PAT


suppliers


aaaa logo

Member of Australian Automotive Aftermarket Association

PRTC Council Member

4WD Council Member



Latest News

Oil Temperature Sensors (OTS)

What technicians need to know when diagnosing and testing oil temperature sensors on a vehicle.

The OTS may be utilised by many petrol and diesel vehicles as a “stand-alone” sensor or may be Integrated as part of the “oil level sensor” assembly. Generally, the petrol and Diesel engines may use the OTS signal to assist the ECU in performing varying system control and protective functions.

Note: in some cases, a combined – “Oil Pressure and Temperature” sensor may be used on some vehicles.

A Typical “stand - alone” Oil Temp Sensor A Typical integrated OTS and Oil level Sensor

A Typical OTS sensor function for petrol engine:

  • Hyundai petrol engine with CVVT (Variable Valve Timing)
  • Utilised to monitor the engine oil temperature for a more accurate CVVT operation.
  • May be known as a CVVT Oil Temp Sensor for this make of vehicle.

Typical Temperature to Resistance relationship for Hyundai OTS-001

Typical FG Falcon 4.0ltr Turbo OTS wiring diagram, specifications and test procedures:

Test equipment requirements for testing this signal is similar for tests carried out on a common engine coolant sensor.

  • Suitable scanner monitoring the engine oil temperature.
  • Multimeter monitoring the Sensor Earth plausibility as well as the output signal voltage as the engine oil alters temperature.

Note:  the ohm meter may be used directly on the sensor terminals with the harness disconnected to test for plausible resistance values at varying oil temperatures. (this is a guide only and not a thorough test)

Typical expected voltages:

  • Engine cold expected output voltage - Approx. 3.9V
  • Engine at 60 Deg C - Approx. 2.5V
  • Engine at normal operating temp - Approx. 1.2V

               
Resistance across the terminals:

  • Engine at 20 Deg C - Approx. 37 K Ohms
  • Engine at 90 Deg C - Approx. 2.8 K Ohms

Note: Any major variations to these specifications requires a thorough test on the Ground Circuit and wiring prior to any OTS renewal.

The test procedure may be necessary when a related Fault Code is logged.

P0195 – Engine Oil Temp Sensor Malfunction
P0196 – Engine Oil Temp Sensor Range/Performance
P0197 – Engine Oil Temp Sensor Low
P0198 – Engine Oil Temp Sensor High
P0199 – Engine Oil Temp Sensor Intermittent.

Note: Ensure other engine factors are considered when some of these codes are logged. Typically, Engine cooling system problems will affect expected oil temperatures.

A Typical OTS sensor function for Diesel engines:

The Engine OTS signal is utilised by the Powertrain Control Module (PCM) on a Diesel to “assist” in the calculation for when and how much fuel is required for optimum starting and engine operation.

Including:

  • Glow plug “ON” time
  • Dash glow plug “ON” time
  • Exhaust pressure regulator actuation
  • Idle speed
  • Fuel delivery
  • Injection timing.

Typical symptoms of a failed OTS unit or circuit:

  • Fault codes logged
  • Engine runs rough when cold but improves as heated.
  • Hesitation at light pedal low RPM.
  • Surging at constant low to mid RPM.
  • Engine may not re-crank when hot. Engine may need to cool prior to restarting.

Combination Engine Oil Temperature and Engine Oil Level Sensor.

Temperature Sensor, Oil Level Sensor and electronics combined in one unit.

Simple tests to be carried out.

  • Visual test – Any physical damage may cause oil leakage or poor electrical connection.
  • Supply Voltage and Ground plausibility. – A multimeter, scanner or suitable oscilloscope can be used to verify these results.
  • Output signals: A suitable scanner can display relevant temperature information. A suitable oscilloscope can display the signal plausibility.

The Premier Auto Trade Sensors range includes Oil Temperature Sensors (OTS) from the world’s leading manufacturers, covering almost 800,000 vehicle applications in Australia and NZ.

When you supply and fit products from Premier Auto Trade you can expect a product designed and tested to the vehicle manufacturer’s specifications offering OE form, fit and function.

Premier Auto Trade distributes products throughout Australia via a network of specialised resellers and leading automotive groups.



Latest News

Tech Tips - Wheel Speed Sensors (WSS)

Positive Crankcase Ventilation (PCV) and Oil Separators

Common Rail Diesel Pumps (HDP)

Exhaust Gas Temperature Sensor (EGT)

Hose Clamps

MAP Sensors (Manifold Absolute Pressure)

Electric Water Pumps

Pulse Width Modulation (PWM)

Mass Air Flow Sensors (Hot Wire/Film)

Petrol Fuel Injector Replacement

Electronic Throttle Bodies (TBO)

Dual Petrol Injection Systems – Technical Tip

Wheel Speed Sensors – More than just ABS

PAT Expands Emission Sensor Range

PAT Racing & Performance Injector Range Upgrade

Coils ain’t Coils!

