Lexus SC300 / Lexus SC400. Manual — part 278
DTC
62
TRAC Vehicle Speed Malfunction
CIRCUIT DESCRIPTION
DTC No.
DTC Detecting Condition
Trouble Area
62
Detection of any of conditions (1) through (3):
At vehicle speed of 10 km/h (6 mph) or more, pulses
are not input for 5 sec.
ECU
HINT: When DTC Nos. 31–36 are recorded in memory, DTC No. 62 is not recorded.
DIAGNOSTIC CHART
DIAGNOSTIC CHART
BR–140
–
BRAKE SYSTEM
ANTI–LOCK BRAKE SYSTEM (ABS)
–MEMO–
–
BRAKE SYSTEM
ANTI–LOCK BRAKE SYSTEM (ABS)
BR–141
).
).
).
WIRING DIAGRAM
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
The stop light switch senses whether the brake pedal is depressed or released, and sends a signal to the ECU.
DIAGNOSTIC CHART
DIAGNOSTIC CHART
BR–142
–
BRAKE SYSTEM
ANTI–LOCK BRAKE SYSTEM (ABS)
OK
NG
NG
OK
OK
NG
INSPECTION PROCEDURE
1
Check operation of stop light.
Check that stop light lights up when brake pedal is depressed and turns off when brake pedal is re-
leased.
C
Repair stop light circuit (See page
2
Check voltage between terminal STP of ABS (& TRAC) ECU and body ground.
C
OK
P
Remove ABS (& TRAC) ECU with connectors still con-
nected.
Measure voltage between terminal STP of ABS (&
TRAC) ECU and body ground when brake pedal is de-
pressed.
Voltage:
8 – 14 V
Proceed to next circuit inspection shown on problem
symptoms chart (See page
).
3
Check for open in harness and connector between ABS (& TRAC) ECU and stop light switch
(See page
Repair or replace harness or connector.
Check and replace ABS (& TRAC) ECU.
–
BRAKE SYSTEM
ANTI–LOCK BRAKE SYSTEM (ABS)
BR–143
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст