Geely Diagnosis Flow. Manual part — 31

121

No.067 JL376/378QE engine’s electric control system check

Testing
step

Testing terminal

Component, part check

Preparations for testing conditions

Rated value

01

Sealing of intake system

Ignition closed, take out plug of controller, and intake pipe in front of throttle valve is sealed with
proper materials. Take out connecting pipe of canister control valve of throttle vavle body.
Apply compressed air, and make pressure within intake pipe as about 1-2bar. Check liquid
leaking, and check all sealing seams. After check, reassemble connecting pipe of canister

No generation of bulb

02

Fuel

device

Ignition closed, take out plug of controller, and connect pressure gauge at fuel high-tension
loop. Take out fuel return pipe of the pressure regulator, and install auxiliary hose on the
connector of pressure regulator. And auxiliary hose leads to one proper barrel (with capacity of
at least 2 liters). 46 and 3 pins on the controller are earthed at the same time, making oil pmp
rotate 30 seconds.

02.1

Oil supply of fuel pump

Carry out same as step 02

700-1000ccm

02.2

Fuel

pressure

Carry

out same as step 02

2.8—3 bar

02.3

Oil return pipe

Remove auxiliary hose, and connect return pipe to oil tank, and ignition is switched on, and 3
and 46 terminals of controller plug are earthed (with auxiliary cable). Read out pressure of
pressure gauge, and disconnect earth connection, and ignition is closed.

Max. 2.9—3.1 bar

02.4

pressure

maintenance

After about 10 seconds, read pressure of the monograph again, and record dropped value of
the pressure.

0.2-0.3 bar

02.5

pressure regulator
function

Plug in the controller, and the engine will start and operate at idling speed. Record fuel
pressure at idling speed, and increase the throttle, and meanwhile observe pressure gauge,
and pressure must be increased

About 2.5 bar,


About 2.8 bar

02.6

Power supply of fuel pump

Ignition closed, and take out controller plug, and connect the voltmeter to plug of fuel pump,
and make 3 and 46 terminals of controller plug earthed at the same time (with auxiliary cable).
And fuel pump must be operating, and read out power supply voltage.

Min. 10.7V

122

02.7

Voltage drop of anode
side

Same as description of 02.6, but multimeter placed to another terminal.

Max. 0.5V

02.8

Voltage drop of cathode
side

Same as description of 02.6, but multimeter placed to another terminal.

Max. 0.5V

02.9

Total value of voltage drop Values calculated based on 02.7 and 02.8.

Max. 0.8V

03.0

Earth connection

of

constant anode to
controller

Ignition closed, take out controller plug and connect multimeter

03.1 18．．．2

Constant anode, earthing
terminal 2

Carry out same as step 3.0

About 12V

03.2 18.

14

Constant anode, earthing
terminal 14

Carry out same as step 3.0

About 12V

03.3 18． 19

Constant anode, earthing
terminal 19

Carry out same as step 3.0

About 12V

03.4 18…24

Constant anode, earthing
terminal 24

Carry out same as step 3.0

About 12V

04.0

Anode to controller earth
connection, voltage drop
ignition switch

Ignition closed, take out controller plug, load resistance and voltmeter connection

＜

0.3V

04.1

B+ 18

Voltage drop terminal 18

Load resistance terminal 18 and 2

＜

0．3V

04.2

B- 2

Earth wire terminal 2

Load resistance terminal 18 and 2

＜

0．3V

04.3

B- 4

Earth wire terminal 4

Load resistance terminal 18 and 4

＜

0．3V

04.4

B- 19

Earth wire terminal 19

Load resistance terminal 18 and 19

＜

0．3V

04.5

B- 24

Earth wire terminal 24

Load resistance terminal 18 and 24

＜

0．3V

04.6

B+ 27

Voltage drop terminal 27

Load resistance terminal 18 and 27, ignition turned on

＜

0．3V

04.7

B+ 37

Voltage drop terminal 37

Load resistance terminal 18 and 37, ignition turned on

＜

0．3V

05.1

Hall sensor 1...3

Power supply hall sensor Ignition closed, controller plug inserted. Connect voltmeter, and turn on ignition. About

5

123

05.2

Hall sensor 1...2

Hall sensor signal

Close ignition, insert controller plug and connect voltmeter. Take out socket connector of
ignition coil with ignition switch, and take out distributor cover. With ignition turned on, slowly
rotate belt pulley of engine crankshaft manually, and observe shading rotor of measuring
instrument and hall sensor.

When replacing shading
rotor, one voltage larger
than 2V must be displayed

05.3

Hall sensor based on
terminal 12 and ECU

To anode conductor
connection of hall sensor

Close ignition, take out controller plug and connect the multimeter.

