Lexus ES300 (1997 year). Manual — part 387

AB0056

Code 11 and 31

ON

OFF

0.5

2.5

4.0

1.5

0.5

Code 11

Code 31

Repeat

W04000

LEXUS hand–held tester

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–325

477

1997 LEXUS ES300 (RM511U)

DTC. After a 1.5 second pause, the second blinking out-
put will indicate the second digit.

If there are 2 or more codes, there will be a 2.5 second
pause between each code. After all the codes have been
output, there will be a 4.0 second pause and they will all
be repeated.

HINT:

In the event of a number of trouble codes, indication will
start from the smallest numbered code.

If it does not output a DTC or outputs a DTC without termi-
nal connection, proceed to the Tc terminal circuit inspec-
tion on page

DI–367

.

3.

DTC CHECK (Using LEXUS hand–held tester)

(a)

Hook up the LEXUS hand–held tester to the DLC1 or
DLC2.

(b)

Read the DTCs by following the prompts on the tester
screen.

HINT:Please refer to the LEXUS hand–held tester operator’s
manual, for further details.
4.

DTC CLEARANCE
When the ignition switch is turned off, the diagnostic
trouble code is cleared.

5.

RELEASE METHOD OF AIRBAG ACTIVATION PRE-
VENTION MECHANISM
An airbag activation prevention mechanism is built into
the connector for the squib circuit of the SRS.
When release of the airbag activation prevention mecha-
nism is directed in the troubleshooting procedure, as
shown in the illustration of the connectors ”1” and ”3” be-
low, insert paper which is the same thickness as the male
terminal, between the terminal and the short spring.

CAUTION:NEVER RELEASE the airbag activation preven-
tion mechanism on the steering wheel pad connector.
NOTICE:

Do not release the airbag activation prevention mech-
anism unless specifically directed by the trouble-
shooting procedure.

If the paper inserted is too thick the terminal and short
spring may be damaged, so always use paper the
same thickness as the male terminal.

W01805

W03146 W03147

AB0130 AB0045 AB0046

H00067

Connector ”1”

Connector ”2”

Connector ”3”

Front Passenger
Airbag Assembly

Airbag Sensor
Assembly

Connector ”5”

No.1 J/B

Spiral Cable

Connector ”4”

Steering Wheel
Pad (Squib)

Airbag Sensor Assembly Connector (Connector ”1”)

Before Release

After Release

Short Spring

Spiral Cable Connector (Connector ”3”)

Short Spring

Before Release

After Release

Paper

DI–326

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

478

1997 LEXUS ES300 (RM511U)

DI0AW–01

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–327

479

1997 LEXUS ES300 (RM511U)

DIAGNOSTIC TROUBLE CODE CHART

If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below (Proceed to the page given for that circuit.).

DTC No.

(See Page)

Detection Item

Trouble Area

SRS

Warning Light

N

l

System normal

–

OFF

Normal

(

DI–359

)

Voltage source drop

Battery

Airbag sensor assembly

ON

11

(

DI–331

)

Short in squib circuit (to ground)

Squib (driver airbag and front passenger airbag)

Spiral cable

Airbag sensor assembly

Wire harness

ON

12

(

DI–337

)

Short in squib circuit (to B+)

Squib (driver airbag and front passenger airbag)

Spiral cable

Airbag sensor assembly

Wire harness

ON

13

(

DI–343

)

Short in D squib circuit

Steering wheel pad (squib)

Spiral cable

Airbag sensor assembly

Wire harness

ON

14

(

DI–347

)

Open in D squib circuit

Steering wheel pad (squib)

Spiral cable

Airbag sensor assembly

Wire harness

ON

31

(

DI–351

)

Airbag sensor assembly malfunction

Airbag sensor assembly

ON

53

(

DI–353

)

Short in P squib circuit

Front passenger airbag assembly (squib)

Airbag sensor assembly

Wire harness

ON

54

(

DI–356

)

Open in P squib circuit

Front passenger airbag assembly (squib)

Airbag sensor assembly

Wire harness

ON

HINT:

When the SRS warning light remains lit up and the DTC is the normal code, this means a voltage source
drops.
This malfunction is not stored in memory by the airbag sensor assembly and if the power source volt-
age returns to normal, the SRS warning light will automatically go out.

When 2 or more codes are indicated, the codes will be displayed in numeral order starting from the
lowest numbered code.

If a code not listed on the chart is displayed, the airbag sensor assembly is faulty.

DI0AX–01

W03630

Front Passenger Airbag Assembly

Steering Wheel Pad

Spiral Cable

Airbag Sensor Assembly

DI–328

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

480

1997 LEXUS ES300 (RM511U)

PARTS LOCATION