Lexus RX300 (MCU15). Manual — part 255
DI–252
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
LEXUS RX300 (RM785E)
DTC
C1223 / 43
ABS Control System Malfunction
CIRCUIT DESCRIPTION
DTC No.
DTC Detecting Condition
Trouble Area
C1223 / 43
ABS control system is abnormal.
ABS control system
INSPECTION PROCEDURE
1
Check the DTC for the ABS (See page DI–205).
*1
Repair ABS control system according to the
code output.
*2
Check for ECU connected to malfunction in-
dicator light.
*1: Output NG code
*2: Malfunction indicator light remains ON
DI1H3–09
F02660
Engine and ECT ECU
Skid Control ECU
E10
NEO
7
A22
16
NEO
L–O
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
DI–253
LEXUS RX300 (RM785E)
DTC
C1224 / 44
NE Signal Circuit
CIRCUIT DESCRIPTION
The skid control ECU receives engine revolution speed signals (NE signals) from the engine and ECT ECU.
DTC No.
DTC Detecting Condition
Trouble Area
C1224 / 44
At vehicle speed of 30 km/h (19 mph) or more, when data
receiving from the engine and ECT ECU is in normal condi-
tion, and open or short circuit for engine revolution signal
circuit continues for 10 sec. or more.
S NEO circuit
S Engine and ECT ECU
WIRING DIAGRAM
DI1H4–10
F02807
ON
NEO
(+)
(–)
F03007
(Reference)
3 – 6 V
Below 1 V
DI–254
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
LEXUS RX300 (RM785E)
INSPECTION PROCEDURE
1
Check for open and short circuit in harness and connector between terminal
NEO of skid control ECU and terminal NEO of engine and ECT ECU
(See page IN–32).
NG
Repair or replace harness and connector.
OK
2
Check voltage between terminals NEO of skid control ECU and body ground.
PREPARATION:
(a)
Remove skid control ECU with connectors still con-
nected.
(b)
Turn ignition switch ON.
CHECK:
Measure voltage between terminal NEO of skid control ECU
and body ground for the engine conditions below.
OK:
Engine condition
Voltage
OFF (IG ON)
3 – 6 V or below 1 V
ON (Idling)
3 – 6 V ↔ below 1 V (Pulse)
NG
Check and replace skid control ECU or engine
and ECT ECU.
OK
If the same codes is still output after the DTC is deleted, check the contact condition of each con-
nection.
F13428
IG
SS1+
SS1–
ESS
14
ECU–IG
1C
23
A23 SS1+
4
SS1–
Instrument Panel J/B
ALT
Skid Control ECU
B–R
Steering Angle Sensor
2
6
3
2
LG–B
LG
1
B–Y
W–L
IG
AM1
1D
10
A23
7
Ignition Switch
1C
6
2
1
1
1A
W
Instrument Panel J/B
5
3
FL Block
Battery
J9
Junction
Connector
A
W–B
IG1 AM1
W
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
DI–255
LEXUS RX300 (RM785E)
DTC
C1231 / 31
Steering Angle Sensor Circuit
CIRCUIT DESCRIPTION
DTC No.
DTC Detecting Condition
Trouble Area
C1231 / 31
The condition that the data is not transmitted to the steering
angle sensor continues for more than 1.2 sec.
S Steering angle sensor
S Steering angle sensor circuit
WIRING DIAGRAM
DI1H5–06
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст