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ACX00915
3Checking of Parts Associated with
Probable Causes and Determination
of Faulty Parts 2
Determination of Probable Causes
4Repair and ConfirmationObserve the symptom carefully. Check if there are also
other problems.
In determining the probable causes, it is necessary to
study the wiring diagram to understand the circuit as a
system. Knowledge of switches, relays and other parts is
necessary for accurate analysis. The causes of similar
problems in the past must be taken into account.
Troubleshooting is carried out by making step-by-step
checks until the cause is found.
After the problems are corrected, be sure to check that the
system operates correctly. Also check that new problems
have not been caused by the repair.
AC
1
Observation of Problem Symptoms



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ACX00948
AB
POWER SUPPLY
FUSE
LIGHTRELAY
SWITCH
ON
OFFON
OFF
AC308621AB
COVER
SPRING
IRON
CORE
COIL
IRON
PIECE
CONTACT
NORMALLY OPEN (NO) TYPE
ENERGIZED STATE
AC310636AB
NORMALLY OPEN (NO) TYPE
DEENERGIZED STATE ENERGIZED STATE
CURRENT FLOWS
CURRENT DOES
NOT FLOW43
21
4 3
2 1
AC310637AB
43
2 1
43
2 1 NORMALLY CLOSED (NC) TYPE
DEENERGIZED STATE
ENERGIZED STATE
CURRENT FLOWS
CURRENT DOES
NOT FLOW




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BATTERY IGNITION SWITCH (IG1)
JOINT
CONNECTOR (1)JOINT
CONNECTOR (3) RELAY
BOXJUNCTION
BLOCK
COMBINATION
METER
JOINT
CONNECTOR (4)
ABS/TCL-ECU
AC307013
"TCL OFF" Indicator Light and TCL Work Indicator Light Drive Circuit
AB




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AC307014
FRONT-ECU
RELAY
BOXABS/TCL-ECU
TAILLIGHT
RELAY
JOINT
CONNECTOR (1)
JUNCTION
BLOCK
TCL SWITCH
RHEOSTAT
BLACK
BLACKBLACK-
YELLOW BLACK-
YELLOW
ORANGEGREEN-
WHITE GREEN-
WHITEGREEN-
WHITEGREEN-
WHITE
ORANGE
TCL Switch System Circuit
AB






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AC307444
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GREEN
STOPLIGHT
GREEN
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STOPLIGHT
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Stoplight Switch System Circuit





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AC305231AO
CONNECTOR: C-30
C-30
C-30 HARNESS
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COMPONENT SIDE
AC305713AB
BATTERY
RELAY BOX
FUSE NUMBER 11
(HOUSING COLOR:
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AC305713AB
BATTERY
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FUSE NUMBER 11
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AC305032
PCM
GROUND
TERMINAL
AC
RELAY BOX
AC305412AB
MB991910
DATA LINK
CONNECTOR
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AC600839
IGNITION SWITCH (IG1)
JUNCTION
BLOCK
BLACK-
WHITE
COMBINATION
METER
RHEOSTAT
CIRCUIT
BLACK-
WHITERHEOSTAT
BLACK-
WHITE BLACKBLACK BLACK
RED
BLACK-
YELLOW
BLACK
POWERTRAIN
CONTROL
MODULE (PCM)
RED-
YELLOW RED
BATTERY
RELAY
BOX
WHITE WHITE
RED-
WHITE
JOINT
CONNECTOR (1)
RED-
WHITE
RED-
WHITE
BLACKRED
JOINT
CONNECTOR (2)
JOINT
CONNECTOR (3)
ABS-ECU OR
ABS/TCL-ECU
Auto-cruise Control Indicator Light Drive Circuit
AB






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AK300555
FUEL TANK DIFFERENTIAL
PRESSURE SENSOR
LIQUID SEPARATOR
EVAPORATIVE
EMISSION
CANISTER EVAPORATIVE
EMISSION
PURGE
SOLENOID
ON: OPEN PCM
BAROMETRIC PRESSURE
SENSOR
INTAKE AIR TEMPERATURE
SENSOR
ENGINE COOLANT
TEMPERATURE SENSOR
MASS AIRFLOW SENSORFUEL
TANK
MFI RELAYFUEL OVERFLOW
LIMITER VALVE
FUEL CUT
OFF VALVE LEVELING VALVE
EVAPORATIVE EMISION
VENTILATION VALVE
AIR FILTER EVAPORATIVE EMISSION
VENTILATION SOLENOID
ON: CLOSED
AB