1996 TOYOTA T100 turn signal

Downloaded from www.Manualslib.com manuals search engine F00360
6
ECU−IGABS ECU
L−W
LG
L
W−B 2 3
Deceleration
SensorA15ABS ECU
GS1
GS2
GST
GGND 19
7
5
18 GS1
GS2
GST IG1
A15
A15
A15 1 A14
A14
A14 A144
A146 5
F7 F7B
B Fuse Box
on J/B No.1
IG Switch
GGND
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−351
1996 TOYOTA T100 (RM449U)
DTC 44 Deceleration Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects deceleration on the vehicle. The sensor signal is used in ABS control. If the sensor func-
tions abnormally, the ABS warning light comes on but the ABS still operates.
DTC No.DTC Detecting ConditionTrouble Area
44
Either of following 1 or 2 is detected:
1. An open or short is detected in circuit GS1 or GS2 for
1sec.
2. After the ignition is turned ON, test signal is output by
GST. During this time, a trouble signal is detected for 0.5
sec.
Deceleration sensor
Open or short in deceleration sensor circuit
ECU
WIRING DIAGRAM
DI10M−03

Downloaded from www.Manualslib.com manuals search engine F00363
BRABS ECU
DLC1
R−YR−Y
EBIE1 A15
E1
3161
6
TsTs
AB0119S08096F00446
ON
E
1
Ts(−)
(+)
DI−360
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 TOYOTA T100 (RM449U)
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 E
1 of the DLC1 in the engine compartment starts the check.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and E1 of DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals Ts and E
1 of DLC1.
OK:
Voltage: 10 − 14 V
OK If ABS warning light does not blink even after Ts
and E
1 are connected, ECU may be defective.
NG
DI10W−03

Downloaded from www.Manualslib.com manuals search engine H18114
Center Airbag
Sensor Assembly ON
ACC
IG2
(−)
(+)
DI−394
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
DTC 31 Center Airbag Sensor Assembly Malfunction
CIRCUIT DESCRIPTION
The center airbag sensor assembly consists of a center airbag sensor, safing sensor, drive circuit, diagnosis
circuit and ignition control, etc.
It receives signals from the airbag sensors, judges whether or not the SRS must be activated, and diagnosis
system malfunction.
DTC 31 is recorded when occurrence of a malfunction in the center airbag sensor assembly is detected.
DTC No.DTC Detecting ConditionTrouble Area
31Center airbag sensor assembly malfunctionCenter airbag sensor assembly
INSPECTION PROCEDURE
HINT:
When a malfunction code other than code 31 is displayed at the same time, first repair the malfunction indi-
cated by the malfunction code other than code 31.
1 Preparation (See step 1 on page DI−396)
2 Check voltage at IG2 and ACC of center airbag sensor assembly.
PREPARATION:
(a) Disconnect center airbag sensor assembly connector.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals IG2 and ACC of center air-
bag sensor assembly and body ground.
OK:
Voltage: Below 16 V
NG Check battery and charging system.
(3RZ−FE: See page CH−2)
(5VZ−FE: See page CH−1)
OK
DI0XW−02

Downloaded from www.Manualslib.com manuals search engine BE6443
1
12
No.Operation MethodCRUISE MAIN Indicator LIght
Blinking PatternDiagnosis
1
2
3
4Drive approx. 40 km/h
(25 mph) or over
Drive approx 40 km/h
(25 mph) or below
LightON
OFF
LightON
OFF
ON
OFFSET/COAST switch circuit
is normal
RES/ACC switch circuit
is normal
LightON
OFF LightON
OFF
1sec.
0.25 sec. 0.25 sec.Push the speed control switch
SET/COAT on.
Push the speed control switch
RESUME/ACCEL on.
Each cancel switch turned
ON.
 Speed control switch (to
CANCEL)
 Stop light switch
 Park/Neutral position switch
(to N or O Position)
 Clutch start switch
 Parking brake switch
Speed sensor circuit is
normal
Speed sensor circuit is
normalEach cancel switch is
normal
5 DI−414
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
5. INPUT SIGNAL CHECK
HINT:
For check No.1 ∼ No.3
Turn ignition switch ON.
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 ”(1)”.
(b) Push the main switch ON ”(2)”.
(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.

