Toyota Sequoia (2005). Manual - part 151

–

DIAGNOSTICS

ENGINE

DI–399

593

NG

Replace or replace harness or connector.

OK

13

Check air induction system (See page 

SF–1

).

CHECK:
Check the air induction system for vacuum leaks.

NG

Repair or replace air induction system.

OK

14

Check fuel pressure (See page 

SF–7

).

CHECK:
Check the fuel pressure (high or low pressure).

NG

Check and replace fuel pump, pressure regula-
tor, fuel pipe line and filter (See page 

SF–1

).

OK

15

Check injector injection (See page 

SF–29

).

NG

Replace injector.

OK

DI–400

–

DIAGNOSTICS

ENGINE

594

16

Replace air fuel ratio sensor.

NEXT

17

Perform confirmation driving pattern.

NEXT

18

Check whether DTC output recurs (DTC P2195, P2196, P2197 or P2198)

CHECK:
(a)

On the hand–held tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC
INFO / PENDING CODES.

(b)

Read DTCs.

RESULT:

Display (DTC Output)

Proceed To

P2195, P2196, P2197 or P2198

A

No output

B

B

Replace ECM (See page 

SF–80

) and perform

confirmation driving pattern.

A

19

Confirm whether vehicle has run out of fuel in past.

NO

Check for intermittent problems 
(See page 

DI–11

).

YES

DTC caused by running out of fuel.

–

DIAGNOSTICS

ENGINE

DI–401

595

20

Replace air fuel ratio sensor.

NEXT

21

Perform confirmation driving pattern.

NEXT

22

Check whether DTC output  recurs (DTC P2195, P2196, P2197 or P2198)

CHECK:
(a)

On the hand–held tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC
INFO / PENDING CODES.

(b)

Read DTCs.

RESULT:

Display (DTC Output)

Proceed To

P2195, P2196, P2197 or P2198 (A/F sensor pending DTCs)

A

No output

B

B

Replace ECM (See page 

SF–80

).

A

END

DI–402

–

DIAGNOSTICS

ENGINE

596

DTC

P2238

Oxygen Sensor Pumping Current Circuit
Low (For A/F Sensor)(Bank 1 Sensor1)

DTC

P2239

Oxygen Sensor Pumping Current Circuit
High (For A/F Sensor)(Bank 1 Sensor1)

DTC

P2241

Oxygen Sensor Pumping Current Circuit
Low (For A/F Sensor)(Bank 2 Sensor1)

DTC

P2242

Oxygen Sensor Pumping Current Circuit
High (For A/F Sensor)(Bank 2 Sensor1)

DTC

P2252

Oxygen Sensor Reference Ground Circuit
Low (For A/F Sensor)(Bank 1 Sensor1)

DTC

P2253

Oxygen Sensor Reference Ground Circuit
High (For A/F Sensor)(Bank 1 Sensor1)

DTC

P2255

Oxygen Sensor Reference Ground Circuit
Low (For A/F Sensor)(Bank 2 Sensor1)

DTC

P2256

Oxygen Sensor Reference Ground Circuit
High (For A/F Sensor)(Bank 2 Sensor1)

HINT:

Although the DTC titles say oxygen sensor, these DTCs relate to the Air–Fuel Ratio (A/F) sensor.

Sensor 1 refers to the sensor mounted in front of the Three–Way Catalytic Converter (TWC) and lo-
cated near the engine assembly.

DIDFU–01