruise control system is cancelled and that the
normal driving mode is reset.
Depress the brake pedal
Depress the clutch pedal (M/T)
Shift to except D position (A/T)
Turn the main switch OFF
Pull the cruise control switch to CANCEL
(4) After the control switch is turned to RES/ACC at the
driving speed of more than 40 km/h (25 mph), check
that the vehicle restores the speed prior to the can-
cellation.
Page 957 of 1807
BE6443
(1)
(2)
(1)
No.
Operation MethodCRUISE MAIN Indicator Light
Blinking PatternDiagnosis
1
3
4
2Turn SET/COAST switch ON
Turn RES/ACC switch ON
Drive at about 40 km/h
(25 mph) or below Turn CANCEL switch ON
Turn stop light switch ON
Depress brake pedal
Turn PNP switch OFF
(Shift to except D position)
Turn clutch switch OFF
(Depress clutch pedal)
Drive at about 40 km/h
(25 mph) or higherSET / COAST switch
circuit is normal
RES / ACC switch circuit
is normal
PNP switch circuit is normal CANCEL switch circuit
is normal
Clutch switch circuit is normal
Vehicle Speed Sensor is
normal
Stop light switch circuit
is normal ON
OFF
0.25 sec.
0.25 sec.
1 sec.Light
ON
OFFLight
ON
OFF Light
ON
OFF Light
ON
OFF Light
ON
OFF Light
Switch OFF
Switch ON
Switch ON
Switch OFF DI-666
- DIAGNOSTICSCRUISE CONTROL SYSTEM
894 Author: Date:
1997 SUPRA (RM502U)
5. Using TOYOTA hand-held tester:
INPUT SIGNAL CHECK
HINT:
(1) For check No.1 - No.2
Turn the ignition switch ON.
(2) For check No.3
Turn ignition switch ON.
Shift to D position.
(3) For check No.4
Jack up the vehicle.
Start the engine.
Shift to D position.
(a) Press the control switch to SET/COAST or RES/ACC
position and hold it down or hold it up º1º.
(b) Push the main switch ON º2º.
(c) Check that the CRUISE MAIN indicator light blinks twice
or 3 times repeatedly after 3 seconds.
(d) Turn the SET/COAST or RES/ACC switch OFF.
(e) Operate each switch as listed in the table below.
(f) Read the blinking pattern of the CRUISE MAIN indicator
light.
(g) After performing the check, turn the main switch OFF.
HINT:
When 2 or more signals are input to the ECU, the lowest num-
bered code will be displayed first.
Page 958 of 1807
DI4XM-01
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-667
895 Author: Date:
1997 SUPRA (RM502U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below and proceed to the appropriate page.
DTC No.
(See Page)Detection ItemTrouble Area
11, 15
(DI-673)Actuator Motor Circuit
Cruise control actuator motor
Harness or connector between actuator motor and ECU
ECU
12
(DI-675)Actuator Magnetic Clutch Circuit
Cruise control magnetic clutch
Harness or connector between ECU and magnetic clutch,
magnetic clutch and body ground
ECU
14
(DI-677)Actuator Motor Circuit
Cruise control actuator motor
Harness or connector between actuator motor and ECU
ECU
21
(DI-679)Vehicle Speed Sensor Circuit
Vehicle speed sensor
ECU
Combination meter
Harness or connector between vehicle speed sensor and
ECM, ECM and combination meter, combination meter and
ECU
ECU
23
(DI-681)Vehicle Speed Sensor Circuit
Vehicle speed sensor
Harness or connector (SPD)
ECU
32
(DI-682)Control Switch Circuit (Cruise Control Switch)
Cruise control switch
Harness or connector between control switch and ECU
ECU
41Cruise Control ECU ECU
42Source voltage dropPower source
51
(DI-685)Idle switch circuit
Throttle position sensor
Harness or connector between cruise control ECU and
throttle position sensor
ECU
HINT:
1. When 2 or more codes are indicated, the lowest numbered code will be displayed first.
2. If the inspection ºProceed to next circuit inspection shown on matrix chartº is given in the flow chart
for each circuit, proceed to the circuit with the next highest number in the table to continue check.
3. If the trouble still reappears even though there are no abnormalities in any of the other circuit, then
check or replace the cruise control ECU as the last step.
(*) When the vehicle speed decrease on uphill roads, the speed can be set again and driving contin-
ued. (This is not a malfunction.)
Page 959 of 1807
DI4XN-01
I02713 I02713
DLC1
Cruise Control
ActuatorR/B No.2
DOME Fuse
Cruise Control ECU
Cruise Control Switch
Clutch Switch
Vehicle Speed Sensor
Park/Neutral Position SwitchStop Light Switch J/B No.1
ECU-B Fuse
ECU-IG Fuse DI-668
- DIAGNOSTICSCRUISE CONTROL SYSTEM
896 Author: Date:
1997 SUPRA (RM502U)
PARTS LOCATION
Page 960 of 1807
DI4XO-01
I04621
C16
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-669
897 Author: Date:
1997 SUPRA (RM502U)
TERMINALS OF ECM
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
D e GNDGRWB
M/T: Depress clutch pedal
A/T: Shift to except D positionBelow 1 VD e GND
(C16-2 eC16-13)G-R e W-BM/T: Release clutch pedal
A/T: Shift to D position10 - 16 V
PI e GNDOWB
Ignition switch ON
Cruise control main switch ONBelow 1.2 VPI e GND
(C16-7 eC16-13)O e W-BIgnition switch ON
Cruise control main switch OFF10 - 16 V
TCGNDIgnition switch ON10 - 16 VTC e GND
(C16-8 eC16-13)R e W-BIgnition switch ON
Connect terminals TC and E
1 of DLC1Below 1 V
OD e GNDLG BWB
During cruise control driving
OD switch ON10 - 16 VOD e GND
(C16-9 eC16-13)LG-B e W-BDuring cruise control driving
OD switch OFF (3rd driving)Below 1 V
L e GNDBWWBDuring cruise control driving9 - 15 VL e GND
(C16-10 eC16-13)B-W e W-BExcept during cruise control drivingBelow 1 V
MC e GNDGRWB
During cruise control driving
COAST switch hold ON9 - 15 VMC e GND
(C16-1 1 eC16-13)G-R e W-BDuring cruise control driving
ACC switch hold ONBelow 1 V
MO e GNDLGWB
During cruise control driving
ACC switch hold ON9 - 15 VMO e GND
(C16-12 eC16-13)LG e W-BDuring cruise control driving
COAST switch hold ONBelow 1 V
GND e Body Ground
(C16-13 eBody Ground)W-B e Body
GroundConstantBelow 1 V
B e GND
(C16-14 eC16-13)B-R e W-BIgnition switch ON10 - 16 V
BATT e GND
(C16-15 eC16-13)W-R e W-BConstant10 - 16 V
STP e GNDG-W e W-BDepress brake pedal10 - 16 VSTP e GND
(C16-16 eC16-13)G-W e W-BRelease brake pedalBelow 1 V