1996 TOYOTA T100 fuse

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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 AB0119
I00017
I00026
ON
N&C
(+) (−)
DI−448
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
3 Check voltage between terminal N & C of cruise control ECU and body ground.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminal N & C of cruise control ECU
connector and body ground when clutch pedal is depressed
and released.
OK:
Shift PositionVoltage
Clutch pedal releasedBelow 1 V
Clutch pedal depressed10 − 16 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG
4 Check for open in harness and connector between ECU and GAUGE fuse (See
page IN−16).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN−26).

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ECU−IG Fuse
AB0119
I00014I00027
GND B ON
(−)(+)
DI−450
− DIAGNOSTICSCRUISE CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check ECU−IG fuse.
PREPARATION:
Remove the ECU−IG fuse from instrument panel junction block.
CHECK:
Check continuity of ECU−IG fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to ECU−IG fuse.
OK
2 Check voltage between terminals B and GND of cruise control ECU connector.
PREPARATION:
(a) Remove the ECU with connector still connected.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals B and GND of ECU con-
nector.
OK:
Voltage: 10 − 16 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG

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ECU−B Fuse
I00016
BATT
(−)
(+)
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−453
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check ECU−B fuse.
PREPARATION:
Remove the ECU−B fuse from relay block No.1.
CHECK:
Check continuity of ECU−B fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the ECU−B fuse.
OK
2 Check voltage between terminal BATT of cruise control ECU connector and body
ground (See page IN−16).
PREPARATION:
Remove the ECU with connector still connected.
CHECK:
Measure voltage between terminal BATT of ECU connector
and body ground.
OK:
Voltage: 10 − 16 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG
Check and repair harness and connector be-
tween battery and cruise control ECU (See
page IN−16).

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TOYOTA Hand−Held Tester
DLC3SF0AG−03
P24761
− MFI (3RZ−FE)FUEL PUMP
MF−5
957 Author: Date:
1996 TOYOTA T100 (RM449U)
FUEL PUMP
ON−VEHICLE INSPECTION
1. CHECK FUEL PUMP OPERATION
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and TOYOTA hand−held tes-
ter main switch ON.
NOTICE:
Do not start the engine.
(c) Select the active test mode on the TOYOTA hand−held
tester.
(d) Please refer to the TOYOTA hand−held tester
operator ’s manual for further details.
(e) If you have no TOYOTA hand−held tester, connect the
positive (+) and negative (−) leads from the battery to the
fuel pump connector.
(See page MF−10)
(f) Check that there is pressure in the hose from the fuel filter.
HINT:
At this time, you will hear fuel return noise.
If there is no pressure, check these parts:
Fusible links (AM1 40A, AM2 30A, ALT 80A)
Fuses (EFI 15A, IGN 7.5A)
EFI main relay
Fuel pump
ECM
Wiring connections
(g) Turn the ignition switch to LOCK.
(h) Remove the TOYOTA hand−held tester.
2. CHECK FUEL PRESSURE
(a) Check that the battery voltage is above 12 volts.
(b) Disconnect the negative (−) terminal cable from the bat-
tery.
(c) Remove the union bolt and 2 gaskets, and disconnect the
fuel inlet pipe from the delivery pipe.
HINT:
Put a suitable container or shop rag under the delivery
pipe.
Slowly loosen the union bolt.

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TOYOTA Hand−Held Tester
DLC3
P21057
SF0BT−02
P21210
− SFI (5VZ−FE)FUEL PUMP
SF−5
1011 Author: Date:
1996 TOYOTA T100 (RM449U)
FUEL PUMP
ON−VEHICLE INSPECTION
1. CHECK FUEL PUMP OPERATION
(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.
NOTICE:
Do not start the engine.
(c) Select the active test mode on the TOYOTA hand−held
tester.
(d) Please refer to the TOYOTA hand−held tester operator’s
manual for further details.
(e) If you have no TOYOTA hand−held tester, connect the
positive (+) and negative (−) leads from the battery to the
fuel pump connector.
(f) Check that there is pressure in the fuel inlet hose from the
fuel filter.
HINT:
If there is fuel pressure, you will hear the sound of fuel flowing.
If there is no pressure, check these parts:
H−fuse (ALT 80A)
M−fuses (AM1 40A, AM2 30A)
Fuses (EFI 15A, IGN 7.5A)
EFI main relay
Circuit opening relay
Fuel pump
ECM
Wiring connections
(g) Turn the ignition switch to LOCK.
(h) Disconnect the TOYOTA hand−held tester from the
DLC3.
2. CHECK FUEL PRESSURE
(a) Check the battery positive voltage is above 12 V.
(b) Disconnect the negative (−) terminal cable from the bat-
tery.
(c) Remove the 6 bolts, and disconnect the No.2 timing belt
cover.
(d) Remove the union bolt holding the fuel pipe to the delivery
pipe and gasket.
CAUTION:
Put a shop towel under the delivery pipe. Slowly loosen the
union bolt.

Downloaded from www.Manualslib.com manuals search engine P15119
CH0743
Delco Battery
Green Dot Dark Clear
P06717
− CHARGING (3RZ−FE)CHARGING SYSTEM
CH−3
1996 TOYOTA T100 (RM449U)
4. CHECK BATTERY TERMINALS, FUSIBLE LINK AND
FUSES
(a) Check that the battery terminals are not loose or cor-
roded.
(b) Check the fusible link and fuses for continuity.
5. Delco Battery:
CHECK HYDROMETER
Green Dot visible:
Battery is adequately charged.
Dark (Green Dot not visible):
Battery must be charged.
Clear or Light Yellow:
Replace battery.
HINT:
There is no need to add water during the entire service life of
the battery.
6. INSPECT DRIVE BELT
(a) Visually check the belt for excessive wear, frayed cords
etc.
HINT:
Cracks on the ribbed side of the belt are considered acceptable.
If the belt has chunks missing from the ribs, it should be re-
placed.

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P06717
Z00038
Nippondenso Borroughs CH−2
− CHARGING (5VZ−FE)CHARGING SYSTEM
1221 Author: Date:
1996 TOYOTA T100 (RM449U)
When measuring the voltage, however, turn the ignition
switch OFF and turn off the electrical systems.
If the voltage is less than the specification, charge the battery.
HINT:
Check the indicator as shown in the illustration.
4. CHECK BATTERY TERMINALS, FUSIBLE LINK AND
FUSES
(a) Check that the battery terminals are not loose or cor-
roded.
(b) Check the fusible link and fuses for continuity.
5. INSPECT DRIVE BELT
(a) Visually check the belt for excessive wear, frayed cords
etc.
HINT:
Cracks on the ribbed side of the belt are considered acceptable.
If the belt has chunks missing from the ribs, it should be re-
placed.
(b) Using a belt tension gauge, check the drive belt tension.
Belt tension gauge:
Nippondenso BTG 20 (95506−00020) or
Borroughs No. BT−33−73F
Drive belt tension:
New belt: 160 ± 20 lbf
Used belt: 100 ± 20 lbf
If necessary, adjust the drive belt tension.