Toyota Noah Wiring Manual

05–388 DIAGNOSTICS – SFI SYSTEM (1AZ– (1AZ–FSE) FSE)

05CKC–01

DTC

P0136

OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 1 SENSOR 2)

DTC

P0156

OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 2 SENSOR 2)

CIRCUIT DESCRIPTION Refer to DTC P0130 on page 05–363. 05–363. DTC No

P0136 P0156

DTC Detection Condition If the following two conditions are satisfied at a time (2 trip detection logic): (a) The ECM records cycles which which the vehicle driving and stops 8 times or more. (b) There was no change in the rich and lean lean outputs from heated oxygen sensor (sensor 2) for the 360 seconds un-

Trouble Area

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  

Open or short in heated oxygen sensor (bank 1, 2 sensor 2) circuit Heated oxygen sensor (bank 1, 2 sensor 2) Heated oxygen sensor heater (bank 1, 2 sensor 2) EFI relay

der air fuel ratio feedback control. (Throttle was not closed)

HINT: 





Bank 1 refers to the No. 1 and No. 4 cylinders. Bank 2 refers to the No. 2 and No. 3 cylinders. Sensor 2 refers to the sensor farthest away from the engine assembly.

WIRING DIAGRAM Refer to DTC P0130 on page 05–363. 05–363.

AVENSIS REPAIR MANUAL (RM1018 (RM1018E) E)


CONFIRMATION DRIVING PATTERN

Vehicle speed

Once 40 sec. or more

Twice 40 sec. or more

(f) 12 times 40 sec. or more

(d)

(d)

(d)

40 km/h (25 mph) Idling (c)

(e)

(e)

(e)

IG SW OFF

(a), (b)

60 sec. or more

10 sec.

10 sec.

10 sec.

A58686

(a) Co (a) Conn nnec ectt the han hand– d–he held ld tes teste terr to the the DLC DLC3. 3. (b) Swit Switch ch the the hand–h hand–held eld teste testerr from from the norm normal al mode mode to the the check check (test) (test) mode (See page 05–294). 05–294). (c) Sta Start rt the the engine engine and let let the the engine engine idl idle e for 60 60 second seconds s or more. more. (d) Driv Drive e the the vehicl vehicle e at 40 km/h km/h (25 mph) or more more for 40 40 second seconds s or more more.. (e) Le Lett the the engi engine ne idl idle e for for 10 sec secon onds ds or mor more. e. (f)) (f Perf Pe rfor orm m ste steps ps (d (d)) and and (e (e)) 12 12 tim times es.. HINT: If a malfunction exists, the CHK ENG will be illuminated on the multi information display during step (f). NOTICE: If the conditions in i n this test are not strictly followed, detection of a malfunction 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.

INSPECTION PROCEDURE HINT: Hand–held tester only: Narrowing down the trouble area is possible by performing the ”A/F CONTROL” ACTIVE TEST (heated oxygen sensor or other trouble areas can be distinguished). (a) Pe Perfo rform rm ACTIV ACTIVE E TEST usin using g the hand– hand–hel held d tester tester (A/F (A/F CONTRO CONTROL). L). HINT: ”A/F CONTROL” is an ACTIVE TEST which changes the injection volume –12.5 % or +25 %. (1) Co Conne nnect ct the the hand– hand–hel held d teste testerr to the the DLC3 DLC3 on on the the vehicl vehicle. e. (2)) Tur (2 urn n the the ig igni niti tion on sw swit itch ch ON ON.. (3) Warm up up the engin engine e by runni running ng the the engine engine at at 2,500 2,500 rpm for for approx approximate imately ly 90 sec. (4) Sel Select ect the the item item ”DIAG ”DIAGNOS NOSIS IS / OBD/M OBD/MOBD OBD / ACTI ACTIVE VE TEST TEST / A/F A/F CONTRO CONTROL”. L”. (5) Perf Perform orm ”A/F ”A/F CONTROL” CONTROL” with the the engine engine in in an idle idle conditio condition n (press (press the right right or or left button button). ). Result: Heated oxygen sensor reacts in accordance with increase and decrease of injection volume: +25 % rich output: More than 0.55 V –12.5 % lean output: Less than 0.4 V 

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NOTICE: There is a few seconds delay in the sensor 1 (front sensor) output. And there is about 20 seconds delay in the sensor 2 (rear sensor). Output voltage of heated oxygen sensor (sensor 1: front sensor) Injection volume

Output voltage of heated oxygen sensor (sensor 2: rear sensor) Injection volume

+25 %

+25 %

–12.5 %

–12.5 %

Case 1 Output voltage More than 0.55 V Less than 0.4V

Output voltage OK

Injection volume

More than 0.55 V Less than 0.4V

+25 %

–12.5 %

–12.5 %

Case 2 Output voltage NG

More than 0.55 V Less than 0.4V

Sensor 1: front sensor (sensor 1, heater, sensor 1 circuit) OK

Injection volume

+25 %

+25 %

–12.5 %

–12.5 %

Case 3 Output voltage

Sensor 2: rear sensor (sensor 2, heater, sensor 2 circuit)

Output voltage

More than 0.55 V

OK

Injection volume

No reaction

NG

Injection volume

+25 %

+25 %

–12.5 %

–12.5 %

Case 4 Output voltage No reaction

OK

Output voltage

Injection volume

Less than 0.4V



Injection volume

+25 %

No reaction

Mainly suspect trouble area

Output voltage NG

No reaction

NG

Extremely rich or lean actual air–fuel ratio (Injector, fuel pressure, gas leakage in exhaust system, etc.)

The following 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”, DATA”, then select ”O2S B1S1 and O2S B1S2” or ”O2S B2S1 and O2S B2S2” 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, simultaneou sly, terminal E2 may be open. Read freeze frame data using the hand–held tester. tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshoo troubleshooting, ting, it is useful for determining 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. 