ICON SERIES Range Grows

Oil Level and Oil Temperature Sensors Operation

Failed Air Temperature Sensors Symptoms

MAP Sensors Testing

TI Automotive Mustang Performance Pump

New ICON SERIES Hose Clamp Range

New Premium Sensors Ranges

Relay problems on vehicle

Test Equipment and Tools

Fuel Rail Sensors (FRS)

Failing Secondary Ignition

Testing Electric Fuel Pumps

Performance Fuel Rails and Filters

Testing CAM Angle Sensors (CAM)

Testing Electric Valve Solenoids (EVS)

Electronic Throttle Bodies

Performance Fuel Cells & Surge Tanks

Fault Finding Fuel Pressure Regulators (FPR)

Testing Variable Camshaft Actuators (VCA)

Testing Accelerator Pedal Position Sensors (APS)

Diagnosing Crank Angle Sensors (CAS)

Performance Regulators and Gauges

Differentiating Wheel Speed Sensors (WSS)

Mass Air Flow Sensors - Hot Film

Mechanical Fuel Pumps (MFP)

ICON Series Hoses

Particulate Matter Sensors (PMS)

Performance Fuel Injectors

Fuel Injectors (GDI)

DENSO Spark Plugs

Performance Fuel Pumps

Cooling Fan Switches (CFS)

Water Temperature Sensors (WTS)

Reverse Light Switches

Oil Temperature Sensors (OTS)

BMC Air Filters

Flasher Cans

Exhaust Pressure Sensors (EPS)

Power Steering Switches

Coolant Temperature Sensors (CTS)

Variable Intake Manifolds (VIM) and Intake Control Valves (ICV)

Oil Level Sensors (OLS)

Throttle Position Sensors (TPS)

Air Temperature Sensors (ATS)

Ignition – Condensers, Contact Sets, Distributor Caps and Rotors

Fuel System Accessories (FSA)

MAP Sensors (MAP)

Relays (REL)

HALL Sensors and Pickups (HAL)

Fuel Rail Sensors (FRS)

Speed Sensors (SPS)

New ICON Series Fuel Pump Range

New ICON Series Hose Range

Performance Range Increase Continues

PAT Oxygen Sensor Range Expands

PAT Expands Automotive Aftermarket Presence

Equipment and Tools

Electric Fuel Pumps (EFP)

Electric Valve Solenoids (EVS)

CAM Angle Sensors (CAM)

Ignition Modules (MOD)

Injector Service Components

Exhaust Gas Temperature Sensors (EGT)

Throttle Bodies

Knock Sensors

Ignition Coils

Fuel Injectors (Petrol)

Variable Camshaft Actuators (VCA) Oil control Valves

Accelerator Pedal Position Sensors (APPS)

Exhaust Gas Recirculation Valves (EGR)

Relocation of Sydney Distribution Centre

Wheel Speed Sensors (WSS)

High Tension - Ignition Lead Sets (ILS)

Suction Control Valves (SCV)

Mass Air Flow (MAF) Sensors

Crank Angle Sensors (CAS)

Fuel Pressure Regulators (FPR)

Oil Pressure Sensors

Exhaust Gas Oxygen Sensors

Shedding Light on Stop Light Switches

Ignition Distributors

Common Rail Diesel (CRD) Fuel Injectors

Idle Speed Control

New Distribution Centre Opening in ADELAIDE

New Distribution Centres Opening in PERTH and DARWIN

New Fuel Catalogue from Premier Auto Trade

BMC 4WD Air Filters Range Expands

New MVP Fuel Injector Range

PAT Developing Programs on Demand

New Premium Packaging for PAT

New Product Ranges Released By PAT

PlusQuip Test Equipment Range Expands

New Raceworks Catalogue

New Exhaust Gas Temperature Sensors

New Trade Catalogues from Premier Auto Trade

New Distribution Centre Opening in Adelaide

More European Parts from Premier Auto Trade

New PlusQuip Fuse Current Tester

PAT Pumped up!

Coils ain't Coils!

New PlusQuip Electronic EGR, Throttle Body, and Actuator Tester

New breed of High Performance products!

New Ignition Coil and Lead Set Kits

Wheel Speed Sensor Program Launched

Premier Ignition Lead Program Launch

Ignition Coils - Coils ain't Coils!

PlusQuip Battery Testers Launch

Premier Auto Trade Supporting Local Racing

Oval Trumpet Airbox (OTA) for 4WD applications from BMC Air Filters

BMC Air Filters NOW AVAILABLE from Premier Auto Trade

Premier Ignition Coils

MAP-013 and KNS-021 Now Back in Stock

BMC Air Filter partners with Premier Auto Trade

Premier Auto Trade opens South Australian Distribution Centre

Direct Fit Oxygen Sensor Range Hits 700

Automotive Electro-Mechanical Relays Types / Faults / Diagnosis

PlusQuip Tools and Equipment Launch

PlusQuip Fuel Line Repair Kit

PlusQuip Fuel Injector Service Kit

E85 High Performance with Premier Auto Trade

Testing EGR Systems (Pt 2)

New Delphi Fuel Module and Ignition Coil Range

Fuel Injector Service Components from Premier Auto Trade

Older News...

   privacy statement   terms of use   terms and conditions   sitemap   news  

© PremierAutoTrade