Modules
- Powertrain Control Module (PCM)
- General Electronic Module (GEM)
- Instrument panel
- Auxiliary instrument panel
- ABS module/Electronic Stability Program (ESP) module
- Airbag diagnostic monitor.
- Trip computer module
- Electronic Automatic Temperature Control (EATC) module
- Additional heater
- Xenon headlight control module/headlight leveling sensor
- Injector Control Module (IDM)
- Data Link Connector (DLC)
- Diagnostic plug connector for xenon headlights
Network Elements
The intermodule communication network in this vehicle uses three different types of data buses, which can be divided into data buses and diagnostic buses. The intermodule communication network allows control of various functions (ABS, engine management, airbag management, etc.), and the diagnostic network speeds up the process of troubleshooting and troubleshooting.
- The SCP (Standard Corporate Protocol) bus is two twisted wires (lines). Communication along these lines occurs both between the modules themselves and between the modules and the diagnostic tester. Even if there is a break in one of the lines, a short circuit to ground or a short circuit to the power supply circuit, communication between the modules and the diagnostic tester is maintained, provided by the other line.
- The K-line ISO 9141 bus is a single line. In the event of a break, short circuit to ground or short circuit to the power supply, communication between the module and the diagnostic tester is not possible.
- The CAN (Controller Area Network) bus enables communication between modules and, via the DLC, with the diagnostic tester. This serial data bus is designed for use in vehicles and enables communication even if one of the modules fails.
The Data Link Connector (DLC) is the standard communication interface between the buses (SCP, ISO and CAN) and the diagnostic tester. The EEPROM programming signal and power supply for the diagnostic tester also occurs via this 16-pin connector.
The xenon headlight diagnostic plug is installed at the front of the vehicle and enables basic adjustment of the xenon headlights using a diagnostic tester while visually monitoring both headlights. The xenon headlight diagnostic plug is connected to the DLC via the K-Line ISO 9141 bus.
Modules:
The Powertrain Control Module (PCM) controls all functions related to engine and exhaust management. This module communicates with the ESP module, ABS module, instrument cluster, sub-instrument cluster, EATC and DLC via the SCP bus or with the Injector Control Module (IDM) via the CAN bus.
The GEM (General Electronic Module) is connected to the Data Link Connector (DLC) via the K-Line ISO 9141 bus and is responsible for the following functions:
- Direction indicators.
- Warning of danger
- Interior lighting
- Anti-theft system
- Central locking
- Heated windshield
- Rear window heating
- Windscreen wiper/washer controls
- Energy saving relay
- Seat Belt System Warnings
- Shock sensor
- Light on warning
The instrument cluster is connected to the Data Link Connector (DLC) via the SCP bus and includes the following functions:
- Speedometer
- Tachometer
- Odometer
- Odometer
- Fuel level indicator
- Engine temperature gauge
- Indicators and control lamps
The auxiliary instrument cluster is connected to the Data Link Connector (DLC) via the SCP bus and includes the following monitoring functions:
- Oil temperature
- Oil pressure
- Ice warning indicator light
The vehicle is equipped with either an ABS module (with or without TCS) or an Electronic Stability Program (ESP) module.
- The ABS module without TCS controls the anti-lock brake system and has different software than the ABS module with TCS, but is otherwise identical. The ABS module communicates with the DLC via the K-Line ISO 9141 and SCP buses.
- The ABS module with TCS controls the anti-lock brake system and traction control and is connected to the DLC via the K-Line ISO 9141 and SCP buses.
- The ESP module controls the directional stability control system in addition to the anti-lock braking system (ABS) and the traction control system (TCS). The ESP module communicates with the DLC via the K-Line ISO 9141 and SCP buses.
The airbag diagnostic monitor controls the driver and passenger airbags, side airbags and pyrotechnic seat belt tensioners. The airbag diagnostic monitor module communicates with the DLC via the ISO 9141 diagnostic data bus.
The trip computer module is connected to the DLC via the ISO 9141 diagnostic data bus. The trip computer provides the driver with additional information about the vehicle's condition and, accordingly, the surrounding environment and includes the following functions:
- Fuel consumption
- Time information
- Measuring distance
- Outdoor temperature display
The EATC module communicates with the DLC via the SCP and K-Line ISO 9141 buses. The main function of this module is to automatically control the temperature in the A/C system by controlling the air flow, air distribution and air temperature. The EATC module controls the following subsystems and includes some additional switches.
- A/C switch
- Air distribution switch
- Recirculation flap switch
- Electric fan controller
- Windshield heating switch
- Rear Window Defogger Switch
The auxiliary heater is a fuel-fired heating system that heats the coolant in the diesel engine cooling system at low outside temperatures. The auxiliary heater communicates with the DLC via the ISO 9141 diagnostic data bus.
The xenon headlight control module/headlight levelling sensor is responsible for the automatic adjustment of the xenon headlights depending on the vehicle load and speed. The speed signal comes from the PCM, and the load status is detected by two sensors, one on each axle. In addition to this function, the module functions as a DC/DC converter, which supplies the sensors with a constant 5 V supply. The xenon headlight control module/headlight levelling sensor communicates with the DLC and the xenon headlight diagnostic plug via the ISO 9141 diagnostic data bus.
The Injector Control Module (IDM) is responsible for controlled fuel injection and communicates with the PCM via the CAN data bus.
Operating principle
Communication between the diagnostic system tester and the modules is carried out via two different data buses:
Data Communication Bus (SCP)
- Powertrain Control Module (PCM)
- Instrument panel
Data bus (ISO 9141)
- ABS module / ESP module (The steering wheel position sensor communicates with the ESP module via the data bus (SCP)). Diagnosis is performed via the ESP module and then via the data bus (ISO 9141).
- Central Timer Module (CTM)
- Anti-theft alarm module / double door locking
- Trip computer module
- Radio/Road Communication System Module
- Airbag module
- Additional heater
This publication was borrowed from the website (www.FordBook.ru)