Content .. 58 59 60 61 ..

Toyota Corolla (2004+). Manual - part 60

05-121

DIAGNOSTICS

SFI SYSTEM (April, 2003)

TYPICAL ENABLING CONDITION

Specification

Item

Minimum

Maximum

The monitor will run whenever the follow-

See ”List of Disable a Monitor” (On page 05-25)

ing DTCs are not present

Time after following conditions are met:

50 seconds

Engine coolant temperature

40_C

Engine speed

1,400 rpm

Vehicle speed

25 mph (40 km/h)

Idle

OFF

Time after engine start

180 seconds

TYPICAL MALFUNCTION THRESHOLDS

Detection Criteria

Threshold

Front heated oxygen sensor voltage

less than 0.45 V

COMPONENT OPERATING RANGE

Parameter

Standard Value

In the normal condition, the font heated oxygen sensor volt-

0 to 1 V

age

WIRING DIAGRAM

Refer to DTC P0130 on page 05-101.

INSPECTION PROCEDURE

HINT:

Hand-held tester only:

Narrowing down the trouble area is possible by performing ”A/F CONTROL” ACTIVE TEST (heated oxygen

sensor or other trouble areas can be distinguished).

(a) Perform ACTIVE TEST using hand-held tester (A/F CONTROL).

HINT:

”A/F CONTROL” is the ACTIVE TEST which changes the injection volume to -12.5 % or +25 %.

(1)

Connect the hand-held tester to the DLC3 on the vehicle.

(2)

Turn the ignition switch ON.

(3)

Warm up the engine by running the engine speed at 2,500 rpm for approximately 90 seconds.

(4)

Select the item ”DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F CONTROL”.

(5)

Perform ”A/F CONTROL” with the engine in an idle condition (press the right or left button).

Result:

Heated oxygen sensor reacts in accordance with increase and decrease of injection volume

+25 %  rich output: More than 0.5 V,

-12.5 %  lean output: Less than 0.4 V

05-122

DIAGNOSTICS

- SFI SYSTEM (April, 2003)

NOTICE:

There is a delay of few seconds in the sensor 1 (front sensor) output, and there is about 20 seconds

delay at maximum in the sensor 2 (rear sensor).

Output voltage of heated oxygen

Mainly suspect

sensor (sensor 1: front sensor)

sensor (sensor 2: rear sensor)

trouble area

Injection volume

+25 %

-12.5 %



Case 1

Output voltage

More than 0.5 V

Less than 0.4V

Injection volume

+25 %

-12.5 %

Sensor 1: front sensor

Output voltage

(sensor 1, heater, sensor 1

Case 2

circuit)

More than 0.5 V

No reaction

Less than 0.4V

Injection volume

+25 %

-12.5 %

Sensor 2: rear sensor

-12.5 %

Output voltage

(sensor 2, heater, sensor 2

Case 3

circuit)

More than 0.5 V

No reaction

Less than 0.4V

Injection volume

+25 %

Extremely rich or lean actual

-12.5 %

air-fuel ratio

Case 4

Output voltage

(Injector, fuel pressure, gas

leakage in exhaust system,

No reaction

etc.)

The following of A/F CONTROL procedure enables the technician to check and graph the voltage outputs

of both the heated oxygen sensors.

For displaying the graph indication, enter ”ACTIVE TEST / A/F CONTROL / USER DATA”, then select ”O2S

B1S1 and O2S B1S2” by pressing ”YES” button and push ”ENTER” button before pressing ”F4” button.

HINT:

If different DTCs related to different systems that have terminal E2 as the ground terminal are output

simultaneously, terminal E2 may be open.

Read freeze frame data using the hand−held tester or the OBD II scan tool. Freeze frame data records

the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determin-

ing whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio

was lean or rich, etc. at the time of the malfunction.

A high heated oxygen sensor (sensor 1) voltage (0.5 V or more) could be caused by a rich air fuel mix-

ture. Check for conditions that would cause the engine to run rich.

A low heated oxygen sensor (sensor 1) voltage (0.4 V or less) could be caused by a lean air fuel mix-

ture. Check for conditions that would cause the engine to run lean.

05-123

DIAGNOSTICS

SFI SYSTEM (April, 2003)

CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0134)

(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.

(b) Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.

(c)

Select the item ”DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES”.

(d) Read the DTCs.

