1996 TOYOTA LAND CRUISER Terminal

I00496
Cruise Control ECU
Fusible Link Fusible Link
Battery BR
BR
Instrument
Panel Fuse Block
ECU−IG
Ignition Switch BB
2
4 3
2
F6
1 JUNCTION
CONNECTOR J6
C17
C17B−W
I12
I12 4
2
2
2
2 B−W
F11
F11
B
B−Y
B
6EA2B
GND
13
14
AM1
FL AM1
1
ID
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−325
1996 LAND CRUISER (RM451U)
ECU Power Source Circuit
CIRCUIT DESCRIPTION
The ECU power source supplies power to the actuator and sensors, etc.. When\
terminal GND and the cruise
control ECU case are grounded.
WIRING DIAGRAM
DI5OM−02
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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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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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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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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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