Geely EC715 2009, Workshop Manual

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2.2.2 Description and Operation
2.2.2.1 Overview
The engine use an electronic control system manufactured by
UAES(United Automotive Electronic Systems Co., Ltd.). It
consists of the engine control module (ECM), ECM working
circuit, system input and output parts. ECM is located at the
right side of the Air-Conditioning blower and is the engine
control system control center. It continues to monitor the
signals from various sensors and controls the various systems
performance. Engine control module also performs system
diagnostics, it can identify the operational malfunction and
through the malfunction indicator light (MIL) to remind the driver
and store DTC codes in order to facilitate maintenance
personnel for maintenance.
If the engine control module is damaged, there is no single
spare part within the module can be repaired. ECM must be
replaced as a whole.
Input components: crankshaft position sensor (CKP), camshaft
position sensor (CMP), intake air pressure and temperature
sensors [intake air pressure sensor (MAP), with intake air
temperature sensor (IAT)] , knock sensor (KS), throttle position
sensor (TPS), evaporation tank surface temperature sensor,
engine coolant temperature sensor (ECT), vehicle speed
sensor (VSS), pre-catalytic heated oxygen sensor (HO
2
S),
post-catalytic heated oxygen sensor (HO
2
S), air conditioning
pressure switch, power steering switch, defrost heating enable
input, CAN information input, serial data bus input.
Output components: idle speed control valve (IAC) ,1-2-3-4-
cylinder fuel injectors, ignition coils, variable valve timing
solenoid valve (VVT), canister solenoid valve (EVAP), the main
relay, pump relay and oil pump, cooling fan low speed relay,
cooling fan high speed relay, air-conditioning compressor
relay, CAN information output, serial data bus out.
2.2.2.2 Input Components
1. Crankshaft Position Sensor (CKP)
FE02-5121b
The crankshaft position sensor output can be used to
determine crankshaft position and rotation speed. Crankshaft
position sensor is a magnetic-electric sensor, which is installed
in the front end of the transmission housing, and tightened with
bolts, below the coolant temperature sensor. Flywheel signal
plate and the crankshaft sensor is an integrated part. The
sensor extends out through the bearing. The gap between the
sensor and the signal plate teeth is below 1.2mm. The signal
plate has 58 machined slots, of which 57 slots have a 6 °
interval. The last tooth slot is wider, used to generate
synchronization pulses. When the crankshaft rotates, the
sensor plate slot will change the sensor magnetic field,
resulting in an induced voltage pulse. The 58th slot pulse is
longer and can be used to identify a specific direction of the
crankshaft, so that the engine control module (ECM) may at
any time determine the direction of the crankshaft. Engine
control module uses this information to generate the ignition
timing and fuel injection pulse, and then controls the ignition
coil and fuel injectors. Sensor signals pass through ECM
harness connector EN01 terminal No.46,47 to ECM, if the
engine control module detects the sensor signals erratic or
incorrect, it will record DTC code P0321, P0322. and DTC code
P0016 will be recorded when the camshaft relative position is
not correct.
2-14 Control System JL4G18-D Engine
EC718/EC718RV EC715/EC715RV 10/2009