Lexus RX300 (MCU15). Manual — part 252
F00042
1
3
4
6
Open
(+)
(–)
1
2
3
4
4
5
6
1
2
3
2
5
6
5
Continuity
Continuity
Continuity
Open
DI–240
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
LEXUS RX300 (RM785E)
3
Check ABS solenoid relay.
CHECK:
Check continuity between each terminal of ABS solenoid relay.
OK:
Terminals 4 and 6
Continuity
(Reference value 80 Ω)
Terminals 2 and 3
Continuity
Terminals 1 and 3
Open
CHECK:
(a)
Apply battery voltage between terminals 4 and 6.
(b)
Check continuity between each terminal of ABS solenoid
relay.
OK:
Terminals 2 and 3
Open
Terminals 1 and 3
Continuity
NG
Replace ABS solenoid relay.
OK
F07134
ABS Solenoid
Relay
3
5
5
6
ECU
R/B No. 2
A20
A7
4
4
A7
Brake Actuator
AST
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
DI–241
LEXUS RX300 (RM785E)
4
Check continuity between terminals 3 of ABS solenoid relay and each solenoid
terminal of skid control ECU.
CHECK:
Check continuity between terminal 3 of R/B No. 2 (for ABS sole-
noid relay) and terminal AST of skid control ECU
OK:
Continuity
HINT:
There is a resistance of 26 – 40 Ω between terminals A7 – 4 and
A7 – 5 of brake actuator.
NG
Repair or replace harness or brake actuator.
OK
5
Check for open and short circuit in harness and connector between ABS sole-
noid relay and skid control ECU (See page IN–32).
NG
Repair or replace harness or connector.
OK
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection. If the connections are normal, the ECU may be defective.
DI–242
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
LEXUS RX300 (RM785E)
DTC
C1201 / 51
Engine Control System Malfunction
CIRCUIT DESCRIPTION
If any trouble occurs in the engine control system, the ECU prohibits BA & TRC & VSC control.
DTC No.
DTC Detecting Condition
Trouble Area
C1201 / 51
The engine speed is 500 rpm or more and ENG malfunction
signal continuously occurs for 5 sec. or more.
Engine control system
INSPECTION PROCEDURE
1
Check the DTC for the engine (See page DI–3).
*1
Repair engine control system according to the
code output.
*2
Check for engine and ECT ECU connected to
malfunction indicator light.
*1: Output NG code
*2: Malfunction indicator light remains ON
DI1GY–09
F13426
18
Instrument Panel J/B
22
Brake
Warning Light
Combination
Meter
Brake Fluid Level
Warning Switch
Skid Control ECU
LBL
J9
Junction
Connector
IJ1
II1
A
2
A23
C10
B–Y
BRL
1
1
W–L
AM1
W–B
A23
11
R–W (*2)
G
R–W
C12
1
R–W
HEATER
5
7
2
4
Ignition Switch
1C
6
2
1
Instrument Panel J/B
*1 : LHD
*2 : RHD
G
J/B No. 3
1
3E
3A
13
1K
1C
14
9
1D
1B
W–B
R–W (*2)
26
R–W (*1)
IG
Instrument Panel J/B
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
DI–243
LEXUS RX300 (RM785E)
DTC
C1202 / 52
Brake Fluid Level Warning Switch
Circuit
CIRCUIT DESCRIPTION
The brake fluid level warning switch sends the appropriate signal to the ECU when the brake fluid level drops.
HINT:
Depress the parking brake pedal and also turns on the brake warning light but does not diagnose DTC No.
C1202 / 52.
DTC No.
DTC Detecting Condition
Trouble Area
C1202 / 52
ECU terminal IG1 voltage is 9.5 V to 17.2 V and open cir-
cuit for the brake fluid level warning switch circuit continues
for 2 sec. or more.
S Brake fluid level
S Brake fluid level warning switch
S Brake fluid level warning switch circuit
WIRING DIAGRAM
DI1GZ–11
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст