Question about 1997 Nissan Pickup

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I replaced o2censor in bank 1 it reads ok.after 2 drive cycles 5 monitors read ok and 3 read incomplete.thay will not complete.

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  • matthew_nobl Dec 31, 2010

    I replaced a falty oxygen sensor in bank 1 and reset the computer buy disconecting the battary for 10 minutes.i pluged my scanner in.it reads oxygen sensor heater monitor is ok.but after 2 drive cycles the monitors read 6 ok and 2 incomplete.those two are egr system mon. and evaporative system mon..thay will not complete after about 200miles.i need to pass nys emissions test.help

  • matthew_nobl Dec 31, 2010

    thank you kiltylake. that was vary helpfull and good advise.

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Matthew it will eventually reset but there is something that makes it unable to complete.
The evap system needs to have at least a quarter tank of fuel and less than full in order to run.
And I suspect the EGR will also run when the evap does.
Some peoples driving habits will sometimes take weeks to clear.
Need to do all types of driving ,stop and go, idle and highway.
Hopefully this advise will help you along with your upcoming test.

Thank you for usingFixYa.............KL

Posted on Dec 31, 2010

  • FUBAR Dec 31, 2010

    Thank you for the rating and the comment, it is appreciated.

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You have to reset the computer,first dissconnect the hot side from the battarys leave it off for 5 minute then connect it back up that should sove the promblem.

Posted on Dec 30, 2010

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Firing order coil pack 2000 ford explore 5-0


Firing Order is 1 3 7 2 6 5 4 8

JF: Integrated Ignition Coil On Plug Coil 1 Through 10 Failure

2000 PCED On Board Diagnostics II


SECTION 5: Pinpoint Tests




Procedure revision date: 01/31/2001










JF: Integrated Ignition Coil On Plug Coil 1 Through 10 Failure


? JF: Introduction




JF1 DETERMINE WHICH COIL IS NOT FIRING

    Note: Electronic ignition engine timing is entirely controlled by the PCM. Electronic ignition timing is NOT adjustable. Do not attempt to check base timing. You will receive false readings.

  • Determine which coil is not firing using information from Pinpoint Test JB or DTC and the table at the beginning of this pinpoint test.


  • Record cylinder, coil and PCM pin number from the table.


Have the cylinder number, coil driver and PCM pin number been recorded?







Yes


No






GO to JF2.


To obtain required information, GO to JF1 and REPEAT.




JF2 DTC P0351, P0356, P0357: CRANKSHAFT POSITION SENSOR FAILURE
Are any of the above listed DTCs present?







Yes


No






GO to JF3.


GO to JF4.




JF3 CHECK RESISTANCE OF CRANKSHAFT POSITION SENSOR


  • Measure resistance of crankshaft position sensor.


Is resistance between 290 and 390 ohms (for LS8 between 900 and 1300 ohms)?







Yes


No






GO to JF4.


REPLACE crankshaft position sensor. COMPLETE Misfire Monitor Repair Verification Drive Cycle (REFER to Section 2, Drive Cycles).




JF4 CHECK FUNCTIONALITY OF SUSPECT COIL DRIVER (CD) CIRCUIT


  • Disconnect suspect coil (determined from the table).


  • Connect incandescent test lamp between IGN START/RUN and suspect CD circuit (determined from the table) at the coil on plug harness connector.


  • Disable fuel pump by disconnecting inertia fuel shutoff switch.


  • Observe incandescent test lamp while cranking engine.


Is the test lamp blinking consistently?







Yes


No






KEY OFF. GO to JF5.


KEY OFF. GO to JF6.




JF5 CHECK FUNCTIONALITY OF SUSPECT COIL


  • Remove suspect coil (determined from the table) from spark plug.


  • Connect an air gap spark tester 303-D037 (D81P-6666-A) or equivalent to a suspect coil.


  • Reconnect suspect coil harness connector.


  • Observe spark tester while cranking engine.


Is the spark present?







Yes


No






KEY OFF. INSPECT spark plug, REPLACE if necessary. GO to Z1.


KEY OFF. REPLACE coil. INSPECT spark plug, REPLACE if necessary. COMPLETE Misfire Monitor Repair Verification Drive Cycle (REFER to Section 2, Drive Cycles).




JF6 CHECK IGN START/RUN VOLTAGE TO SUSPECT COIL


  • Key on, engine off.


