1996 TOYOTA LAND CRUISER Fuse spec

N18670
Junction Block No.1ECU−B
Fuse
AB0119I00014 I00027
GNDB
ON
(−)
(+)
DI−326
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check ECU −B fuse.
PREPARATION:
Remove the ECU −B fuse from instrument panel fuse block.
CHECK:
Check continuity of ECU −B fuse.
OK:
Continuity
NG Check for short in all the harness and compo- nents connected to ECU−B fuse.
OK
2 Check voltage between terminals B and GND of cruise control ECU connecto\
r.
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:
10 − 14 V
OK Proceed to next circuit inspection shown on problem symptoms table (See page DI−295 ).
NG
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I00497
Cruise Control ECU
B−R BATT
C17
W
W Instrument Panel Fuse Block
Fusible Link
F8 F11
F11
EA3
FL MAIN
Battery 3
ECU−B 15
2
1
N18670
Junction Block No.1
ECU−IG
Fuse
DI−328
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
Back −up Power Source Circuit
CIRCUIT DESCRIPTION
The ECU back− up power source provides power even when the ignition is off and is used for DTC memory,
etc..
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check ECU −IG fuse.
PREPARATION:
Remove the ECU −IG fuse from relay block No.2.
CHECK:
Check continuity of ECU −IG fuse.
OK:
Continuity
NG Check for short in all the harness and compo- nents connected to the ECU −IG fuse.
OK
DI5ON−02
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EM0KT−06
EM−10
−
ENGINE MECHANICAL IGNITION TIMING
513
Author: Date:
1996 LAND CRUISER (RM451U)
IGNITION TIMING
INSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
2. CONNECT TOYOTA HAND −HELD TESTER OR OBD II
SCAN TOOL
(a) Remove the fuse cover on the instrument panel.
(b) Connect the TOYOTA hand−held tester or OBD II scan tool to the DLC3.
(c) Please refer to the TOYOTA hand−held tester or OBD II scan tool operator’s manual for further details.
3. CONNECT TIMING LIGHT TO ENGINE
4. CHECK IDLE SPEED
(a) Race the engine speed at 2,500 rpm for approx. 90 se- conds.
(b) Check the idle speed. Idle speed: 650 ± 50 rpm
5. INSPECT AND ADJUST IGNITION TIMING
(a) Using SST, connect terminals TE1 and E1 of the DLC1. SST 09843−18020
(b) Using a timing light, check the ignition timing. Ignition timing: 3 ° BTDC @ idle
(Transmission in neutral position and A/C OFF)
(c) Loosen the hold−down bolt, and adjust by turning the dis-
tributor.
(d) Tighten the hold− down bolt, and recheck the ignition tim-
ing.
Torque: 18 N·m (180 kgf·cm, 13 ft·lbf)
(e) Remove the SST from the DLC1. SST 09843−18020
6. FURTHER CHECK IGNITION TIMING Ignition timing: 2 − 13° BTDC @ idle
(Transmission in neutral position and A/C OFF)
HINT:
The timing mark moves in a range between 2 ° and 13° .
7. DISCONNECT TIMING LIGHT FROM ENGINE
8. DISCONNECT TOYOTA HAND −HELD TESTER OR
OBD II SCAN TOOL
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Z07256
ECU Side
−
SUSPENSION AND AXLE DIFFERENTIAL LOCKING SYSTEM
SA−103
960
Author: Date:
1996 LAND CRUISER (RM451U) DIFF. fuse/
8 (IG) − Body ground
Ignition switch ONBattery positive voltage
Rear diff. lock position switch/
2 (RLP) − Body groundIgnition switch ON,
Indicator light (Rear) ONAbout 0 V
Ignition switch ON,
Indicator light (Rear) OFFBattery positive voltage
Front diff. lock position switch/ 9 (FLP) − Body ground
Ignition switch ON,
Indicator light (front) ON.About 0 V
Ignition switch ON,
Indicator light (front) OFFBattery positive voltage
Center diff. indicator switch/ 15 (4WD) − Body groud
Ignition switch ON,
Indicator light (Center diff. lock) ONAbout 0 V
Ignition switch ON,
Indicator light (Ce nter diff. lock) OFFBattery positive voltage
Differential lock control switch/
12 (R) − Body ground
Ignition switch ON,
Diff. lock control switch RR or FR RRBattery positive voltage
Ignition switch ON,
Diff. lock control switch OFFAbout 0 V
Differential lock control switch/ 6 (RF) − Body ground
Ignition switch ON,
Diff. lock control switch FR RRBattery positive voltage
Ignition switch ON,
Diff. lock control switch OFF or RRAbout 0 V
HINT:
When a signal enters the ECU to LOCK the front dif ferential and
set the rear differential to FREE (when battery positive voltage
is inputted to terminal 6 (RF) of ECU and about 0 V is inputted
to terminal 12 (R)), or a signal to FREE both the front and rear
differentials, the indicator lights keep blinking until the ignition
switch is turned off (Fail−safe function).