＜

0.5Ω

05.4

Hall sensor based on
terminal 48 and ECU

To cathode conductor
connection of hall sensor

Same as Step 5.3, with multimeter connected to another terminal

＜

0.5Ω

05.5

Hall sensor based on
terminal 49 and ECU

Connection from hall
sensor to controller
conductor

Same as Step 5.3, with multimeter connected to another terminal

＜

0.5Ω

06.1

Pressure sensor terminal
3...1

power supply from intake
pipe pressure sensor

Ignition closed, and connect controller. Connect the voltmeter to plug of pressure sensor, and
ignition turned on

约

5

06.2

Pressure sensor terminal
4...1

Intake pipe pressure
sensor signal

Same as Step 6.1, with voltmeter connected to another terminal

3．8V 4.2V

06.3

Pressure sensor terminal
4...1

Intake pipe pressure
sensor signal when the
engine is no-load running

Same as Step 6.2, with engine running at idling speed

10.8V
1.3

06.4

Pressure sensor terminal
4...1

Intake pipe pressure
sensor signal when
increasing throttle

Same as Step 6.2; step on the throttle, and observe voltmeter

电压变化

06.5

Pressure sensor terminal
3 and ECU terminal 12

Anode conductor
connection to pressure
sensor

Ignition closed, take out controller plug, and connect resistance and measure

＜

0.5Ω

06.6

Pressure sensor terminal
1 and ECU terminal 30

Cathode conductor
connection to pressure
sensor

Same as Step 6.5; connect multimeter

＜

0.5Ω

06.7

Pressure sensor terminal
4 and ECU terminal 7

Signal conductor
connection to controller

Same as Step 6.5; connect multimeter

＜

0.5Ω

07.1

Pressure sensor terminal
1...2

Power supply from intake
temperature sensor

Close ignition, connect controller plug, and take out connection of socket connector of pressure
sensor, and connect voltmeter to plug of pressure sensor, ignition

About 5V

07.2

Pressure sensor terminal
1...2

Intake temperature sensor
signal

Same as Step 07.1, connect plug of pressure sensor. Note: this value is related to temperature 0.5…3V

07.3

Pressure sensor terminal
1...2

Intake temperature sensor
resistance

Close ignition, take out plug of pressure sensor. Connect multimeter of pressure sensor. Note:
this value is related to temperature

At 20

124

07.4

Pressure sensor terminal
2 to controller terminal 44

Intake temperature sensor
signal conductor

Close ignition, take out controller plug, and connect multimeter

＜

0.5Ω

08.1

Throttle position sensor
terminal 1..2

Power supply from throttle
sensor

Close ignition, connect controller plug, and connect voltmeter, ignition turned on

About 5V

08.2

Throttle position sensor
terminal 2..3

Throttle sensor signal
voltage, throttle closed,
throttle sensor signal
voltage

Same as Step 8.1, voltmeter connected to throttle, closed

0.1…0.9V

08.3

Throttle position sensor
terminal 2..3

Throttle all opened

Same as Step 8.2, whole throttle opened

3.0…4.8V

08.4

Throttle position sensor
terminal 2..3

Throttle sensor signal
voltage inspection. Note:
this inspection only
possible with connecting
one oscillograph

Same as Step 8.2, but connect one oscillograph to replace voltmeter, with throttle quickly
opened and closed sever

Oscillograph without
voltage interference

08.5

Throttle position sensor
terminal 1 and ECU
terminal 12

Connection between
anode conductor to
throttle sensor

Close ignition, take out controller plug, and connect resistance and measure

＜

0.5Ω

08.6 Throttle position sensor

terminal 2 and ECU
terminal 30

Connection between
cathode conductor to
throttle sensor

Same as Step 8.5, with multimeter connected to terminal

＜

0.5Ω

08.7 Throttle position sensor

terminal 3 and ECU
terminal 53

Signal conductor to
controller conductor

Same as Step 8.5, with multimeter connected to terminal

＜

0.5Ω

09.1

Knocking sensor terminal
2 and ECU terminal 30

Cathode conductor to
controller conductor

Close ignition, take out controller plug, and connect multimeter

＜

0.5Ω

09.2

Knocking sensor terminal
1 and ECU terminal 11

Connection between
signal conductor to
controller

Same as Step 9.1

＜

0.5Ω

09.3

Knocking sensor terminal
3 and ECU terminal 19

Shielded conductor
connection

Same as Step 9.1, with multimeter connected to another terminal

＜

0.5Ω

09.4

Knocking sensor terminal
1…2

Internal resistance of
knocking sensor

Disconnect socket connector of knocking sensor, and connect multimeter

4.5…5.5V

10.1

Oxygen sensor terminal
1…2

Power supply for heating
element of oxygen sensor

Close ignition, plug in controller, with voltmeter connected to two white conductors connecting
to socket connector of oxygen sensor, and start the engine to be running at idling speed

12...14V

10.2

Oxygen sensor terminal
1…2

Internal resistance of PTC
heating element

Close ignition, and disconnect socket connector of oxygen sensor, and connect multimeter to
two white conductors of oxygen sensor. Note: this value is related to temperature.

0.2...20

10.3

Oxygen sensor 1…2

Current consumption of Close ignition, ampere meter with suitable commutator conductor, connecting to one white