Lexus ES300 (1997 year). Manual — part 250
V08433
8
SPEEDOMETER
Replace circuit plate. Then recheck system.
COMBINATION
METER
Yes
No
Does odometer operate while driving?
Jack up the vehicle. Turn ignition switch ON.
Rotate propeller shaft. Does the voltage between
terminals C10 and ground change (approx. 0V to 5V
or more) per revolution of propeller shaft?
Disconnect connectors ”A” and ”C” from meter.
Inspect connector on wire harness side as follows.
HINT : While carrying out the following inspection, make certain that the connectors and terminals are properly con-
nected.
INSPECT ODOMETER OPERATION
See chart 18.
ECM
HINT : While carrying out the following inspection, make certain that the connectors and terminals are properly con-
nected.
Replace circuit plate. Then recheck system.
Remove meter with connector connected.
Inspect connector ”C” from back side as follows.
Wire harness between terminal C10 of meter and*ECU
faulty.
Power Steering ECU
* : An electrical tester availble to measure frrequency
is necessary for this inspection.
REFERENCE : TOYOTA ELECTRICAL TESTER
(09082–00050)
Suspension ECU
ABS and TRAC ECU
With engine running, does voltage between terminals
A13 and C10 fluctuate?
Cruise Control ECU
Yes
No
9
Vehicle speed signal (4P) faulty
Tachometer dose not operate while
engine running.
TACHOMETER
Yes
No
* INSPECT TACHOMETER CIRCUIT
Wire harness faulty between terminal A13 of meter
and igniter.
BE–64
–
BODY ELECTRICAL
COMBINATION METER
1448
1997 LEXUS ES300 (RM511U)
V08434
COMBINATION METER
Yes
No
Disconnect connector ”D” from meter.
Inspect connector on wire harness side as follows.
HINT : While carrying out the following inspection, make certain that the connectors and terminals are properly con-
nected.
Yes
Yes
Yes
No
No
No
Is operation normal?
Replace receiver gauge. Then recheck system.
Is there continuity (no resistance ) between terminal
D12 and ground?
Are speedometer and tachometer operating normally?
Replace combination
meter computer.
Then recheck system.
Open circuit in wire
harness between terminal
12 of meter and ground.
Ground faulty.
Wire harness faulty between meter and sender gauge.
Replace sender gauge. Then recheck system.
Is operation normal?
Is resistance normal?
Replace combination meter computer.
Then recheck system.
INSPECT SENDER GAUGE OPERATION
(See page
INSPECT RECEIVER GAUGE RESISTANCE
(See page
INSPECT RECEIVER GAUGE OPERATION
(See page
FUEL GAUGE
Does not operate or operation is
abnormal.
10
Yes
No
–
BODY ELECTRICAL
COMBINATION METER
BE–65
1449
1997 LEXUS ES300 (RM511U)
V08435
Disconnect connector ”D” from meter.
Inspect connector on combination meter side as
follows.
HINT : While carrying out the following inspection, make certain that the connectors and terminals are properly con-
nected.
Yes
Replace combination
meter computer.
Then recheck system.
Yes
Yes
Yes
No
No
No
No
Yes
Is bulb OK?
INSPECT FUEL LEVEL WARNING LIGHT
(See page
Replace bulb.
Then recheck system.
Ground terminal D11 and turn ignition switch ON.
Does fuel level warning light up?
Replace circuit plate.
If operation is not as specified, replace the switch.
Then recheck system.
Wire harness faulty between terminal D11 of
meter and terminal 1 of sender gauge.
Temporarily install another circuit plate.
Is operation normal?
INSPECT FUEL LEVEL WARNING SWITCH
(See page
11
FUEL LEVEL WARNING
Warning light does not light up or always
lights up.
Is operation normal?
BE–66
–
BODY ELECTRICAL
COMBINATION METER
1450
1997 LEXUS ES300 (RM511U)
V08436
Disconnect connector ”A” from meter.
Inspect connector on wire harness side.
HINT : While carrying out the following inspection, make certain that the connectors and terminals are properly con-
nected.
Yes
No
Wire harness faulty between terminal A1 of meter
and ground.
No
No
No
No
Yes
Yes
INSPECT RECEIVER GAUGE OPERATION
(See page
)
Yes
Yes
INSPECT RECEIVER GAUGE RESISTANCE
(See page
)
Wire harness faulty between terminal A3 of meter
and sender gauge.
Sender gauge ground condition faulty.
Replace sender gauge. Then recheck system.
INSPECT SENDER GAUGE GROUND CONDITION
Is there continuity (no resistance) between gauge
body and engine block?
Is resistance normal?
Is there continuity between terminal A3 and ground?
Replace receiver gauge. Then recheck system.
Is there continuity between terminal A1 and ground?
Replace combination meter computer.
Then recheck system.
COMBINATION
METER
12
ENGINE COOLANT TEMPERATURE
GAUGE
Does not operate or operation is
abnormal.
Is operation normal?
–
BODY ELECTRICAL
COMBINATION METER
BE–67
1451
1997 LEXUS ES300 (RM511U)
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