Page 70 - Foton Workshop Manual - Auman EST-M

DI - 16 Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts

Fault of engine control module (ECM)
Overview

Electronic control module (ECM) is the core of electronic control common rail system. ECU collects the
information for current work of engine through all the sensors and switches, analyzes and calculate the
information, and controls the fuel injection capacity, injection timing and pressure, etc of engine as per the
best preset operating parameters, so as to adjust the operation state of engine for the purposes of fuel energy,
high efficiency and low emission.
ECM terminal diagram
Caution
The terminals not indicated in the table are empty terminals

Whole vehicle

Terminal Terminal
Function Function
number number

Engine ECU module battery constant power
1 48 Urea pump temperature signal
supply
2 Electric ground 53 Urea heating signal
Engine ECU module battery constant power
3 54 Exhaust braking relay coil -
supply
Urea metering valve-/start/pre-heating relay
4 Electric ground 57
grounding
Engine ECU module battery constant power
5 58 Manual braking switch signal
supply

6 Electric ground 59 Cruise deceleration switch signal
9 Starter relay control signal 62 CAN-H
Control signal of air controlled solenoid
13 65 Electric accelerator sensor 1 ground
valve
15 Ignition switch ON power supply 66 Urea pump assembly sensor feedback signal
18 Clutch switch signal 67 Fuel water separation sensor -

DI-016