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Toyota estima automatic transmission, diesel showing error code 42 (Vehicle Speed Sensor signal abnormal) on the DIAG machine. when driving its not changing all gear

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I would suggest changing the speed sensor. be careful toyotas most of the time have 2 one on trans and one in cluster. most always is one on trans,

Posted on Sep 30, 2010

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  • tpnya18 Sep 30, 2010

    thanx, would not have challenges locating the one on the transmission, but i seem not to get it by the other on the cluster. can you give mo dtails. i would appreciate

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A 2001 jimmy gmc my speedometer dose not work and my transmision will not shift i changed the sensor and it didnt fix the problem i changed the filter didnt help what else could cause this problem


What sensor did you change . VSS - vehicle speed sensor or output speed sensor .
The ideal what to find the problem would be to hook up a factory scan tool to see the VSS is put out a signal to the PCM/ECM , then see if the PCM /ECM is sending info to the instrument cluster ,. And knowing how these this work couldn't hurt either .

The IPC displays the vehicle speed based on the information from the PCM. The PCM converts the data from the vehicle speed sensor to a 4000 pulses/mile signal. The IPC uses the vehicle speed signal circuit from the PCM in order to calculate the vehicle speed. The speedometer defaults to 0 km/h (0 mph) if a malfunction in the vehicle speed signal circuit exists.

Have the vehicle checked for DTC"S - diagnostic trouble codes . No all code's turn on the check engine light .
DTC P0608
The PCM creates the vehicle speed output signal by pulsing the circuit to ground. The PCM pulses the circuit at the same rate as the vehicle speed signal input. The PCM monitors the voltage on the vehicle speed signal circuit. If the PCM determines the voltage is out of the normal operating range, a DTC sets.

Install a scan tool.
Raise the vehicle's drive wheels. Refer to Lifting and Jacking the Vehicle in General Information.
Start the engine.
Place the transmission into drive for an automatic transmission or third gear for a manual transmission.
With the scan tool, observe the Vehicle Speed Sensor parameter in the PCM data list.
Does the Vehicle Speed Sensor parameter match the speedometer display?

This is something best taken to a qualified repair shop . This could be a wiring issue , or the PCM or the instrument cluster .

Feb 14, 2017 | GMC Jimmy Cars & Trucks

2 Answers

My 1996 Toyota Avalon was making a knocking sound while driving on the freeway then stalled the engine will not come back on it just makes a clicking sound and the code reads p1705


That code relates to the transmission:
It's the sensor that sits directly on top of the transmission case.. Easy fix.
This sensor detects the rotation speed of the direct clutch drum.
By comparing the direct clutch speed signal with the vehicle
speed sensor signal, the ECM detects the shift timing of the
gears and appropriately controls the engine torque and hydraulic
pressure in response to various conditions, thus performing
smooth gear shifting.
DTC No. DTC Detecting Condition Trouble Area
P1705
The ECM detects conditions (a), (b), (c), (d), (e) and (f) continuity
for 4 secs. or more.
(2?trip detection logic)
(a) Vehicle speed : 32 km/h (20 mph) or more
(b) 3rd or 4th gear
(c) NC2 < 300 rpm
(d) Park/neutral position switch: OFF
(e) Solenoid valves and vehicle speed sensor are normal
(f) L position: OFF
 Open or short in direct clutch speed sensor circuit
 Direct clutch speed sensor
ECM
WIRING DIAGRAM
DI02P?03


according to this site:
Error code P1705

It's not why your car won't start.

Mar 09, 2016 | Toyota Cars & Trucks

1 Answer

2005 toyota camry speed sensor a


After doing a little research (I own a couple of pretty decent scanning tools and have become familiar with how they function)




Without knowing the actual code for the error there is no way of telling exactly what it's showing as the error. The Code is the PXXXX part of the error that the scanner will detect. There are a number of errors that will make the check engine light come on like that, some are as easy as making sure your gas cap is on tight. Others may show the same exact Gas cap code but for a malfunctioning Evap system. So the codes may be interpreted in many different ways, sometimes they will actually mislead you into buying parts that are not needed.
But fist you need to know the exact number of the code and not the name given to it. Then the circumstances when it happens (as you have already stated), Any effects that it might have on your car as far as how is runs or drives since the code has been showing. Also think back to anything that was touched prior to the codes showing, even filling up with gas, checking you oil etc. These will be places to look for a loose wire or possible connection with the time frame of when it all started.
This is the closest answer I could find:
Vehicle Speed Sensor "A" Circuit Low Input
What does this mean? OBD Code P0502refers to
The vehicle speed sensor outputs a 4 pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the ECM. The ECM determines the vehicle speed based on the frequency of these pulse signals.
Symptoms Possible sumptoms of OBD code P0502
- Engine Light ON (or Service Engine Soon Warning Light) - Speedometer may not work properly - Transmission shifting problem
Causes Possible causes of OBD code P0502
- Vehicle speed sensor harness or connectors is open or shorted - Vehicle speed sensor - Combination meter - Faulty ECM. The Error code is generally activated on detection of the following conditions: The signal sent by the vehicle speed sensor to ECM is too low.
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
*You can use this to try to figure out what may be part of the problem but remember that the codes don't always point to the actual problems. They just let you know that while performing a test that test either failed or could not be completed with a good result. There could be numerous other things that can interfere with a test.
Toyota P0502 OBD DLC Error Code Vehicle Speed Sensor Circuit Low Input

Jan 23, 2014 | 2005 Toyota Camry SE

2 Answers

Fault code 21 and 42 on 98 toyota corolla,can u tell me what sensor it is?


