Geely Diagnosis Flow. Manual part — 100

397

valves to judge the breakdown of the refrigeration system. The inspection shall be made when the air
temperature is between 30 ~35oC and the engine speed is 2000r/min. The fan wind speed is adjusted to the
high gear and the temperature is adjusted to the Max. refrigerating gear. The normal condition is that: the
pressure at the high-pressure side is 1.2Mpa ~ 1.8Mpa and that at the low-pressure side is 0.15 Mpa ~
0.20Mpa; the system may have a failure if it is out of this scope. 7). Other inspection methods
(1) Condenser: the thermometer is used for thermometer under normal operation. When the condenser air-in
temperature is about 35oC, the air-out temperature shall be about 55oC.
(2) Continual reduction of the air volume at the air outlet means the frosting on the evaporator surface.
(3) Dry reservoir: inconsistency of the temperature on upper and lower side of the dry reservoir shell means
there is the block inside the dry reservoir.

Maintenance and diagnoses of electronic power-assisted steering system

No.291 Line inspection of "EPS" indicating lamp (the "EPS" indicator

does not light up when the ignition switch is opened)

1. Battery
2. Main fuse
3. Ignition switch
4. Circuit fuse (15A)
5. Control module
6. EPS lamp
7. Main fuse
8. Control box socket
9. Connector

Step Operation

Yes

No

1

Are the main fuse and the line fuse in good condition
or not ?

Go to step 2

The main fuse and the line fuse is
broken

2

1. Turn on the ignition switch
2. Inspect the voltage between the terminal "A6"
and the module case earthing
3、Is it the battery voltage?

Go to step 3

“B/W” wire is broken or short circuit

3

1. Check the voltage between the terminal "A8" and
the module case earthing
2. Is it the battery voltage?

Go to step 4

"B/R" wire is broken or short circuit

4

1. Turn off the ignition switch and disconnect the
connector 8 from the control module
2. Disconnect the body ground terminal "A3" on the
connector "8" body
3. Turn on the ignition switch again, is the "EPS"
lamp light up?

Go to step 5

The bulb is burnt out or the "V/G" wire is
broken

5

1. Is the connection between the connector "8" and
the control module firm?

Terminal “A6”，“A7”
" A3 " or " A8 " is in
poor contact; the
control module case
is in poor earthing;
"B" wire
+12V is broken

Poor connection

398

No.292 Inspection to "EPS" indicator line ("EPS" indicator does not

light up or keep on lighting up when the cross-line connection is made

between the diagnoses switch terminal and the ground terminal)

Step Operation

Yes

No

1

1. If terminal "A2" of the connector "9" is perfectly connected to
the control module

Go to step 2

Poor contact

2

1. Earth the "A2" terminal by wire under the condition that the
connector is connected with the control module
2. Turn on the ignition switch, is the "EPS" lamp flicking?

1、The maintenance line
is broken
2、. "B/W" line is broken
or "B" line is in poor earth

Recheck it with replaced
control module

No.293 Main line of DTC11 torque sensor (the main line is broken or

short circuit)

Step Operation

Yes

No

1

1、Remove the protective cover of the steering column hole
2、 Turn on the ignition switch and put the steering wheel
towards the right front direction of the vehicle, and check if
the terminal voltage of the torque sensor bar foot center "B5"
wire is about 2.5V.

1. "W" wire is broken
2. Terminal "B5" is in poor
connection
3. Recheck it with replaced
control module if the above
conditions are normal

Go to step 2

2

1. Close the master switch and disconnect the torque sensor
rod head
2. Check the resistance between terminals "B5" and "B2" of
the torque sensor
3. Whether it is about 0.96kΩ

1. "W" wire to the battery is
short circuit or earthed
2. The torque sensor connector
is in poor contact with the line

The torque sensor has
defects

No.294 DTC13 torque sensor (there is big difference between the

auxiliary line outputs of the main line and the torque sensor)

Step Operation

Yes

No

1. Remove the protective cover of the steering column hole
2. Turn off the ignition switch and disconnect the torque sensing unit
3、 Inspect the resistance between the torque sensor side plug-in unit
terminals according to the following state

About 0.96 KΩ

The steering wheel faces
towards right ahead

About 0.48 KΩ

The steering wheel steers
entirely
right

“R—B”

About 1.02 KΩ

The steering wheel steers
entirely
Left

1

“R—W”

About 0.96 KΩ

The steering wheel face
towards right ahead

1"W" or "B" lines are in
poor condition
2. Terminals "B5" or
"B4" are in poor
connection
3. Recheck it with
replaced control module
if the above conditions
are normal

The torque
sensor is
broken down

399

About 1.02 KΩ

The steering wheel steers
entirely
Right

About 0.48 KΩ

The steering wheel steers
entirely
left

No.295 DTC14 torque sensor (power supply voltage of the torque

sensor is too high or too low)

Step Operation

Yes

No

1

1）Remove the protective cover of the steering column hole
2）Turn on the ignition switch and check the voltage between
"R" wire of the torque sensor connector and the terminal
ground
3）Is it about 5V?

Recheck it with replaced control
module

Go to step 2

2

1）Turn off the ignition switch and disconnect the torque
sensor connector
2） Check the resistance between "R" wire of the torque
sensor connector and the terminal ground
3）Is it about 1.09 KΩ?

1） Terminal "B2" or "B3" is in
poor connection
2） Harness of the torque sensor
plug-in unit is in poor contact
3) "R" or "G" line is disconnected
4） "R" or "G" line is grounded and
the battery are short

The torque sensor
is broken down

No.296 Auxiliary line of DTC15 torque sensor (the auxiliary line is

disconnected or short circuit)

Step Operation

Yes

No

1

1）Remove the protective cover of the steering column hole
2） Turn on the ignition switch and put the steering wheel to
the front moving position of the vehicle; check the voltage of
"B" terminal on the torque sensor connector.
3）Is it about 5V?

1）"B" wire is disconnected
2）Terminal "B4" is in poor contact
3）Recheck it with replaced control
module if the above conditions
are normal

Go to step 2

2

1）Turn off the ignition switch and disconnect the torque
sensor connector.
2）Check the resistance between "R" wire and "W" wire or
between "R" and "B" terminals on the torque sensor
connector
3）Is it about 0.96 kΩ?

1）"B" wire is ground or the battery
is short
2）The torque sensor connector is
in poor contact with the harness

The torque sensor
is broken down

No.297 DTC22 engine speed signal (no engine signal input)

Step Operation

Yes No

1

Does the tachometer display the engine speed
signal?
0-1V

Go to step 2

1）The connector is in poor
connection or the line is
broken
2 ） There is no rotation
speed signal output in ECU

400

2

1 ） Remove the control module and connect the
control module connector when the ignition switch is
off.
2）Check the voltage between "A4" terminal of the
control module and the earthing when the ignition
switch is on; check the resistance between "R" line of
the torque sensor connector and the terminal ground
3）Is it 8~12V?

"A4" is in poor connection;
replace with a good control
module if the connection is
normal

"Br" line is broken