  • Measure voltage between IGN START/RUN circuit at the coil on plug harness connector and ground.


Is voltage greater than 10.0 volts?







Yes


No






KEY OFF. GO toJF7.


KEY OFF. LS6 and LS8: GO to B5.

All others: IGN START/RUN circuit fault. CHECK condition of related fuses/fuse links. If OK, REPAIR open circuit. If fuse/fuse link is damaged, CHECK IGN START/RUN circuit for short to ground. REPAIR as necessary. COMPLETE Misfire Monitor Repair Verification Drive Cycle (REFER to Section 2, Drive Cycles).




JF7 CHECK SUSPECT CD CIRCUIT FOR OPEN IN HARNESS


  • Disconnect PCM.


  • Measure resistance of suspect CD circuit between PCM harness connector pin (determined from the table) and coil on plug harness connector.


Is resistance less than 5 ohms?







Yes


No






GO to JF8.


REPAIR open circuit. COMPLETE Misfire Monitor Repair Verification Drive Cycle (REFER to Section 2, Drive Cycles).




JF8 CHECK SUSPECT CD CIRCUIT FOR SHORT TO VPWR IN HARNESS


  • Key on, engine off.


  • Measure voltage between suspect CD circuit at the PCM harness connector (determined from the table) and ground.


Is voltage less than 1.0 volt?







Yes


No






KEY OFF. GO to JF9.


KEY OFF. REPAIR short circuit. COMPLETE Misfire Monitor Repair Verification Drive Cycle (REFER to Section 2, Drive Cycles).




JF9 CHECK SUSPECT CD CIRCUIT FOR SHORT TO GROUND IN HARNESS


  • Disconnect scan tool.


  • Measure resistance between suspect CD circuit at the PCM harness connector (determined from the table) and ground.


Is resistance greater than 10,000 ohms?







Yes


No






GO toJF10.


REPAIR short circuit. If symptom or DTC is still present, GO to JF11 to check for damaged coil, otherwise COMPLETE Misfire Monitor Repair Verification Drive Cycle (REFER to Section 2, Drive Cycles).




JF10 PERFORM INTERMITTENT TEST ON SUSPECT CD CIRCUIT HARNESS


  • Connect digital multimeter between suspect CD circuit at the PCM harness connector (determined from the table) and CD circuit at coil on plug harness connector.


  • Wiggle and bend CD harness from PCM harness connector to coil on plug harness connector.


Did resistance fluctuate during wiggle test?







Yes


No






REPAIR intermittent fault in harness. COMPLETE Misfire Monitor Repair Verification Drive Cycle (REFER to Section 2, Drive Cycles).


REPLACE PCM. (REFER to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM)). If symptom or DTC is still present, GO to JF11 to check for damaged coil, otherwise COMPLETE Misfire Monitor Repair Verification Drive Cycle (REFER to Section 2, Drive Cycles).




JF11 CHECK SUSPECT COIL FOR DAMAGE


  • Remove suspect coil (determined from the table) from spark plug.


  • Connect an air gap spark tester 303-D037 (D81P-6666-A) or equivalent to a suspect coil.


  • Disable fuel pump by disconnecting inertia fuel shutoff switch.


  • Observe spark tester while cranking engine.


Is the spark present?







Yes


No






KEY OFF. INSPECT spark plug, REPLACE if necessary. GO to Z1.


KEY OFF. REPLACE coil. INSPECT spark plug, REPLACE if necessary. COMPLETE Misfire Monitor Repair Verification Drive Cycle (REFER to Section 2, Drive Cycles).

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1 Answer

What is the drive cycle computer rest for 2010 corolla


drive cycle, why not just forget that. I do. (mostly)
why>?
what do I do, i reset the PCM with my $10 scan tool
when dont, all monitors are now reset, ALL !

drive cycles to finish off all monitors? (a goal for say smog testing)

that is easy most clear fast. running fast.
but not EVAP, can take up to 30min but
if fuel tank is fuel, it never completes EVAP until 1/4 lower, 3/4 full and less.
EGR tests? can be easy if you drive fast, and then coast to a stop
both tests cleared. (sans complete)
monitors are (no appliclable, not ready or complete)
to do smog, all must be complete and no DTCs. (rare exceptions)

the drive cycle means number of times it takes to set a code for one test monitor or clear one.
some newer cars take 2 drives to set them.
and is important, the FSM covers this.
why not post symptoms or reasons for asking.

just curious?, then read the ASE book on OBD2 technology.

alldata.com RTM.

