Toyota Sequoia (2005). Manual - part 96

–

DIAGNOSTICS

ENGINE

DI–187

381

TYPICAL ENABLING CONDITIONS

It

Specification

Item

Minimum

Maximum

The monitor will run whenever these

DTCs are not present

See page 

DI–18

Battery voltage

8 V

–

Throttle position learning

Completed

VVT system

Normal operate by scan–tool

Engine RPM

400 to 5,700rpm

All of the following conditions are met:

Condition 1 and 2

1. Engine coolant temperature

–10



C (14



F)

–

2. Either of the following conditions is met:

Condition (a) or (b)

(a) Engine coolant temperature at engine
start

–7



C (19



F)

–

(b) Engine coolant temperature

20



C (68



F)

–

Fuel–cut

OFF

Emission–related–misfire:

First 1,000 revolutions after engine start,
or check mode

Crankshaft 1,000 revolutions

Except above

Crankshaft 1,000 revolutions x 4

Catalyst–damage–misfire (MIL blinks):

All of the following conditions 1, 2 and 3
are met

Crankshaft 200 revolutions

1. Driving cycle

1st

2. Check mode

OFF

3. Engine RPM

–

2,800 rpm

Except above

Crankshaft 200 revolutions x 3

TYPICAL MALFUNCTION THRESHOLDS

Detection Criteria

Threshold

Emission–related–misfire:

Misfire rate:

1.2 % or more

Catalyst–damage–misfire (MIL blinks):

Number of misfire per 200 revolutions

93 or more

(varies with intake air amount and RPM)

Multiple cylinders misfire

Detected

MONITOR RESULT

Refer to page 

DI–26

 for detailed information.

The test value and test limit information are described as shown in the following table. Check the monitor
result and test values after performing the monitor drive pattern (refer to ”Confirmation Monitor”).

MID (Monitor Identification Data) is assigned to each emissions–related component.

TID (Test Identification Data) is assigned to each test value.

Scaling is used to calculate the test value indicated on generic OBD ll scan tools.

DI–188

–

DIAGNOSTICS

ENGINE

382

Misfire monitor – All cylinders

MID

TID

Scaling

Description of Test Value

Minimum Test Limit

Maximum Test Limit

$A1

$0B

Multiply by 1

(time)

Exponential Weighted Moving Average

misfire counts for last 10 driving cycles

– total

0

65535

$A1

$0C

Multiply by 1

(time)

Misfire counts for last and current driv-

ing cycles – total

0

65535

Misfire monitor – Cylinder 1

MID

TID

Scaling

Description of Test Value

Minimum Test Limit

Maximum Test Limit

$A2

$0B

Multiply by 1

(time)

Exponential Weighted Moving Average

misfire counts for last 10 driving cycles

– total

0

65535

$A2

$0C

Multiply by 1

(time)

Misfire counts for last and current driv-

ing cycles – total

0

65535

Misfire monitor – Cylinder 2

MID

TID

Scaling

Description of Test Value

Minimum Test Limit

Maximum Test Limit

$A3

$0B

Multiply by 1

(time)

Exponential Weighted Moving Average

misfire counts for last 10 driving cycles

– total

0

65535

$A3

$0C

Multiply by 1

(time)

Misfire counts for last and current driv-

ing cycles – total

0

65535

Misfire monitor – Cylinder 3

MID

TID

Scaling

Description of Test Value

Minimum Test Limit

Maximum Test Limit

$A4

$0B

Multiply by 1

(time)

Exponential Weighted Moving Average

misfire counts for last 10 driving cycles

– total

0

65535

$A4

$0C

Multiply by 1

(time)

Misfire counts for last and current driv-

ing cycles – total

0

65535

Misfire monitor – Cylinder 4

MID

TID

Scaling

Description of Test Value

Minimum Test Limit

Maximum Test Limit

$A5

$0B

Multiply by 1

(time)

Exponential Weighted Moving Average

misfire counts for last 10 driving cycles

– total

0

65535

$A5

$0C

Multiply by 1

(time)

Misfire counts for last and current driv-

ing cycles – total

0

65535

Misfire monitor – Cylinder 5

MID

TID

Scaling

Description of Test Value

Minimum Test Limit

Maximum Test Limit

$A6

$0B

Multiply by 1

(time)

Exponential Weighted Moving Average

misfire counts for last 10 driving cycles

– total

0

65535

$A6

$0C

Multiply by 1

(time)

Misfire counts for last and current driv-

ing cycles – total

0

65535

Misfire monitor – Cylinder 6

MID

TID

Scaling

Description of Test Value

Minimum Test Limit

Maximum Test Limit

$A7

$0B

Multiply by 1

(time)

Exponential Weighted Moving Average

misfire counts for last 10 driving cycles

– total

0

65535

$A7

$0C

Multiply by 1

(time)

Misfire counts for last and current driv-

ing cycles – total

0

65535

–

DIAGNOSTICS

ENGINE

DI–189

383

Misfire monitor – Cylinder 7

MID

TID

Scaling

Description of Test Value

Minimum Test Limit

Maximum Test Limit

$A8

$0B

Multiply by 1

(time)

Exponential Weighted Moving Average

misfire counts for last 10 driving cycles

– total

0

65535

$A8

$0C

Multiply by 1

(time)

Misfire counts for last and current driv-

ing cycles – total

0

65535

Misfire monitor – Cylinder 8

MID

TID

Scaling

Description of Test Value

Minimum Test Limit

Maximum Test Limit

$A9

$0B

Multiply by 1

(time)

Exponential Weighted Moving Average

misfire counts for last 10 driving cycles

– total

0

65535

$A9

$0C

Multiply by 1

(time)

Misfire counts for last and current driv-

ing cycles – total

0

65535

A15466

A19380

Battery

I18
Ignition SW

1

#80

#60

#40

#20

#70

#50

ECM

#30

#10

6

2

I10 Injector No.2

I12 Injector No.4

I13 Injector No.5

I14 Injector No.6

I15 Injector No.7

I16 Injector No.8

7

1

2

1

2

1

2

1

2

1

2

2

2

2

3

2

5

7

4

I9 Injector No.1

1C

2D

1

B

F10
Fusible Link Block

IGN2

Engine Room J/B

5

4

B

2C

1

1C

1J

1D

2

3

W–R

6

AM2

Instrument Panel J/B

W–R

3

B–R

1

1

1

I11 Injector No.3

IG4

13

E8

E6

E6

E8

E6

E6

E6

E6

R–W

B–R

B–R

B–R

B–R

B–R

B–R

B–R

Y

R–B

L–R

W

L

G

R

B–R

B–R

B–R

5

IG2

AM2

B–R

B–R

B–R

B–R

B–R

DI–190

–

DIAGNOSTICS

ENGINE

384

WIRING DIAGRAM

Refer to DTC P0351 on page 

DI–221

 for the wiring diagram of the ignition system.

CONFIRMATION DRIVING PATTERN

(a)

Connect the hand–held tester to the DLC3.

(b)

Record DTC and the freeze frame data.

(c)

Use the hand–held tester to set the check mode (See page 

DI–44

).

(d)

Read the value on the misfire counter for each cylinder when idling. If the value is displayed on the
misfire counter, skip the following procedure of confirmation driving.

(e)

Drive the vehicle several times with the engine speed, load and surrounding range shown as ENGINE
SPD, CALC LOAD in the freeze frame data or MISFIRE RPM, MISFIRE LOAD in the DATA LIST.

If you have no hand–held tester, turn the ignition switch OFF after the symptom is simulated once. Then re-
peat the simulation process again.