Lexus SC300 / Lexus SC400. Manual — part 229

BR–168

BR–170

BR–172

BR–228

BR–170

BR–172

BR–186

~

BR–226

BR–170

IN–22

–

BRAKE SYSTEM

TRACTION CONTROL SYSTEM (TRAC)

BR–167

CUSTOMER PROBLEM ANALYSIS CHECK SHEET

BR–168

–

BRAKE SYSTEM

TRACTION CONTROL SYSTEM (TRAC)

MEMO–

–

BRAKE SYSTEM

TRACTION CONTROL SYSTEM (TRAC)

BR–169

DIAGNOSIS SYSTEM

INDICATOR CHECK
When the ignition switch is turned on, check that the TRAC
indicator light goes on for 3 seconds.
HINT: If the indicator check result is not normal, proceed to
troubleshooting for the TRAC indicator light circuit (see page

BR–225

).

DIAGNOSTIC TROUBLE CODE CHECK

1.

Turn the ignition switch ON.

2.

Using SST, connect terminals Tc and E1 of DLC2 or DLC
1.
SST 09843–18020

3. Read

the

diagnostic

trouble

code

from

the

TRAC

indicator light on the combination meter.
HINT: If no code appears, inspect the diagnostic circuit or
TRAC indicator light circuit (

BR–226

or

BR–225

).

As an example, the blinking patterns for normal code and
codes 11 and 21 are shown on the left.

4.

Codes are explained in the code table on the next page.

5.

After completing the check, disconnect terminals Tc and
E1, and turn off the display.
If two or more malfunctions are indicated at the same time,
the lowest numbered diagnostic trouble code will be dis-
played 1st.

ECU DATA MONITOR USING LEXUS
HAND–HELD TESTER

1.

Hook up the LEXUS hand–held tester to the DLC2.

2.

Monitor the ECU data by following the prompts on the
tester screen.
HINT: LEXUS hand–held tester has a “Snapshot” function
which records the monitored data.
Please refer to the LEXUS hand–held tester operator’s
manual for further details.

BR–170

–

BRAKE SYSTEM

TRACTION CONTROL SYSTEM (TRAC)