TOYOTA LAND CRUISER 1996 J80 Workshop Manual

I00018
GND
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−327
1996 LAND CRUISER (RM451U)
3 Check resistance between terminal GND of cruise control ECU connector and
body ground (See page IN−28).
CHECK:
Measure resistance between terminal GND of ECU connector
and body ground.
OK:
Resistance: Below 1 Ω
NG Repair or replace harness or connector.
OK
Check and repair harness and connector be-
tween cruise control ECU and battery
(See page IN−28 ).
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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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I00016
BATT
(−)
(+)
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−329
1996 LAND CRUISER (RM451U)
2 Check voltage between terminal BATT of cruise control ECU connector and body
ground (See page IN−28).
PREPARATION:
Remove the ECU with connector still connected.
CHECK:
Measure voltage between terminal BATT of ECU connector
and body ground.
OK:
Voltage: 10 − 14 V
OK Proceed to next circuit inspection shown on problem symptoms table (See page DI−295 ).
NG
Check and repair harness and connector be-
tween battery and cruise control ECU
(See page IN−28 ).
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AB0119I00013 I00028
ONCMS
(−)
(+)
DI−330
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
Main Switch Circuit (Cruise Control Switch)
CIRCUIT DESCRIPTION
When the cruise control main switch is turned off, the cruise control does not operate.
WIRING DIAGRAM
See page DI−311 .
INSPECTION PROCEDURE
1 Check voltage between terminal CMS 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 CMS of cruise control ECU
connector when main switch is held on and off.
OK:
Main switchVoltage
OFF10 − 14 V
ONBelow 2 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−295 ).
NG
DI5OO−02
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N15969
35
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−331
1996 LAND CRUISER (RM451U)
2 Check main switch continuity.
PREPARATION:
(a) Remove steering wheel center pad (See page SR−11).
(b) Disconnect the control switch connector.
CHECK:
Check continuity between terminals 3 and 5 of control switch
connector when main switch is held on and off.
OK:
Switch positionTester connectionSpecified condition
OFF3 − 5No continuity
Hold ON3 − 5Continuity
NG Replace control switch.
OK
3 Check harness and connector between cruise control ECU and main switch (\
See page IN−28 ).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN−28 ).
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I00498
Cruise Control ECU
C17
Battery Fusible
Link
F6 B−L W
B
B G−Y
F11 F11
GAUGE
Y
2
Y9
CRUISE MAIN Indicator (Combination Meter)C10
C10
2 2 2
2
22
43
EA2
6
Ignition Switch
I12 I12
4
Instrument Panel Fuse Block
1
AM1
AM1 J1
JUNCTION
CONNECTOR
PI
7
DI−332
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
CRUISE MAIN Indicator Light Circuit
CIRCUIT DESCRIPTION
When the cruise control main switch is turned ON, CRUISE MAIN indicator ligh\
t lights up.
WIRING DIAGRAM
DI5OP−02
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AB0119I00020 I00029
ON
PI
(−)
(+)
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−333
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check voltage between terminals PI and GND of cruise control ECU connector.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals PI and GND of ECU con-
nector when main switch on and off.
OK:
Switch positionVoltage
OFF10 − 16 V
ONBelow 1.2 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−295 ).
NG
2 Check combination meter (See page BE−34 ).
NG Replace combination meter.
OK
Check and replace cruise control ECU (See
page IN−28 ).
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I00499
Cruise Control ECU
DLC1
TC D111
B−Y IH111
B−YC17 TC8
N06219
DLC1
TC
E1
DI−334
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
Diagnosis Circuit
CIRCUIT DESCRIPTION
This circuit sends a signal to the ECU that DTC output is required.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC1.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals Tc and E1 of DLC1.
OK:
Voltage: 10 − 14 V
OK Proceed to next circuit inspection shown on problem symptoms table (See page DI−295 ).
NG
DI5OQ−02
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−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−335
1996 LAND CRUISER (RM451U)
2 Check harness and connector between cruise control ECU and DLC1, DLC1 and
body ground (See page IN−28).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN−28 ).
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DI−336
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
Actuator Control Cable
INSPECTION PROCEDURE
1 Actuator control cable inspection
CHECK:
(a) Check that the actuator, control cable throttle link are properly installed and that the cable and link are
connected correctly.
(b) Check that the actuator and bell crank are operating smoothly.
(c) Check that the cable is not loose or too tight.
OK:
Freeplay: less than 10 mm
HINT:
If the control cable is very loose, the vehicle’s loss of speed going uphill will be large.
If the control cable is too tight, the idle RPM will become high.
DI5OR−01
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