Toyota Sequoia (2005). Manual — part 286
–
DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
DI–939
1133
INSPECTION PROCEDURE
1
Check brake fluid level.
CHECK:
Check the amount of fluid in the brake reservoir.
NG
Check and repair brake fluid leakage and add
fluid.
OK
2
Check DTC
of translate ECU
(translate DTC 58).
CHECK:
Check DTC of the translate ECU (See page
RESULT:
DTC 58 is not output
A
DTC 58 is output
B
B
Go to step 4.
A
3
Check for open and short circuit in harness and connector between skid control
ECU and translate ECU (CAN1 circuit).
NG
Repair or replace harness or connector
(CAN1 circuit).
OK
Replace skid control ECU
(See page
).
NOTICE:
When replacing the skid control ECU, perform zero point calibration (See page
).
F18069
DI–940
–
DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
1134
4
Check brake fluid level warning switch.
PREPARATION:
Disconnect the brake fluid level warning switch connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection
Switch Condition
Specified Condition
(B2–1) – (B2–2)
Float UP
10 k
Ω
or more
(No continuity)
(B2–1) – (B2–2)
Float DOWN
1
Ω
or less (Continuity)
NG
Replace brake reservoir tank.
OK
5
Check for open and short circuit in harness and connector between brake fluid
level warning switch and translate ECU (See page
NG
Repair or replace harness or connector.
OK
–
DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
DI–941
1135
6
Replace the translate ECU and check if trouble occurs again.
PREPARATION:
(a)
Clear the DTC (See page
(b)
Turn the ignition switch OFF.
CHECK:
Turn the ignition switch to the ON position, and check if the same DTC still remains in the memory.
RESULT:
DTC C1202/52 is output
A
DTC C1202/52 is not output
B
B
END
A
Replace skid control ECU
(See page
).
NOTICE:
When replacing the skid control ECU, perform zero point calibration (See page
).
F19770
Translate ECU
VSC–
VSC+
ENG–
ENG+
ABS & VSC Actuator
(Skid Control ECU)
7
T5
11
T5
14
T5
16
T5
7
IL2
6
IL2
L
W
L
W
6
S1
2
S1
CANH
CANL
R
W
L
W
1
J55
2
J55
1
J53
2
J53
J/C
33
E5
34
E5
CANH
CANL
ECM
(*1)
(*1)
(*2)
(*2)
(*1) CAN1 Circuit (*2) Vehicle CAN Circuit
(*1)
(*1)
(*2)
(*2)
DI–942
–
DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
1136
DTC
C1203 / 53 Malfunction in CAN1 Communication
CIRCUIT DESCRIPTION
This circuit is used to send TRAC & VSC control information from the skid control ECU to the ECM (CAN
communication system) and engine control information from the ECM to the skid control ECU (CAN commu-
nication system).
The skid control ECU and ECM are connected to each other via the translate ECU using the CAN commu-
nication system.
DTC No.
DTC Detecting Condition
Trouble Area
C1203 / 53
Data cannot be transmitted and/or received to/from ECM
from translate ECU for a fixed time.
Skid control ECU
CAN1 communication system
ECM
Translate ECU
WIRING DIAGRAM
DI93J–04
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