Result:

Display (DTC output)

Proceed to

P0134

P0134 and other DTCs

HINT:

If any other codes besides P0134 are output, perform the troubleshooting for those DTCs first.

GO TO RELEVANT DTC CHART

(See page 05-35)

READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL(OUTPUT

VOLTAGE OF HEATED OXYGEN SENSOR)

(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.

(b) Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.

(c)

Select the item ”DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / O2S B1S1”.

(d) Warm up the engine to the normal operating temperature above 75_C (169_F).

(e) Read the output voltage of the heated oxygen sensor when the engine speed is suddenly increased.

HINT:

Quickly accelerate the engine to 4,000 rpm 3 times by using the accelerator pedal.

Standard:

Heated oxygen sensor outputs a RICH signal (0.45 V or more) at least once.

OK Go to step 12

CHECK CONNECTION OF PCV HOSE

NG REPAIR OR REPLACE PCV HOSE

05-124

DIAGNOSTICS

- SFI SYSTEM (April, 2003)

INSPECT HEATED OXYGEN SENSOR(HEATER RESISTANCE)

Component Side:

(a) Disconnect the H5 heated oxygen sensor connector.

Heated Oxygen Sensor

(b) Measure the resistance between the terminals of the

heated oxygen sensor connector.

Bank 1,

Standard:

Sensor 1

Tester Connection

Specified Condition

HT (H5-1) - +B (H5-2)

5 to 10 W at 20 _C (68 _F)

HT (H5-1) - E1 (H5-4)

10 kW or higher

(c)

Reconnect the heated oxygen sensor connector.

Front View

A79112

NG REPLACE HEATED OXYGEN SENSOR

INSPECT EFI RELAY

(a) Remove the EFI relay from the engine room R/B.

(b) Check for continuity in the EFI relay.

Standard:

Tester Connection

Specified Condition

1 - 2

Continuity

No continuity

3 - 5

Continuity

(Apply battery voltage to terminals 1 and 2)

(c)

Install the EFI relay.

E34090

NG REPLACE EFI RELAY

05-125

DIAGNOSTICS

- SFI SYSTEM (April, 2003)

CHECK HARNESS AND CONNECTOR(HEATED OXYGEN SENSOR - ECM)

Wire Harness Side:

(a) Disconnect the H5 heated oxygen sensor connector.

Heated Oxygen Sensor Connector

(b) Disconnect the E4 ECM connector.

(c)

Check the resistance between the wire harness side con-

Bank 1 Sensor 1

nectors.

Standard (Check for open):

Tester Connection

Specified Condition

HT (H5-1) - HT1A (E4-4)

Below 1 W

OX (H5-3) - OX1A (E4-23)

Front View

A79114

Standard (Check for short):

Tester Connection

Specified Condition

HT (H5-1) or HT1A (E4-4) - Body ground

10 kW or higher

OX (H5-3) or- OX1A (E4-23) - Body ground

(d) Reconnect the ECM connector.

(e) Reconnect the heated oxygen sensor connector.

HT1A

OX1A

ECM Connector

A65745

Reference (Bank 1 Sensor 1 System Drawing):

ECM

EFI Relay

Heated Oxygen Sensor

From

EFI Fuse

Heater

HT1A

Battery

Sensor

OX1A

From

Duty

Terminal 6 of

Control

Ignition Switch

Ground Ground

A82244

NG REPAIR OR REPLACE HARNESS OR

CONNECTOR

CHECK WHETHER MISFIRE IS OCCURRED OR NOT BY MONITORING DTC AND

DATA LIST

NG PERFORM TROUBLESHOOTING FOR MISFIRE

(See page 05-149)

05-126

DIAGNOSTICS

- SFI SYSTEM (April, 2003)

CHECK AIR INDUCTION SYSTEM

(a) Check the air induction system for vacuum leaks.

NG REPAIR OR REPLACE AIR INDUCTION SYSTEM

CHECK FUEL PRESSURE (See page 11-5)

(a) Check the fuel pressure (high or low pressure).

NG REPAIR OR REPLACE FUEL SYSTEM

INSPECT FUEL INJECTOR ASSY(INJECTION AND VOLUME) (See page 11-7)

NG REPLACE FUEL INJECTOR ASSY

CHECK FOR EXHAUST GAS LEAKS

NG REPAIR OR REPLACE EXHAUST GAS

LEAKAGE POINT

REPLACE HEATED OXYGEN SENSOR

PERFORM CONFIRMATION DRIVING PATTERN (See page 05-101)

HINT:

Clear all DTCs prior to performing the confirmation pattern.

