1996 TOYOTA T100 turn signal

Downloaded from www.Manualslib.com manuals search engine A16046
− DIAGNOSTICSENGINE (5VZ−FE)
DI−233
1996 TOYOTA T100 (RM449U)
2 Check for open in harness or ECM.
PREPARATION:
(a) Remove right cowl side trim.
(b) Connect between terminals IDL and E2 of ECM connec-
tors.
HINT:
Throttle position sensor connector is disconnected. Before
checking, do a visual check and contact pressure check for the
connector.
(c) Turn ignition switch ON.
CHECK:
Read CTP switch signal on the TOYOTA hand−held tester.
OK:
CTP switch signal: ON
OK Open in harness between ECM and throttle
position sensor, repair or replace harness.
NG
Confirm connection at ECM. If OK, replace
ECM.

Downloaded from www.Manualslib.com manuals search engine BE6653
P24211
P24326A00122
ON
IGF (+)
IGF (+)
For M/T
For A/T
− DIAGNOSTICSENGINE (5VZ−FE)
DI−237
1996 TOYOTA T100 (RM449U)
2 Check for open and short in harness and connector in IGF signal circuit between
ECM and igniter (See page IN−26).
NG Repair or replace harness or connector.
OK
3 Disconnect igniter connector and check voltage between terminal IGF of ECM
connector and body ground.
PREPARATION:
(a) Disconnect the igniter connector.
(b) Remove the right cowl side trim (See page SF−61).
(c) Turn the ignition switch ON.
CHECK:
Measure voltage between terminal IGF of ECM connector and
body ground.
OK:
Voltage: 4.5 − 5.5 V
OK Replace igniter.
NG
Check and replace ECM (See page IN−26).

Downloaded from www.Manualslib.com manuals search engine − DIAGNOSTICSENGINE (5VZ−FE)
DI−243
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
HINT:
This diagnostic chart is based on the premise that the engine is cranked normally. If the engine is not
cranked, proceed to the matrix chart of problem symptoms on page DI−148.
1 Connect the TOYOTA hand−held tester and check STA signal.
PREPARATION:
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn ignition switch ON and push TOYOTA hand−held tester main switch ON.
CHECK:
Read STA signal on the TOYOTA hand−held tester while starter operates.
OK:
Ignition Switch PositionONSTART
STA SignalOFFON
OK Proceed to next circuit inspection shown on
matrix chart (See page DI−148).
NG
2 Check for open in harness and connector between ECM and starter relay (See
page IN−26).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN−26).

Downloaded from www.Manualslib.com manuals search engine − DIAGNOSTICSENGINE (5VZ−FE)
DI−249
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
HINT:
This diagnostic chart is based on the premise that the engine is cranked normally. If the engine is not
cranked, proceed to the problem symptoms table on page DI−148.
TOYOTA hand−held tester:
1 Connect TOYOTA hand−held tester and check STA signal.
PREPARATION:
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand−held tester main switch ON.
CHECK:
Read STA signal on the TOYOTA hand−held tester while starter operates.
OK:
Ignition Switch PositionONSTART
STA signalOFFON
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−148).
NG
2 Check for open in harness and connector between ECM and starter relay (Mark-
ing: ST) (See page IN−26).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN−26).

Downloaded from www.Manualslib.com manuals search engine A01010
EFI
AM2
AM1
ALT
BatteryIG Switch
IG2
IG1
STIGNEFI Relay
Circuit Opening Relay
Clutch Start
Cancel Switch
(M/T)
L1 L2
ECM Fuel Pump
FC
Tr
STA
NE
Starter
Park/Neutral
Position Switch
(A/T)
Relay Starter
Start Clutch
Switch
(M/T)Crankshaft From
Position
Sensor(STA Signal)
(NE Signal)
− DIAGNOSTICSENGINE (5VZ−FE)
DI−255
1996 TOYOTA T100 (RM449U)
Fuel Pump Control Circuit
CIRCUIT DESCRIPTION
The fuel pump is switched on (low voltage at terminal FC) when STA is on or while the NE signal is input to
the ECM.
In the diagram below, when the engine is cranked, current flows from terminal ST of the ignition switch to
the starter relay coil, the starter relay switches on and current flows to coil L1 of the circuit opening relay.
Thus the circuit opening relay switches on, power is supplied to the fuel pump and the fuel pump operates.
When the STA signal and NE signal are input to the ECM, Tr is turned ON, current flows to coil L2 of the circuit
opening relay, the relay switches on and the fuel pump operates.
While the NE signal is generated (engine running), the ECM keeps Tr ON (circuit opening relay ON) and the
fuel pump also keeps operating.
DI0VC−01

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START3
BE6653P24337P24336
A00773A00789
ON
For M/T
For A/TFC (+)
FC (+)
Fuel Inlet Hose
DI−260
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
8 Check voltage between terminal 3 of circuit opening relay connector and body
ground.
CHECK:
Measure voltage between terminal 3 of circuit opening relay
connector and body ground when engine is cranked.
OK:
Voltage: 9 − 14 V
NG Check for starter signal circuit (See page
DI−248).
OK
Check for open in harness and connector be-
tween terminal 6 of circuit opening relay con-
nector and body ground (See page IN−26).
OBD II scan tool (excluding TOYOTA hand−held tester):
1 Check operation of fuel pump.
PREPARATION:
(a) Remove the right cowl side trim (See page SF−61).
(b) Turn the ignition switch ON.
CHECK:
(a) Connect between terminal FC of ECM connector and
body ground.
(b) Check for fuel pressure in the inlet hose when it is pinched
off.
OK:
There is pressure in the fuel inlet hose.
HINT:
At this time, you will hear a fuel flowing noise.
OK Go to step 7.
NG

