Lexus ES300 (2002 year). Manual — part 376

05-8

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

161

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

(5)

See page

05-18

to confirm the details of the

DTC.

NOTICE:

When simulating symptoms with an OBD II scan tool
(excluding hand-held tester) to check the DTC, use
the normal mode. For code on the DTC chart subject
to ”2 trip detection logic”, perform the following ei-
ther action.

Turn the ignition switch OFF after the symptom is
simulated the 1st time. Then repeat the simulation
process again. When the problem has been simulated
twice, the MIL lights up and the DTCs are recorded in
the ECM.

Check the 1st trip DTC using Mode 7 (Continuous Test
Results) for SAE J1979.

(c)

Clear the DTC.
The DTCs and freezed frame data will be erased by either
action.

Operating the OBD II scan tool (complying
with SAE J1978) or hand-held tester to erase
the codes. (See the OBD II scan tool’s
instruction book for operating instructions.)

Disconnecting the battery terminals or E.F.I.
fuse and ETCS fuse more than 30 second.

NOTICE:
If the hand-held tester switches the ECM from the normal
mode to the check mode or vice-versa, or if the ignition
switch is turned from ON to ACC or OFF during the check
mode, the DTCs and freezed frame data will be erased.
3.

INSPECT DIAGNOSIS (Check Mode)

HINT:
Hand-held tester only:
Compared to the normal mode, the check mode has an in-
creased sensitivity to detect malfunctions.
Furthermore, the same diagnostic items which are detected in
the normal mode can also be detected in the check mode.
(a)

Check the DTC.
(1)

Initial conditions.

Battery positive voltage 11 V or more

Throttle valve fully closed

Transmission in P or N position

A/C switched OFF

(2)

Turn the ignition switch OFF.

(3)

Prepare the hand-held tester.

(4)

Connect the hand-held tester to the DLC3 at the
lower center of the instrument panel.

(5)

Turn the ignition switch ON and push the hand-held
tester switch ON.

(6)

Switch the hand-held tester from the normal mode
to the check mode (Check that the MIL flashes.).

FI3605

Flashing

ON

OFF

0.13 Seconds

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DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-9

162

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

NOTICE:
If the hand-held tester switches the ECM from the normal
mode to the check mode or vice-versa, or if the ignition
switch is turned from ON to ACC or OFF during the check
mode, the DTC and freezed frame data will be erased.

(7)

Start the engine (The MIL goes out after the engine
start.).

(8)

Simulate the conditions of the malfunction de-
scribed by the customer.

NOTICE:
Leave the ignition switch ON until you have checked the
DTC, etc.

(9)

After simulating the malfunction conditions, use the
hand-held tester diagnosis selector to check the
DTC and freezed frame data, etc.

HINT:
Take care not to turn the ignition switch OFF. Turning the ignition
switch OFF switches the diagnosis system from the check
mode to the normal mode, so all DTC, etc. are erased.

(10) After checking the DTC, inspect the applicable cir-

cuit.

(b)

Clear the DTC.
The following actions will erase the DTCs and freezed
frame data.

Operating the hand-held tester to erase the
codes. (See the hand-held tester’s instruc-
tion book for operating instructions.)

Disconnecting the battery terminals or E.F.I.
fuse and ETCS fuse more than 30 second.

NOTICE:
If the hand-held tester switches the ECM from normal
mode to check mode or vice-versa, or if the ignition switch
is turned from ON to ACC or OFF during check mode, the
DTCs and freezed frame data will be erased.

05-10

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DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

163

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

4.

FAIL-SAFE CHART

If any of the following codes is recorded, the ECM enters fail-safe mode.

DTC No.

Fail-Safe Operation

Fail-Safe Deactivation Conditions

P0100

Ignition timing fixed at 10

° BTDC

Returned to normal condition

P0110

Intake air temp. is fixed at 20

°

C (68

°

F)

Returned to normal condition

P0115

Engine coolant temp. is fixed at 80

°C (176°F)

Returned to normal condition

P0141

P1135

P1155

The heater circuit in witch an abnormality is detected is
turned off

Ignition switch OFF

P0325
P0330

Max. timing retardation

Ignition switch OFF

P1300
P1305

P1310

P1315

P1320

P1325

Fuel cut

Returned to normal condition

5.