READ OUTPUT DTC(DTC P0134 IS OUTPUT AGAIN)

(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.

(b) Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.

(c)

Select the item ”DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES”.

(d) Read the DTCs.

Result:

Display (DTC output)

Proceed to

No output

P0134

REPLACE ECM (See page 10-11)

05-127

DIAGNOSTICS

SFI SYSTEM (April, 2003)

CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST

NO CHECK FOR INTERMITTENT PROBLEMS

(See page 05-41)

YES

DTC IS CAUSED BY RUNNING OUT OF FUEL

05-128

DIAGNOSTICS

- SFI SYSTEM (April, 2003)

05DIL-01

DTC

P0136

OXYGEN SENSOR CIRCUIT MALFUNCTION

(BANK 1 SENSOR 2)

CIRCUIT DESCRIPTION

Refer to DTC P0130 on page 05-101.

DTC No

DTC Detection Condition

Trouble Area

The following condition (a) or (b) continues for 300 seconds or

F Open or short in heated oxygen sensor (bank 1 sensor 2)

circuit

P0136

(a) During driving with the engine warmed up, heated oxygen

F Heated oxygen sensor (bank 1 sensor 2)

sensor output does not change

F Heated oxygen sensor heater (bank 1 sensor 2)

(b) Heated oxygen sensor output is very low most of the time.

F EFI relay

HINT:

Sensor 2 refers to the sensor farthest away from the engine assembly.

MONITOR DESCRIPTION

The heated oxygen sensor generates waveform of a voltage between 0 V and 1 V in response to the oxygen

concentration in the exhaust gases. When the output voltage of the heated oxygen sensor is 0.5 V or more,

the ECM judges that the air-fuel ratio is RICH. When it is 0.40 V or less, the ECM judges that the air-fuel

ratio is LEAN.

If the rear heated oxygen sensor output dose not change between RICH and LEAN during ”Stop and GO”

driving, the ECM interprets this as a malfunction in the rear heated oxygen sensor and sets a DTC. Also,

if the sensor output remains at less than 0.05 V for more than 156 seconds when ECM monitored the heated

oxygen sensor for 260 seconds while the air fuel feedback is being performed (the detecting condition differs

depending on the type of vehicles), the ECM will interpret this as a fault. In either case, the ECM will turn

on the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs

P0136

Heated oxygen sensor output voltage (bank 1)

Main sensors

Rear heated oxygen sensor

Required sensors/components

Related sensors

Mass air flow sensor, vehicle speed sensor

Frequency of operation

Once per drive cycles

Duration

300 seconds

MIL operation

2 driving cycles

Sequence of operation

None

05-129

DIAGNOSTICS

SFI SYSTEM (April, 2003)

TYPICAL ENABLING CONDITIONS

Specification

Item

Minimum

Maximum

The monitor will run whenever the follow-

See ”List of Disable a Monitor” (On page 05-25)

ing DTCs are not present

Case 1:

Vehicle speed

2 mph (3 km/h)

Idle

OFF

Fuel cut

OFF

Time after fuel cut ON to OFF

5 seconds

0.3 g/rev (AT)

Intake air amount per revolution

0.22 g/rev (MT)

Case 2 (Output voltage):

290 seconds (Engine coolant temperature is less

Time while the following conditions A and

than 75_C (167_F))

B are met

240 seconds (Engine coolant temperature is

75_C (167_F) or more)

A. Fuel system status

Closed-loop

B. Idle

OFF

Deceleration count (The number of times

30 times

accelerating and decelerating)

Deceleration is counted up when vehicle

3 mph (5 km/h) / 2 seconds

decelerates

TYPICAL MALFUNCTION THRESHOLDS

Detection Criteria

Threshold

Case 1:

Following conditions are met:

1, 2 and 3

260 seconds or more (AT)

1. Cumulative heated oxygen sensor monitor time

190 seconds or more (MT)

2. Time while heated oxygen sensor voltage is less than

156 seconds or more (AT)

0.05V

114 seconds or more (MT)

3. Maximum heated oxygen sensor rich time (0.45V or

Less than 20 seconds

more)

Case 2:

Number of heated oxygen sensor voltage ”switching”

0 times or less

”Switching” is counted when the sensor signal crosses the minimum or maximum voltage

Minimum voltage

0.4 V or less

Maximum voltage

0.5 V or more

COMPONENT OPERATING RANGE

Parameter

Standard Value

Heated oxygen sensor voltage

0 to 1 V

MONITOR RESULT (MODE 06 DATA)

Conversion fac-

Test ID

Comp ID

Description of test data

Description of test limit

Unit

tor

Not supported by mode $06, but

$03

by mode $05

Refer to page 05-27 for detailed information on Checking Monitor Status.

