Lexus ES300 (1997 year). Manual — part 183
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)
V08437
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
Wire harness faulty between terminal B3 of meter
and terminal 1 of low oil pressure warning switch.
No
COMBINATION
METER
13
LOW OIL PRESSURE WARNING
Abnormal operation or warning light
does not light up.
Is GAUGE fuse normal?
Replace fuse. Then recheck system.
Open circuit in wire harness between GAUGE fuse
and meter.
Connect connector ”D” to meter.
Disconnect connector ”B” from meter.
Inspect connector on combination meter side as
follows.
Ground terminal B3 and turn ignition switch ON.
Does low oil pressure warning light light up?
Temporarily install another circuit plate.
Is operation normal?
Turn ignition switch ON.
Is there battery positive voltage between terminal
D3 and ground?
Is bulb OK?
Replace bulb.
Then recheck system.
Replace circuit plate.
Replace combination
meter computer.
Then recheck system.
INSPECT LOW OIL PRESSURE WARNING LIGHT
(See page
)
INSPECT LOW OIL PRESSURE WARNING SWITCH
(See page
)
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
If operation is not as specified, replace the switch.
Then recheck system.
Is operation normal?
BE–68
–
BODY ELECTRICAL
COMBINATION METER
1452
1997 LEXUS ES300 (RM511U)
V08438
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
Wire harness faulty between terminal A9 of meter and
1 Terminal 1 of parking brake switch.
2 Terminal 1 of brake fluid level warning switch.
No
COMBINATION
METER
Abnormal operation or warning light
does not light up.
Is GAUGE fuse normal?
Replace fuse. Then recheck system.
Open circuit in wire harness between GAUGE fuse
and meter.
Connect connector ”D” to meter.
Disconnect connector ”A” from meter.
Inspect connector on combination meter side as
follows.
Ground terminal A9 and turn ignition switch ON.
Does brake warning light light up?
Temporarily install another circuit plate.
Is operation normal?
Turn ignition switch ON.
Is there battery positive voltage between terminal
D3 and ground?
Is bulb OK?
Replace bulb.
Then recheck system.
Replace circuit plate.
Replace combination
meter computer.
Then recheck system.
INSPECT BRAKE WARNING LIGHT
(See page
INSPECT PARKING BRAKE SWITCH
(See page
No
No
No
Yes
Yes
If operation is not as specified, replace the switch.
Then recheck system.
Is operation normal?
INSPECT BRAKE FLUID LEVEL WARNING SWITCH
(See page
)
Is operation normal?
Yes
Yes
No
No
Yes
Yes
No
14
BRAKE WARNING
Replace brake fluid level warning switch.
Then recheck system.
–
BODY ELECTRICAL
COMBINATION METER
BE–69
1453
1997 LEXUS ES300 (RM511U)
V08439
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
No
COMBINATION
METER
Abnormal operation or warning light
does not light up.
Is GAUGE fuse normal?
Replace fuse. Then recheck system.
Open circuit in wire harness between GAUGE fuse
and meter.
Connect connector ”D” to meter.
Disconnect connector ”A” from meter.
Inspect connector on combination meter side as
follows.
Ground terminal A7 and turn ignition switch ON.
Does light failure warning light light up?
Temporarily install another circuit plate.
Is operation normal?
Turn ignition switch ON.
Is there battery positive voltage between terminal
D3 and ground?
Is bulb OK?
Replace bulb.
Then recheck system.
Replace circuit plate.
Replace combination
meter computer.
Then recheck system.
INSPECT LIGHT FAILURE SENSOR CIRCUIT
(See page
No
No
No
Yes
Yes
Yes
Yes
No
REAR LIGHTS WARNING
15
If circuit is as specified, replace the sensor.
Then recheck system.
BE–70
–
BODY ELECTRICAL
COMBINATION METER
1454
1997 LEXUS ES300 (RM511U)
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