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1 (a)

CHEC CH ECK K OTHE OTHER R DTC DTC OUTP OUTPUT UT(IN (IN AD ADDI DITI TION ON TO TO DTC DTC P013 P0136 6 AND/ AND/OR OR P01 P0156 56)) Read the Read the DTC usi using ng the han hand–h d–held eld tes tester ter.. Result: Display (DTC output)

Proceed to

Only ”P0136 and/or P0156” are output

A

”P0136 or P0156” and other DTCs are output

B

HINT: If any other codes besides ”P0136 and/or P0156” are output, perform the troubleshooting for those DTCs first. B

GO TO RELEVANT DTC RELEVANT DTC CHART (See page 05–309) 05–309)

A

2 (a) (b)

READ VALU READ VALUE E OF HAND HAND–HE –HELD LD TEST TESTER( ER(OUT OUTPUT PUT VOL VOLT TAGE OF HEA HEATED TED OXY OXYGEN GEN SENSOR) After warmi warming ng up up the engi engine, ne, run run the the engine engine at 2,500 2,500 rpm for for 3 minu minutes. tes. Read Rea d the output output voltage voltage of the heated heated oxyg oxygen en sensor sensor (senso (sensorr 2) when when the engi engine ne rpm rpm is sudden suddenly ly increased.

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

NG

3

INSP IN SPEC ECT T HEA HEATE TED D OXYG OXYGEN EN SEN SENSO SOR( R(HE HEA ATE TER R RESI RESIST STAN ANCE CE)) (a)

Component Side +B

H8

B1S2

H10 B2S2

HT









(b)

Disconne Disco nnect ct the H8 H8 or H10 H10 heat heated ed oxyg oxygen en sens sensor or conn connecector. Measur Mea sure e the res resist istanc ance e betwe between en the ter termin minals als of the the heated oxygen sensor connector. Standard (Bank 1, 2 Sensor 2):

E1

Terminal No.

Resistance

1 (HT) – 2 (+B)

11 to 16  at 20 C (68 F)

1 (HT) – 4 (E1)

No Continuity



A62378

NG OK


REPLACE HEATED OXYGEN SENSOR

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4

INSPECT EFI RELAY (a) (b)) (b

Remove Remov e the EFI rel relay ay from from the en engin gine e room room R/B R/B No. No. 4. 4. Insp In spec ectt the the EFI re rela lay y. Standard: Terminal No.

Specified condition

1–2

Continuity No Continuity

3–5

NG

B16200

Continuity (Apply battery voltage terminals 1 and 2)

REPLACE EFI RELAY

OK

5

CHEC CH ECK K HARN HARNES ESS S AND AND CO CONN NNEC ECTO TOR( R(HE HEA ATE TED D OXYG OXYGEN EN SEN SENSO SOR R – ECM ECM)) (a)

Wire Harness Side H8 B1S2

(b) (c)

H10 B2S2 HT OX

E1

Disconne Disco nnect ct the H8 H8 or H10 H10 heat heated ed oxyg oxygen en sens sensor or conn connecector. Disco Di sconne nnect ct the the E1 E11 1 and and E12 ECM con conne necto ctors. rs. Check Ch eck for for cont continu inuity ity bet betwee ween n the the wire wire harn harness ess sid side e conconnectors. Standard (Check for open): Symbols (Terminal No.)

Specified condition

OX (H8–3) – OX1B (E12–21)

Heated Oxygen Sensor Connector

HT (H8–1) – HT1B (E12–25)

A72895

E1 (H8–4) – O1B– (E11–26) OX (H10–3) – OX2B (E12–29)

Continuity

HT (H10–1) – HT2B (E12–33)

E12

E1 (H10–4) – O2B– (E11–31)

E11

Standard (Check for short):

OX1B

Symbols (Terminal No.)

O1B– HT1B HT2B OX2B

Specified condition

OX (H8–3) or OX1B (E12–21) – Body ground

O2B–

HT (H8–1) or HT1B (E12–25) – Body ground OX (H10–3) or OX2B (E12–29) – Body ground

No continuity

HT (H10–1) or HT2B (E12–33) – Body ground

ECM Connector A76824

HINT: 

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The OX1B and HT1B means the heated oxygen sensor bank 1 sensor 2. The OX2B and HT2B means the heated oxygen sensor bank 2 sensor 2.


Reference (Bank 1 Sensor 2 System Drawing) Heated Oxygen Sensor

EFI Relay From Battery

+B EFI Fuse

EFI No. 2 Fuse E1

Heater Sensor

ECM

HT

HT1B

OX

OX1B

Duty Control

O1B– MREL

A72920

NG

REPAIR OR CONNECTOR

REPLACE

HARNESS

OK REPLACE HEATED OXYGEN SENSOR

6

PERF PE RFOR ORM M CON CONFI FIRM RMA ATI TION ON DR DRIV IVIN ING G PA PATT TTER ERN N

HINT: Clear all DTCs prior to performing the confirmation driving pattern. GO

7 (a)

READ RE AD OU OUTP TPUT UT DT DTC( C(DT DTC C P013 P0136 6 AND AND/O /OR R P01 P0156 56 AR ARE E OUTP OUTPUT UT AG AGAI AIN) N) Read the DTC usi Read using ng the han hand–h d–held eld tes tester ter.. Result: Display (DTC output)

Proceed to

”P0136 and/or P0156” are not output again

A

”P0136 and/or P0156” are output again

B

B A CHECK FOR INTERMITTENT PROBLEMS


REPLACE HE HEATED OX OXYGEN SE SENSOR

OR

Toyota Noah Wiring Manual

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