WIRING DIAGRAM

Refer to DTC P0130 on page 05-101.

05-130

DIAGNOSTICS

- SFI SYSTEM (April, 2003)

CONFIRMATION DRIVING PATTERN

(f)

Once

Twice

12 times

40 seconds

Vehicle speed

40 seconds

or more

25 mph

(40 km/h)

(d)

Idling (c)

(e)

Ignition OFF

60 seconds

10 seconds

or more

(a), (b)

A58686

(a) Connect the hand-held tester to the DLC3.

(b) Switch the hand-held tester from the normal mode to the check mode (See page 05-11).

(c)

Start the engine and let it idle for 60 seconds or more.

(d) Drive the vehicle at 25 mph (40 km/h) or more for 40 seconds or more.

(e) Let the engine idle for 10 seconds or more.

(f)

Perform steps (d) and (e) 12 times.

HINT:

If a malfunction exists, the MIL will be illuminated on the multi information display during step (f).

NOTICE:

If the conditions in this test are not strictly followed, a malfunction detection will not occur. If you do

not have a hand-held tester, turn the ignition switch OFF after performing steps from (c) to (f), then

perform steps from (c) to (f) again.

05-131

DIAGNOSTICS

- SFI SYSTEM (April, 2003)

INSPECTION PROCEDURE

HINT:

Hand-held tester only:

Narrowing down the trouble area is possible by performing ”A/F CONTROL” ACTIVE TEST (heated oxygen

sensor or other trouble areas can be distinguished).

(a) Perform ACTIVE TEST using hand-held tester (A/F CONTROL).

HINT:

”A/F CONTROL” is the ACTIVE TEST which changes the injection volume to -12.5 % or +25 %.

(1)

Connect the hand-held tester to the DLC3 on the vehicle.

(2)

Turn the ignition switch ON.

(3)

Warm up the engine by running the engine speed at 2,500 rpm for approximately 90 seconds.

(4)

Select the item ”DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F CONTROL”.

(5)

Perform ”A/F CONTROL” with the engine in an idle condition (press the right or left button).

Result:

Heated oxygen sensor reacts in accordance with increase and decrease of injection volume

+25 %  rich output: More than 0.5 V,

-12.5 %  lean output: Less than 0.4 V

NOTICE:

There is a delay of few seconds in the sensor 1 (front sensor) output, and there is about 20 seconds

delay at maximum in the sensor 2 (rear sensor).

Output voltage of heated oxygen

Mainly suspect

sensor (sensor 1: front sensor)

sensor (sensor 2: rear sensor)

trouble area

Injection volume

+25 %

-12.5 %



Case 1

Output voltage

More than 0.5 V

Less than 0.4V

Injection volume

+25 %

-12.5 %

Sensor 1: front sensor

Output voltage

(sensor 1, heater, sensor 1

Case 2

circuit)

More than 0.5 V

No reaction

Less than 0.4V

Injection volume

+25 %

-12.5 %

Sensor 2: rear sensor

-12.5 %

Output voltage

(sensor 2, heater, sensor 2

Case 3

circuit)

More than 0.5 V

No reaction

Less than 0.4V

Injection volume

+25 %

Extremely rich or lean actual

-12.5 %

air-fuel ratio

Case 4

Output voltage

(Injector, fuel pressure, gas

leakage in exhaust system,

No reaction

etc.)

05-132

DIAGNOSTICS

- SFI SYSTEM (April, 2003)

The following of A/F CONTROL procedure enables the technician to check and graph the voltage outputs

of both the heated oxygen sensors.

For displaying the graph indication, enter ”ACTIVE TEST / A/F CONTROL / USER DATA”, then select ”O2S

B1S1 and O2S B1S2” by pressing ”YES” button and push ”ENTER” button before pressing ”F4” button.

HINT:

If different DTCs related to different systems that have terminal E2 as the ground terminal are output

simultaneously, terminal E2 may be open.