CHECK FOR INTERMITTENT PROBLEMS

Hand-held tester only:
By putting the vehicle’s ECM in the check mode, 1 trip detection logic is possible instead of 2 trip detection
logic and sensitivity to detect open circuits is increased. This makes it easier to detect intermittent problems.

(1)

Clear the DTC (See step 2.)

(2)

Set the check mode (See step 2.)

(3)

Perform a simulation test (See page

01-21

).

(4)

Check the connector and terminal (See page

01-31

).

(5)

Handle the connector (See page

01-31

).

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DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-1 1

164

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

6.

DATA LIST

HINT:
According to the DATA LIST displayed by the OBD II scan tool or Hand-held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as a first step of
troubleshooting is one of the method to shorten the labor time.
(a)

Warm up the engine.

(b)

Turn the ignition switch OFF.

(c)

Connect the OBD II scan tool or Hand-held tester to the DLC3.

(d)

Turn the ignition switch ON.

(e)

According to the display on tester, read the ”DATA LIST”.

Item

Measurement Item/Range

(Display)

Normal Condition

Diagnostic Note

INJECTOR

Injection period/

Min.: 0 ms, Max.: 32.64 ms

Idling: 1.6 - 2.9 ms

IGN ADVANCE

Ignition timing advance/

Min.: -64 deg., Max.: 63.5 deg.

Idling: BTDC 10 - 25 deg.

CALC LOAD

Calculated load by engine ECM/

Min.: 0 %, Max.: 100 %

Idling: 13.1 - 18.7 %

Racing without load(2500 rpm):
11.7 - 17.3 %

MAF

Air flow rate from MAF sensor/

Min.: 0 gm/s, Max.: 655 gm/s

Idling: 3.3 -

4.7

gm/sec.

Racing without load (2,500 rpm):
10.4 - 15.4 gm/sec.

ENGINE SPD

Engine Speed/

Min.: 0 rpm, Max.: 16383 rpm

Idling: 650 -

750

rpm

COOLANT TEMP

Coolant temperature/

Min.: -40

C, Max.: 140

C

After warming up:
80 -

95

°

C (176 - 203

°F)

If the value is ”-40

C” or ”140

C”

i

it i

INTAKE AIR

Intake air temperature/

Min.: -40

C, Max.: 140

C

Equivalent to Ambient Temp.

C”, sensor circuit is open or

shorted.

THROTTLE POS

Absolute throttle position sensor/

Min.: 0 %, Max.: 100 %

Throttle fully closed: 8 - 20 %

Throttle fully open: 64 - 96 %

VEHICLE SPD

Vehicle speed/

Min.: 0 km/h, Max.: 255 km/h

Vehicle stopped: 0 km/h (0 mph)

O2S B1 S2

Oxygen sensor output voltage of

the bank 1 sensor 2/

Min.: 0 V, Max.: 1.275 V

D i i

0 05 0 95 V

O2S B2 S2

Oxygen sensor output voltage of

the bank 2 sensor 2/

Min.: 0 V, Max.: 1.275 V

Driving: 0.05 -

0.95

V

AFS B1 S1

A/F sensor output voltage of the

bank 1 sensor 1/

Min.: 0 V, Max.: 7.999 V

Idli

2 8 3 8 V

AFS B2 S1

A/F sensor output voltage of the

bank 2 sensor 1/

Min.: 0 V, Max.: 7.999 V

Idling: 2.8 -

3.8

V

SHORT FT #1

Short term fuel trim of bank 1/

Min.: -100 %, Max.: 100%

0

±

20 %

LONG FT #1

Long term fuel trim of bank 1/

Min.: -100 %, Max.: 100 %

0

±

20 %

TOTAL FT #1

Total fuel trim of bank 1/

Min.: 0.5, Max.: 1.496

Idling: 0.5 - 1.4

SHORT FT #2

Short term fuel trim of bank 2/

Min.: -100 %, Max.: 100 %

0

±

20 %