Lexus RX300 (MCU15). Manual — part 327
DI–540
–
DIAGNOSTICS
COMBINATION METER SYSTEM
LEXUS RX300 (RM785E)
Washer level warning light does not light up.
1. Bulb circuit
2. Window washer level warning switch
3. Combination meter
DI–551
BE–68
IN–32
Rear Lights warning light does not light up.
1. Bulb circuit
2. Light failure relay
3. Combination meter
DI–551
BE–68
IN–32
Engine oil level warning light does not light up.
1. Bulb circuit
2. Engine oil level warning sensor
3. Combination meter
DI–551
BE–68
IN–32
Any indicator lights does not light up.
1. Bulb circuit
2. Combination meter ECU power source circuit
3. Combination meter
DI–551
DI–549
IN–32
DI1RB–04
–
DIAGNOSTICS
COMBINATION METER SYSTEM
DI–541
LEXUS RX300 (RM785E)
CIRCUIT INSPECTION
Speedometer
INSPECTION PROCEDURE
HINT:
If there is not the hand–held tester, begin with STEP 2.
1
Perform active test.
PREPARATION:
Connect the hand–held tester to the DLC3.
CHECK:
(a)
Enter into ACTIVE TEST function of hand–held tester.
(b)
Check that the probe moves as hand–held tester directs in each range.
OK:
The meter operates normally.
OK
Replace A/C and combination meter intagrated
ECU.
NG
2
Is any of DTC 31 to 35 output from ABS system?
Check DTC on page DI–205.
YES
Repair circuit indicated by output code.
NO
3
Check for open or short circuit in harness and connector between A/C and com-
bination meter integrated ECU and ABS & BA & TRC & VSC ECU.
NG
Repair or replace harness or connector.
OK
DI–542
–
DIAGNOSTICS
COMBINATION METER SYSTEM
LEXUS RX300 (RM785E)
4
Check speedometer (See page BE–68).
NG
Replace speedometer.
OK
Check and replace combination meter
circuit plate.
–
DIAGNOSTICS
COMBINATION METER SYSTEM
DI–543
LEXUS RX300 (RM785E)
Tachometer
INSPECTION PROCEDURE
HINT:
If there is not the hand–held tester, begin with STEP 2.
1
Perform active test.
PREPARATION:
Connect the hand–held tester to the DLC3.
CHECK:
(a)
Enter into ACTIVE TEST function of hand–held tester.
(b)
Check that the probe moves as hand–held tester directs in each range.
OK:
The meter operates normally.
OK
Replace A/C and combination meter intagrated
ECU.
NG
2
Check igniter signal circuit (See page DI–547).
NG
Check and repair igniter signal circuit.
OK
3
Check tachometer (See page BE–68).
NG
Replace tachometer.
OK
Check and replace combination meter circuit
plate.
DI1RC–04
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