Downloaded from www.Manualslib.com manuals search engine N09214
DI−266
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
The diagnosis system operates in normal mode
during normal vehicle use, and also has a check
mode for technicians to simulate malfunction symp-
toms and perform troubleshooting. Most DTCs use
2 trip detection logic(*) to prevent erroneous detec-
tion. By switching the ECM to check mode when
troubleshooting, the technician can cause the MIL
to light up and for a malfunction that is only detected
once or momentarily (TOYOTA hand−held tester)
(See page DI−265).
*2 trip detection logic:
When a logic malfunction is first detected, the mal-
function is temporarily stored in the ECM memory.
If the same malfunction is detected again during the
2nd test drive, this 2nd detection causes the MIL to
light up.
(b) Inspect the DLC3.
The vehicle’s ECM uses the V.P.W. (Variable Pulse Width)
for communication to comply with SAE J1850. The termi-
nal arrangement of DLC3 complies with SAE J1962 and
matches the V.P.W. format.
Terminal No.Connection / Voltage or ResistanceCondition
2Bus  Line / Pulse generationDuring communication
4Chassis Ground ↔ Body / 1 Ω or lessAlways
5Signal Ground ↔ Body / 1 Ω or lessAlways
16Battery Positive ↔ Body / 9 − 14 VAlways
HINT:
If your display shows ”UNABLE TO CONNECT TO VEHICLE”
when you have connected the cable of OBD II scan tool or TOY-
OTA hand−held tester to DLC3, turned the ignition switch ON
and operated the scan tool, there is a problem on the vehicle
side or tool side.
If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.
If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool’s instruction manual.

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FI6526
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 261 2 3 4 5 6 7 8
9 10 11 12 13 14 15 161 2 3 4 5 6
7 8 9 10 11 121 2 3 4 5 6 7 8 9 10 11
14 15 16 17 18 19 20 21 22 1213
EE6
E
ECM Terminals
E
− DIAGNOSTICSAUTOMATIC TRANSMISSION
DI−279
1996 TOYOTA T100 (RM449U)
TERMINALS OF ECM
3RZ−FE:
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
SP1 − E1 (E4, 8 − E7, 24)G ↔ BR
IG switch ON (Disconnect cruise control connector)Below 1.5 or 4 − 6
Turn one rear wheel slowly (Disconnect cruise control connec-
tor)Pulse signal is output
Below 1.5 ↔ 4 − 6

S1 − E1 (E7, 10 − E7, 24)

W ↔ BR
IG switch ON9 − 14
1st or 2nd gear9 − 14
3rd or O/D gearBelow 1.5
S2 − E1 (E7, 9 − E7, 24)B−W ↔ BR
IG switch ONBelow 1.5
2nd or 3rd gear9 − 14
1st or O/D gearBelow 1.5
SL − E1 (E7, 8 − E7, 24)Y−B ↔ BRIG switch ONBelow 1.5
Vehicle driving under lock−up position9 − 14
SP2+ − SP2− (E5, 10 − E5, 4)BR−R ↔ B−RVehicle is runningPulse signal is output
Below 1.5 ↔ 4 − 10
OD2 − E1 (E4, 5 − E7, 24)Y−G ↔ BRO/D main switch ON (Pushed in)9 − 14
O/D main switch OFF (Pushed once again)Below 3
OIL − E2 (E7, 21 − E6, 9)G−B ↔ BR−BATF temperature: 110°C (230°F) or moreBelow 1.5
L − E1 (E4, 15 − E7, 24)V−W ↔ BRIG switch ON, Shift lever L position7.5 − 14
IG switch ON, Shift lever other than L positionBelow 1.5
2 − E1 (E4, 16 − E7, 24)P−G ↔ BRIG switch ON, Shift lever 2 position7.5 − 14
IG switch ON, Shift lever other than 2 positionBelow 1.5
R − E1 (E4, 17 − E7, 24)R−B ↔ BRIG switch ON, Shift lever R position7.5 − 14
IG switch ON, Shift lever other than R positionBelow 1.5
NSW − E1 (E4, 22 − E7, 24)B−Y ↔ BRIG switch ON, Shift lever P or N positionBelow 3
IG switch ON, Shift lever other than P or N position9 − 14
B/K − E1 (E4, 21 − E7, 24)G−W ↔ BRIG switch ON, Brake pedal is depressed7.5 − 14
IG switch ON, Brake pedal is releasedBelow 1.5
THW − E2 (E6, 4 − E6, 9)G−Y ↔ BR−BEngine coolant temperature: 80°C (176°F)Below 1.5
IDL − E2 (E6, 11 − E6, 9)Y−L ↔ BR−BIG switch ON, Accel. pedal is releasedBelow 1.5
IG switch ON, Accel. pedal is depressed9 − 14
VTA − E2 (E6, 10 − E6, 9)Y−B ↔ BR−BIG switch ON, Accel. pedal is releasedBelow 0.3 − 0.8
IG switch ON, Accel. pedal is depressed3.2 − 4.9