Lexus RX300 (MCU15). Service manual — part 267
F13438
Skid Control ECU
Ts
3
11
DLC3
W–B
IF
4
14
CG
5B
J/B No. 5
A22
4
W–B
Ts
5B
W–L
DI–300
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
LEXUS RX300 (RM785E)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
In the sensor check mode, a malfunction of the speed sensor that cannot be judged when the vehicle is
stopped is judged while driving.
Transition to the sensor check mode can be performed by connecting terminals Ts and CG of the DLC3 and
turning the ignition switch from OFF to ON.
WIRING DIAGRAM
DI0X6–11
F09679
DLC3
Ts
CG
ON
(+)
(–)
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
DI–301
LEXUS RX300 (RM785E)
INSPECTION PROCEDURE
1
Check voltage between terminals Ts and CG of DLC3.
CHECK:
(a)
Turn the ignition switch ON.
(b)
Measure voltage between terminals Ts and CG of DLC3.
OK:
Voltage: 10 – 14 V
OK
If ABS warning light does not blink even after Ts
and CG have been connected, the ECU may be
defective.
NG
2
Check for open and short circuit in harness and connector between skid control
ECU and DLC3, DLC3 and body ground (See page IN–32).
NG
Repair or replace harness or connector.
OK
Check and replace skid control ECU.
F13953
DI–302
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
LEXUS RX300 (RM785E)
Check for Fluid Leakage
Check for fluid leakage from actuator or hydraulic lines.
DI1HC–13
DI6OW–08
Warning Light Check
P. DI–305
END
: Diagnostic steps permitting the use
of the hand–held tester.
P. DI–304
P. DI–305
Symptom Simulation
Normal
DTC Check
Warning Light
ON
Malfunction Code
Warning Light
Remains OFF
Circuit Inspection
Identification of Problem
Repair
Warning Light Check
P. DI–305
DTC Check (Read Past DTC)
Confirmation Test
Remains ON
Remains OFF
Clear DTC (Present and Past DTC)
Items inside are titles of pages in this manual,
with the page number in the bottom portion. See the
pages for detailed explanations.
1
2
4
3
5
7
8
9
10
DTC Chart
11
6
P. DI–311
P. IN–22
P. DI–318 to DI–439
Remains OFF
Remains ON
Vehicle Brought to Workshop
Customer Problem Analysis
DTC Check (Read Present DTC)
Step 3, 4, 6, 8, 9, 11
P. DI–305
DTC Check (Read Past DTC)
P. DI–305
P. DI–305
P. DI–305
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–303
LEXUS RX300 (RM785E)
SUPPLEMENTAL RESTRAINT SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
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