If the circuit is not as specified, check and repair or replace the
trouble part shown in the table above.
(b) Inspect the battery positive voltage Battery positive voltage: 10 − 14.5 V
(c) Inspect the system circuit with connector connected (1) Turn the ignition switch to the ON position.
(2) Keep the center Diff. lock condition.
(3) Remove the Diff. lock ECU.
(4) Using a voltmeter, measure the voltage when thedifferential lock control switch is in the position, as
shown below.
Terminals (Symbols)Switch PositionSTD Voltage (V)
15 (4WD) − 13 (GND)−0.5 or less
9 (FLP) − 13 (GND)FR RR0.5 or less
2 (RLP) − 13 (GND)RR or FR RR0.5 or less
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FI4848
FI4849
SF−30
−
SFI INJECTOR
1996 LAND CRUISER (RM451U)
(f) Install the grommet and O−ring to the injector.
(g) Connect SST (union and hose) to the injector, and hold
the injector and union with SST (clamp).
SST 09268−41046
(h) Put the injector into the graduated cylinder.
HINT:
Install a suitable vinyl hose onto the injector to prevent gasoline
from splashing out.
(i) Remove the fuse cover on the instrument panel.
(j) Connect the TOYOTA hand−held tester to the DLC3.
(k) Turn the ignition switch ON and TOYOTA hand−held tes-
ter main switch ON.
NOTICE:
Do not start the engine.
(l) Select the active test mode on the TOYOTA hand −held
tester.
(m) Please refer to the TOYOTA hand −held tester operator’s
manual for further details.
(n) If you have no TOYOTA hand−held tester, connect the positive (+) and negative (−) leads from the battery to the
fuel pump connector (See page SF−14)
(o) Connect SST (wire) to the injector and battery for 15 se- conds, and measure the injection volume with a gra-
duated cylinder. Test each injector 2 or 3 times.
SST 09842−30070
Volume:
69 − 88 cm
3 (4.2 − 5.4 cu in.) per 15 seconds
Difference between each injector:
5 cm
3 (0.3 cu in.) or less
If the injection volume is not as specified, replace the injector.
2. INSPECT LEAKAGE
(a) In the condition above, disconnect the test probes of SST (wire) from the battery and check the fuel leakage from
the injector.
SST 09842−30070
Fuel drop: One drop or less per minute
(b) Turn the ignition switch to LOCK.
(c) Disconnect the negative ( −) terminal cable from the bat-
tery.
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SF0Q2−08
−
SFI FUEL CUT RPM
SF−67
695
Author: Date:
1996 LAND CRUISER (RM451U)
FUEL CUT RPM
INSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
2. CONNECT TOYOTA HAND −HELD TESTER OR OBD II
SCAN TOOL
(a) Remove the fuse cover on the instrument panel.
(b) Connect the TOYOTA hand−held tester or OBD II scan tool to the DLC3.
(c) Please refer to the TOYOTA hand−held tester or OBD II
scan tool operator’s manual for further details.
3. INSPECT FUEL CUTOFF PRM
(a) Increase the engine speed to at least 3,500 rpm.
(b) Use a sound scope to check for injector operating noise.
(c) Check that when the throttle lever is released, injector op-
eration noise stops momentarily and then resumes.
HINT:
Measure with the A/C OFF. Fuel return rpm: 1,200 rpm
4. DISCONNECT TOYOTA HAND −HELD TESTER OR
OBD II SCAN TOOL
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