Chrysler SBEC III Computer Repair Manual | Free PDF Download

La Chrysler SBEC III Computer It is a control module used in vehicles Chrysler, Dodge, and Plymouth across 1996 and 2002.

It is responsible for the management of the engine and the electronic ignition and injection system.

This manual provides key information for your diagnosis and repair.

Read the Chrysler SBEC III Computer manual before downloading it

You can view the complete manual online before downloading it and consult its electrical diagrams and sensor tests.

What is the Chrysler SBEC III computer and how does it work?

The ECU SBEC III (Single Board Engine Controller) of 80 pins It is a control module that regulates engine operation, adjusting the air-fuel mixture, ignition timing, and emissions management. It also monitors sensors and actuators in real time.

Main functions of the SBEC III ECU

• Fuel injection control: It regulates the amount of fuel supplied to the cylinders.
• Ignition management: Synchronize the spark with the crankshaft movement.
• Sensor monitoring: It monitors airflow, coolant temperature, and intake pressure.
• Idle optimization: Adjust the speed to idle.
• Fault Diagnosis: Registers OBD-II codes.

Models and years compatible with the Chrysler SBEC III Computer

The ECU SBEC III of 80 terminals It is found in several models of Chrysler, Dodge, and Plymouth manufactured between 1996 and 2002, in engines 2.0L, 2.4L, 2.7L, 3.0L, 3.3L and 3.8L.

Compatible models include:

• Chrysler Concord (1996-2002)
• Chrysler New Yorker (1996)
• Chrysler Sebring (1998-2001)
• Chrysler Town & Country (1996-2002)
• Dodge avenger (1997-2002)
• Dodge Caravan (1999-2002)
• Dodge Intrepid (1998-2002)
• Dodge stratus (1998-2002)
• Plymouth Voyager (1996-2002)

Structure and connections of the Chrysler SBEC III Computer

The SBEC III computer is equipped with a connector for 80 pins that manages the signals from the motor's sensors and actuators.

• Pin 10: Ground feeding.
• Pin 20: Ignition voltage.
• Pin 46: Battery powered.
• Pin 50: Land of sensors.
• Pin 61: 5V voltage for sensors.

Diagnostic tests and electrical measurements

To assess the condition of the ECU and its wiring, tests can be performed using a multimeter or an oscilloscope. Here are some key tests:

1. Voltage test on main pins

2. Testing sensors connected to the ECU

• CKP Sensor (Crankshaft): Signal oscillating between 2.5V and 3.8V at idle.
• TPS (Throttle Position Sensor): Voltage range from 0.4V to 5V.
• ECT Sensor (Engine Temperature): Reading of 3V when cold and 0.5V when hot.

3. Oscilloscope Diagnosis

Using an oscilloscope allows you to visualize sensor signals in real time and facilitates the detection of intermittent faults.

Important notes about the Chrysler SBEC III Computer

• Compatible with OBD-II protocols.
• It is found in vehicles with engines from 2.0L to 3.8L.
• Before replacing the ECU, it is recommended to check the wiring.

More Recommended Resources for Car Repair

Download More Easy Mechanics Books and complete the entire collection for repairing ECU Automotive Computers.

We also recommend downloading the car workshop manuals, electrical diagrams and car parts catalogs to learn how to completely disassemble the car.

Automotive Computer Repair Equipment

For automotive computer repair, it is essential to have specialized tools that facilitate diagnosis and problem solving.

Below, we recommend the equipment and tools you should consider having in your workshop:

• Fuel Injection Simulator
• Professional Automotive Scanner
• Automotive Oscilloscope