Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Electronic Control System Description

Electronic Control System Description

The electronic control system consists of various sensors which detect the state of engine and driving conditions, ECM which controls various devices according to the signals from the sensors and various controlled devices. Functionally, it is divided into the following sub systems:
- Fuel injection control system
- Heated oxygen sensor heater control system
- Idle air control system
- Fuel pump control system
- Evaporative emission control system
- Ignition control system
- EGR system
- MT valve control system
- Electric throttle body control system
- Radiator cooling fan control system
- A/F sensor heater control system
- A/C control system
- Immobilizer control system (if equipped)
- Controller communication system

Especially, ECM (Engine Control Module), BCM (Body electrical Control Module), combination meter, TCM (Transmission Control Module (For A/T model)), ABS / ESP(R) control module (if equipped), steering angle sensor (if equipped), 4WD control module (if equipped) and keyless start control module (if equipped) intercommunicate by means of CAN (Controller Area Network) communication.

Electronic Control System Location

Electronic Control System Location:






Electronic Control System Flow Chart




Engine And Emission Control Input/Output Table (Part 1):




Engine And Emission Control Input/Output Table (Part 2):






Electronic Control System Wiring Circuit Diagram

Electronic Control System Wiring Circuit Diagram:






Terminal arrangement of ECM (PCM) connector (Viewed from harness side)

Terminal arrangement of ECM (PCM) connector (Viewed from harness side):






ECM connector "C37"









ECM connector "E23"