21 Oxygen sensor voltage remained between .35 and .7V
continuously despite feedback correction
42 Vehicle speed sensor output doesn't reach the computer

Info From:


http://www.corolland.com/repairs.html

Sep 15, 2010 | 1998 Toyota Corolla

1 Answer

Can you tell me the type of my engine by number 0080682 on Toyota landcruiser 80 vx, 1995 4200 diesel turbo


Market JapanYear 05/1999Make TOYOTAModel LAND CRUISERFrame HDJ101

Vehicle characteristics
GRADE: VXL: VXL TYPE DESTINATION: JPN: JAPAN ENGINE: 1HDFTE: 4200CC DIESEL TURBO TRANSMISSION: ATM: AUTOMATIC TRANSMISSION GEAR SHIFT TYPE: 4FC: ATM, 4-SPEED FLOOR SHIFT COLOR CODE: 057
TRIM CODE: FG41

Jan 08, 2010 | 1995 Toyota Land Cruiser

2 Answers

I got a P O 717 code what is it ???


P0717: Input/Turbine Speed Sensor Circuit No Signal.
This code shows because the computer isn't getting any signal from the sensor. Either the sensor is dead or there's a circuit issue (bad wiring, etc).

The Input/Turbine Speed Sensor is the sensor the computer uses to to monitor the the efficiency of the transmission. The computer reads the speed from the input shaft and compares it to the speed of the output shaft. If the speed is off it attempts to correct it by boosting the fluid pressure to compensate. When that fails it trips the P0717 error code. In most cases either the sensor is dead or there's a problem in the wiring harness.

There are issue of intermittent connection trouble with this circuit. That would cause the on off problem.
Hope this helps.

Nov 11, 2009 | 2003 Buick LeSabre

3 Answers

1999 ford expedition - transmission slip?


the flashing O/D light usually means you have a bad speed sensor that sends speed info to the engine & trans computer.

Vehicle Speed Sensor The vehicle speed sensor (VSS) (Figure 42) is a variable reluctance or Hall-effect sensor that generates a waveform with a frequency that is proportional to the speed of the vehicle. If the vehicle is moving at a relatively low velocity, the sensor produces a signal with a low frequency. As the vehicle velocity increases, the sensor generates a signal with a higher frequency. The PCM uses the frequency signal generated by the VSS (and other inputs) to control such parameters as fuel injection, ignition control, transmission/transaxle shift scheduling and torque converter clutch scheduling.
-------------------------------------------------------------------
Vehicle Speed Sensor The vehicle speed sensor (VSS) (Figure 42) is a variable reluctance or Hall-effect sensor that generates a waveform with a frequency that is proportional to the speed of the vehicle. If the vehicle is moving at a relatively low velocity, the sensor produces a signal with a low frequency. As the vehicle velocity increases, the sensor generates a signal with a higher frequency. The PCM uses the frequency signal generated by the VSS (and other inputs) to control such parameters as fuel injection, ignition control, transmission/transaxle shift scheduling and torque converter clutch scheduling.

-------------------------------------------
Some trans use an OSS, Output Shaft Sensor instead of a VSS. Depends on which trans you have, 4R100 or 4R70W

Transmission Control Switch (TCS) and Transmission Control Indicator Lamp (TCIL)
The transmission control switch (TCS) is a momentary contact switch. When the switch is pressed, a signal is sent to the powertrain control module (PCM) to allow automatic shifts from first through fourth gears or first through third gears only. The PCM energizes the transmission control indicator lamp (TCIL) when the switch is off.

The TCIL indicates overdrive cancel mode activated (lamp on) and electronic pressure control (EPC) circuit shorted (lamp flashing) or monitored sensor failure.

Output Shaft Speed (OSS) Sensor
The output shaft speed (OSS) sensor is a magnetic pickup, located at the output shaft ring gear, that sends a signal to the powertrain control module (PCM) to indicate transmission output shaft speed. The OSS is used for torque converter clutch control, shift scheduling and to determine electronic pressure control.

Apr 18, 2009 | 1998 Ford Expedition

1 Answer

The green overdrive light on the dash keeps flashing and the transmission jerks into gear. Any suggestions on how to solve this. The test codes that come are P1747, PO156, and PO161. I have already...


not an oxygen sensor



vehicle speed sensor or oss is most likely cause.


Output Shaft Speed Sensor (OSS) 7H103: The output shaft speed (OSS) sensor is a magnetic pickup, located at the output shaft ring gear that sends a signal to the powertrain control module to indicate transmission output shaft speed. The powertrain control module uses this signal for torque converter clutch control, shift scheduling, used in determining EPC pressure. Symptoms: No converter engagements, harsh shifts, abnormal shift schedules. DTC: P0720, P0721 std~us~en~file=d14110a.gif~gen~ref.gif


Vehicle Speed Sensor (VSS) 9E731: The vehicle speed sensor is a magnetic pickup that sends a signal to the powertrain control module. This VSS signal tells the PCM vehicle speed. The PCM uses this signal to modify upshift schedules. Symptoms: Shift engagement/disengagement (hunting) on grades. DTC: P0500, P0503, P1500, P1501, P1503

Mar 15, 2009 | 1996 Ford Thunderbird LX

3 Answers

The O/D off light is flashing on digital dash it's 3.0 turbo auto 1988. as well as that light the differential warning light comes on once the car travels a short distance approx 1/2 mile. Also the speedo...


I have the same problem with my 95 Toyota T100. My O/D off light started flashing when my speedometer cable broke this week-end. I assume the electronic transmission is using the speed data to manage the overdrive.
Have your speedometer problem fixed and your flashing light will turn off.

Nov 13, 2008 | Toyota Supra Cars & Trucks

1 Answer

Landcruiser KZJ95W engine problem


hi, better check the TCV (timing control valve) located below the injection pump.

Jun 27, 2008 | 1996 Toyota Land Cruiser

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