Read freeze frame data using the hand−held tester or the OBD II scan tool. Freeze frame data records

the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determin-

ing whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio

was lean or rich, etc. at the time of the malfunction.

CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0136)

(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.

(b) Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.

(c)

Select the item ”DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES”.

(d) Read the DTCs.

Result:

Display (DTC output)

Proceed to

P0136

P0136 and other DTCs

HINT:

If any other codes besides P0136 are output, perform the troubleshooting for those DTCs first.

GO TO RELEVANT DTC CHART

(See page 05-35)

READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL(OUTPUT

VOLTAGE OF HEATED OXYGEN SENSOR)

(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.

(b) Start the engine and push the hand-held tester or the OBD II scan tool main switch ON.

(c)

Select the item ”DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / O2S B1S2”.

(d) After warming up the engine, run the engine at 2,500 rpm for 3 minutes.

(e) Read the output voltage of the heated oxygen sensor (sensor 2) when the engine rpm is suddenly in-

creased.

HINT:

Quickly accelerate the engine to 4,000 rpm 3 times by using the accelerator pedal.

Standard:

The output voltage of heated oxygen sensor (sensor 2): Alternates from 0.4 V or less to 0.5 V

or more.

OK Go to step 6

05-133

DIAGNOSTICS

- SFI SYSTEM (April, 2003)

INSPECT HEATED OXYGEN SENSOR(HEATER RESISTANCE)

(a) Disconnect the H8 heated oxygen sensor connector.

Component Side:

(b) Measure the resistance between the terminals of the

Heated Oxygen Sensor

heated oxygen sensor connector.

Bank 1,

Standard:

Sensor 2

Tester Connection

Specified Condition

HT (H8-2) - +B (H8-1)

5 to 10 W at 20 _C (68 _F)

HT (H8-2) - E1 (H8-3)

10 kW or higher

(c)

Reconnect the heated oxygen sensor connector.

Front View

A84555

NG REPLACE HEATED OXYGEN SENSOR

INSPECT EFI RELAY

(a) Remove the EFI relay from the engine room R/B.

(b) Check for continuity in the EFI relay.

Standard:

Tester Connection

Specified Condition

1 - 2

Continuity

No continuity

3 - 5

Continuity

(Apply battery voltage to terminals 1 and 2)

(c)

ReInstall the EFI relay.

E34090

NG REPLACE EFI RELAY

05-134

DIAGNOSTICS

- SFI SYSTEM (April, 2003)

CHECK HARNESS AND CONNECTOR(HEATED OXYGEN SENSOR - ECM)

Wire Harness Side:

(a) Disconnect the H8 heated oxygen sensor connector.

Heated Oxygen Sensor Connector

(b) Disconnect the E4 and E5 ECM connector.

(c)

Check the resistance between the wire harness side con-

Bank 1 Sensor 2

nectors.

Standard (Check for open):

Tester Connection

Specified Condition

HT (H8-2) - HT1B (E5-4)

Below 1 W

OX (H8-4) - OX1B (E4-21)

Front View

A84556

Standard (Check for short):

Tester Connection

Specified Condition

HT (H8-2) or HT1B (E5-4) - Body ground

10 kW or higher

OX (H8-4) or OX1B (E4-21) - Body ground

(d) Reconnect the ECM connector.

(e) Reconnect the heated oxygen sensor connector.

OX1B

HT1B

ECM Connector

A65747

Reference (Bank 1 Sensor 2 System Drawing):

ECM

EFI Relay

Heated Oxygen Sensor

From

EFI Fuse

Heater

HT1B

Battery

Sensor

OX1B

From

Duty

Terminal 6 of

Control

Ignition Switch

Ground Ground

A82244

NG REPAIR OR REPLACE HARNESS OR

CONNECTOR

REPLACE HEATED OXYGEN SENSOR

05-135

DIAGNOSTICS

SFI SYSTEM (April, 2003)

PERFORM CONFIRMATION DRIVING PATTERN

HINT:

Clear all DTCs prior to performing the confirmation driving pattern.

READ OUTPUT DTC(DTC P0136 IS OUTPUT AGAIN)

(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.

(b) Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.

(c)

Select the item ”DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES”.

(d) Read the DTCs.

Result:

Display (DTC output)

Proceed to

P0136

No output

CHECK FOR INTERMITTENT PROBLEMS

(See page 05-41)

REPLACE HEATED OXYGEN SENSOR

Content .. 58 59 60 61 ..