OBDII Scantool for windows






OBDII Scantool for windows

OBDII Scantool for Windows

OBDII Scantool for Windows

The AutoTap scan tool connects the special OBD II (CAN) plug-in-port on or under the dash of your car or light truck to your computer. The AutoTap scanner then translates the...

ABOUT FLASH REPROGRAMMING PCMs

ABOUT FLASH REPROGRAMMING PCMs

flash reprogrammable EEPROM (Electronically Erasable Program Read Only Memory) chip. PCMs built with EEPROM chips can be reprogrammed in a matter of minutes without having to remov...

Analyzing Ignition Misfires

Analyzing Ignition Misfires

Misfire diagnosis in this kind of situation should be fairly easy. You have a code, you know which cylinder is misbehaving, and you can hear and feel the misfire. The cause has to ...

CATALYTIC CONVERTERS & O2 SENSORS

CATALYTIC CONVERTERS & O2 SENSORS

What is the most important emissions control device on a vehicle today? The catalytic converter, because it cleans up any exhaust pollutants that exit the engine. It's a hot job...

Diagnosing an Engine Misfire

Diagnosing an Engine Misfire

What is the most important emissions control device on a vehicle today? The catalytic converter, because it cleans up any exhaust pollutants that exit the engine. It's a hot job...

DIAGNOSING FUEL DELIVERY PROBLEMS

DIAGNOSING FUEL DELIVERY PROBLEMS

Rich fuel mixtures make more power (12:1 is considered optimum) but also increase fuel consumption and pollution (namely carbon monoxide emissions). "Lean" fuel mixtures...

DIAGNOSING LIGHT-DUTY DIESELS

DIAGNOSING LIGHT-DUTY DIESELS

One of the first things you should check when diagnosing a "hard to start" symptom, therefore, is the dipstick. If the oil is thick and globby, it may not be the correct viscosity ...

Diagnosing Misfires

Diagnosing Misfires

Loss of compression means the cylinder loses most of its air/fuel mixture before it can be ignited. The most likely causes here are a leaky (burned) exhaust valve or a blown head...

DIAGNOSING THE BATTERY, CHARGING & IGNITION SYSTEM

DIAGNOSING THE BATTERY, CHARGING & IGNITION SYSTEM

Throwing parts at a problem until it goes away is a very expensive way of fixing faults. The "no return" policy of many parts stores means that once you've installed an electrical...

DIAGNOSING THE BATTERY, CHARGING & IGNITION SYSTEM

DIAGNOSING THE BATTERY, CHARGING & IGNITION SYSTEM

After reviewing the vehicle's wiring diagram, the PO700 was most likely set due to the PO123 DTC since the signal wire from the TP sensor goes to both the PCM and the TCM. By looki...

Distributorless Ignition Systems (DIS)

Distributorless Ignition Systems (DIS)

If an engine cranks but won't start, is it fuel, ignition or compression? Ignition is usually the easiest of the three to check because on most engines, all you have to do is pull ...

INTRODUCTION TO ENGINE MANAGEMENT SYSTEMS

INTRODUCTION TO ENGINE MANAGEMENT SYSTEMS

From the outside, most PCMs look similar: just a metal box with some connectors on it. The PCM's job is to manage the powertrain. This includes the engine's ignition system, fuel...

OBD II AND EMISSIONS TESTING

OBD II AND EMISSIONS TESTING

Are you up to speed on OBD II? You should be because starting in 2002, a number of states have announced plans to change their emissions testing programs over to OBD II....

OBDII: PAST, PRESENT & FUTURE

OBDII: PAST, PRESENT & FUTURE

OBDII different from all the self-diagnostic systems that proceeded it is that OBDII is strictly emissions oriented. In other words, it will illuminate the Malfunction Indicator La...

Onboard diagnostics demystified

Onboard diagnostics demystified

Monitoring the operation of the various inputs and outputs is what on-board diagnostics is all about. When computerized engine controls went nationwide in 1981 to comply with feder...