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 

DI–911

).

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 

BR–52

).

NOTICE:
When replacing the skid control ECU, perform zero point calibration (See page 

DI–897

).

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 

IN–35

).

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 

DI–911

).

(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 

BR–52

).

NOTICE:
When replacing the skid control ECU, perform zero point calibration (See page 

DI–897

).

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