Downloaded from www.Manualslib.com manuals search engine I22681
DI−422
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
DTC 12 Actuator Magnetic Clutch Circuit
CIRCUIT DESCRIPTION
This circuit turns on the magnetic clutch inside the actuator during cruise control operation according to the
signal from the ECU. If a malfunction occurs in the actuator or speed sensor, etc. during cruise control opera-
tion, the rotor shaft between the motor and control plate is released.
When the brake pedal is depressed, the stop light switch turns ON, supplying electrical power to the stop
light. Power supply to the magnetic clutch is mechanically cut and the magnetic clutch is turned OFF.
When driving downhill, if the vehicle speed exceeds the set speed by 15 km/h (9 mph), the ECU turns the
safety magnet clutch OFF. If the vehicle speed later drops to within 10 km/h (6 mph) above the set speed,
then cruise control at the set speed is resumed.
DTC No.Detection ItemTrouble Area
12Short in actuator magnetic clutch circuit.
Open (0.8 sec.) in actuator magnetic clutch circuit.
Actuator
Stop light switch
Wire harness
Cruise control ECU
WIRING DIAGRAM
DI351−02

Downloaded from www.Manualslib.com manuals search engine Input SignalIndicator Light
Blinking Pattern
SET/COAST
switch
RESUME/ACCEL
switch
CANCEL switch2 Pulses
ON
OFF
ON
OFF3 Pulses
ON
OFFSW OFF
SW ON
AB0119
I00136
I00162
ON
CCS
(+) (−)
DI−432
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Input signal check.
PREPARATION:
See input signal check on page DI−410.
CHECK:
Check the indicator light operation when each of the SET/
COAST, RESUME/ACCEL and CANCEL is turned ON.
OK:
SET/COAST, RESUME/ACCEL switch
The signals shown in the table on the left should be
output when each switch is ON. The signal should
disappear when the switch is turned OFF.
CANCEL switch
The indicator light goes off when the cancel switch is
turned ON.
OK Wait and see.
NG
2 Check voltage between terminal CCS of cruise control ECU connector and body
ground.
PREPARATION:
(a) Remove the ECU with connector still connected.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal CCS of ECU connector and
body ground, when each of the SET/COAST, RESUME/AC-
CEL and CANCEL is turned ON.
Switch positionVoltage (V)
Neutral10 − 16
RES/ACC0.8 − 14 V
SET/COAST2.4 − 4.0 V
CANCEL5.1 − 8.3 V
NG Proceed to next circuit inspection shown in
problem symptom table (See page DI−419).
OK

Downloaded from www.Manualslib.com manuals search engine I22687
DI−434
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
When the brake pedal is depressed, the stop light switch sends a signal to the ECU. When the ECU receives
this signal, it cancels the cruise control.
A fail−safe function is provided so that the cancel functions normally, even if there is a malfunction in the stop
light signal circuit.
The cancel conditions are: Battery positive voltage at terminal STP−
When the brake is ON, battery positive voltage is normally applied through the STOP fuse and stop light
switch to terminal STP− of the ECU, and the ECU turns the cruise control OFF.
If the harness connected to terminal STP− has an open circuit, terminal STP− will have battery positive volt-
age and the cruise control will be turned OFF.
Also, when the brake is ON, the magnetic clutch circuit is cut mechanically by the stop light switch, turning
the cruise control OFF (See page DI−422 for operation of the magnetic clutch).
WIRING DIAGRAM
DI355−02

Downloaded from www.Manualslib.com manuals search engine Input SignalIndicator Light
Blinking Pattern
Stop Light
switch ON
LightON
OFFSW OFF
SW ON
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−435
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check operation of stop light.
CHECK:
Check that stop light comes on when brake pedal is depressed, and turns off when brake pedal is released.
NG Check stop light system (See page BE−30).
OK
2 Input signal check.
CHECK:
(a) See input signal check on DI−410.
(b) Check the indicator light when the brake pedal is de-
pressed.
OK:
The indicator light goes off when the brake pedal is
depressed.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG