1996 TOYOTA T100 check engine

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LOCK Airbag Sensor Assembly
Tc
(+) (−)
DI−406
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
4 Check center airbag sensor assembly.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (−) terminal cable from the battery,
and wait at least 90 seconds.
(c) Remove steering wheel pad (See page SR−13 or
SR−26).
(d) Disconnect center airbag sensor assembly connector.
(e) Insert service wire into terminal Tc from back side as
shown.
(f) Connect center airbag sensor assembly connector with
service wire.
(g) Connect negative (−) terminal cable to battery.
(h) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(i) Connect service wire of terminal Tc to body ground.
CHECK:
Check operation of SRS warning light.
OK:
SRS waning light comes on.
NOTICE:
Never make a mistake with the terminal connection posi-
tion as this cause a malfunction.
OK Check harness between center airbag sensor
assembly and DLC1.
NG
Replace center airbag sensor assembly.

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Airbag Sensor Assembly
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−407
1996 TOYOTA T100 (RM449U)
If DTC is displayed without DTC check procedure, perform following trouble-
shooting:
1 Check resistance between terminal Tc of center airbag sensor assembly and
body ground.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (−) terminal cable from the battery,
and wait at least 90 seconds.
(c) Disconnect center airbag sensor assembly connector.
CHECK:
Check resistance between terminal Tc of center airbag sensor
assembly connector and body ground.
OK:
Resistance: 1MΩ or Higher
NG Repair or replace harness or connector.
OK
Replace center airbag sensor assembly.

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Customer Problem Analysis
Check and Clear DTC (Precheck)
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not occur
DTC CheckNormal code
DTC Chart
Problem Symptom Table
Circuit InspectionInput Signal Check
Parts Inspection
Identification of Problem
Repair
Confirmation 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
10Step 2, 5, 8, 10: Diagnostic steps permitting the use of the
TOYOTA hand−held tester or TOYOTA
break−out−box. P. DI−409
P. DI−410
P. DI−410
P. DI−415
P. IN−16
P. DI−419
P. DI−420 − DI−458
OKNG
Symptom occurs
Malfunction code DI−408
− DIAGNOSTICSCRUISE CONTROL SYSTEM
665 Author: Date:
1996 TOYOTA T100 (RM449U)
CRUISE CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING

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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  At 40 km/h (25 mph) or less
 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 )  Cruise MAIN
indicator light
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−409
1996 TOYOTA T100 (RM449U)
CUSTOMER PROBLEM ANALYSIS CHECK

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DI34V−02
BE4034
Indicator Light
1.5 sec.0.5 sec.
ON
OFF
I22833
DLC1 DI−410
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
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−36) for the combination meter
section.
(b) Check 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 diagnostic trouble code.
(c) Using diagnosis check wire, check the output of DTC.
(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.

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BE4033I00021
Normal Code
0.25 sec.
0.25 sec.
ON
OFF
ON
OFF
4 sec.1.5 sec. 0.5 sec.
2.5 sec.0.5 sec.1.5 sec.
Malfunction codes 11 and 21
Code 11 Code 21
N09348
TOYOTA hand−held tester
TOYOTA Break−out−box
N06038
ECU−B Fuse
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−411
1996 TOYOTA T100 (RM449U)
HINT:
If the DTC is not output, inspect the Tc circuit (See page
DI−456).
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 BREAK−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.
HINT:
TOYOTA hand−held tester has a ”Snapshot” function. This re-
cords the measured values and is effective in the diagnosis of
intermittent problems.
Please refer to the TOYOTA hand−held tester /TOYOTA
break−out−box operator’s manual for further details.
3. DTC CLEARANCE
(a) After completing repairs, the diagnostic trouble code re-
tained in memory can be cleared by removing the ECU−B
fuse for 10 seconds or more, with the ignition switch OFF.
(b) Check that the normal code is displayed after connecting
the fuse.

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N17520
N17520
DI−412
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
4. PROBLEM SYMPTOM CONFIRMATION (ROAD TEST)
(a) Inspect 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.
(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 cruises 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.
(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).

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N17520
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−413
1996 TOYOTA T100 (RM449U)
(d) Insepct 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
Shift to except D position
Push 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
Shift to except D position
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.