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P0068 map/maf throttle position correlation


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This is flagged after DTCs have been cleared, all engine management OBD diagnostic monitor drive cycles HAVE BEEN COMPLETED.

P1646 - Linear O2 Sensor Control Chip (Bank 1)
Its listed as either a faulty heated HO2 sensor ie lambda sensor (upstream bank 1) or a short (presuming the ECM is OK as no other codes)
Did you replace the right one... bank 1 is at the back of the V6, bank 2 is at the front so its the back one.

Hope this helps (remember to rate tis answer).

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2 Answers

P0031, ho25circuit low, bank 1 sensor 1. sft b1 -3.91, ltft b1 .78, stft b2 -3.91, ltft b2 3.91. R&R ox sensor or what


Hello,
P0031 - Bank 1 Heated Oxygen Sensor No. 1 Heater Circuit - Low Voltage. That is what this code means.
DTC P0031 is set when Bank 1 HO2S No.1 heater current is less then .09 amps, or potential difference between heater positive and negative terminals is more then 13.99 volts while HO2S heater is on. MIL (The engine light) is illuminated when Engine Control Module (ECM) detects malfunction during 2 consecutive drive cycles.
Possible Causes are: - Bank 1 HO2S No. 1 heater circuit malfunction - Bank 1 HO2S No. 1 heater malfunction - ECM malfunction - HO2S heater relay

DTC Confirmation Test (Advanced/Intermediate Users): Ensure intake air tempature is 18f (-8c) or more, engine coolant tempature is 18-230f (-8-110c) and vehicle is at an altitude of 8000 feet or below, and barometric pressure is 75 kPa or more. Turn ignition off, connect scan tool and turn ignotion on. Using scan tool, clear DTCs. Start engine and run at idle speed for 5 minutes. Using scan tool check for current or pending DTC P0031.

Diagnosis & Repair Procedure (Advanced/Intermediate Users): 1. If engine system check has been performed, go to the next step. If engine system check has not been performed, do the system check.
2. Turn ignition off. Disconnect Bank 1 HO2S No. 1 4-pin harness connector. Bank 1 HO2S No. 1 is located in the left exhause pipe before catalytic convertor. Measure resistance between Bank 1 HO2S No. 1 pigtail connector terminal No. 3 (Green wire) and No. 4 (Blue wire). Resistance should be 5.0-6.4 ohms at 68f (20c). If resistance is as specified, go to next step. If resistence is not as specified, replace HO2S. After repair repeat DTC Confirmation Test (Above).
3. Disconnect HO2S heater relay. HO2S heater relay is located on the left fender well. Turn ignition On. Measure voltage between ground and HO2S heater relay socket cavity No. 3 (Black/White wire). Also measure voltage between ground and HO2S heater relay socket cavity No. 1 (Blue/White wire). If voltage readings at both measurements is 10-14 voltes, go to step 5. If voltage readings are not as specified go to next step.
4. Check for blown HO2S (15-amp) or IG COIL (20-amp) fuses. Fufses are located in the underhood fuse and relay boxc. If fuses are okay, check for open or short it to ground in Black/White wire between IG COIL fuse HO2S heater relay. If problem is found repair as necessary. After repair repeat DTC Confirmation Test (Above).
5. Turn Ignition off. Install HO2S heater relay. Dicsonnect ECM 30-pin harness connector C51-2. ECM is located under instrument panel, under glove box. Measure voltage between ground and ECM harness connector C51-2 terminal No. 4 (Green wire). If voltage reading is 10-14 volts, subsitute a known-good ECM, and repeat DTC Confirmation Test (Above). If DTC does not reset, testing is complete. If voltage readings are not specified, go to next step.
6. Check for short to ground in Green wire between Bank 1 HO2S No. 1 and ECM. If no problem with wiring is found, replace HO2S heater relay. If problem persists after repairs, subsitute a known-good ECM and repeat DTC Confirmation Test (Above).

I hope this helps and is what your looking for. Best of luck.

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1 Answer

Emission testing


OBDII.com has the required drive cycle for all vehicles necessary to allow monitors to be completed. I assume tha when you say 1 of 5 you mean only one of your monitors is complete

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