Chery A15. Manual — part 267

3. Troubleshooting procedure

Step Description

Yes

No

1

Will the troubleshooting procedure be
implemented?

To Step 2

Troubleshooting
procedure

2

Turn off the ignition switch, unfix
Terminal B of control solenoid valve and
turn on the ignition switch but do not turn
on the engine, measure if there is a 12V
power supply to the fuse.

To Step 4

To Step 3

3

Check if the circuit between the fuse and
the control solenoid valve suffers any of
the following:
Ground fault (Ω stage)
Open circuit (Ω stage)
Short circuit with the power source
(anode): (voltage stage)

Confirm
repair

4

Check if the resistance of the solenoid
valve is 5-50 Ω.

To Step 5

To Step 6

5

Turn off the ignition switch, unfix the
ECM terminal and check if the circuit
between the ECM and the control
solenoid valve suffers any of the
following:
Ground fault (Ω stage)
Open circuit (Ω stage)
Short circuit with the power source
(anode): (voltage stage)

Confirm
repair

To Step 7

6

Replace the control solenoid valve and
confirm the repair.

7

Replace the engine control module and
confirm the repair.

Thirteen. Troubleshooting code – water tank low-speed fan relay

1. Troubleshooting code setup conditions and emergency scheme
P0480 Short circuit between water tank
low-speed fan relay drive circuit and the
power source anode

P0480 Open circuit of water tank low-speed
fan relay drive circuit or its ground fault

Ju

dg

m

en

t

co

nd

iti

on

s

• Duration > 3s

Ju

dg

m

en

t

co

nd

iti

on

s

- Duration > 3s

E

m

er

ge

nc

y s

ch

em

e

• Turn on the fault indicator light

until the fault is eliminated

• Nil
• The fan does not work until the

water temperature rises to 98 ℃.
Then the high-speed fan is
started.

E

m

er

ge

nc

y s

ch

em

e

• Turn on the fault indicator light

until the fault is eliminated

• Nil
• The fan does not work (open

circuit) until the water
temperature rises to 98 ℃. Then
the high-speed fan is started.

• The fan works as usual (ground

fault)

2. Relevant computer terminals and measurement

Wiring terminal

ECM

Low-speed fan
relay

Normal measurement signal

Storage battery

\

See electrical
system
description

12V

Relay drive

01

See electrical
system
description

In operation = 0V
Out of operation = 12V

3. Troubleshooting procedure

Step Description

Yes

No

1

Will the troubleshooting procedure be
implemented?

To Step 2

Troubleshooting
procedure

2

Check and make sure that the fuse is not
damaged. Unfix the fittings for water tank
fan motor relay and the ECM; turn on the
ignition switch and measure if the voltage
between the ECM Terminal 1 and the
ground is higher than 1.0V.

To Step
11

To Step 3

3

Measure if the resistance of the water tank
fan relay coil is within the range of 50-80
Ω

.

To Step 4

To Step 12

4

Check if there is any broken fuse.

To Step
13

To Step 5

5

Measure if the voltages between relay
Terminal 85, 86 and the ground are higher
than 10V.

To Step 6

To Step 14

6

Measure if the resistance between ECM
Terminal 1 and Terminal 85 of the fan
relay is within the range of 0-2 Ω

To Step 7

To Step 15

7

Check if the fuse of the engine fault
indicator light is broken.

To Step
16

To Step 8

8

Check if the circuit between the engine
fault indicator light and the fuse suffers
any open circuit or ground fault.

To Step
17

To Step 9

9

Check if the circuit between the engine
fault indicator light and the ECM suffers
any open circuit or ground fault.

To Step
18

To Step 10

10

Turn on the ignition switch, ground ECM
Terminal 1 and see if the engine fault
indicator light is on or not.

To Step
19

To Step 11

11

Repair the short circuit to the power
source.

12

Replace the fan relay.

13

Repair the open circuit.

14

Repair the ground fault.

15

Repair the open circuit.

16

Replace the fuse on the circuit of engine
fault indicator light.

17

Repair the open circuit or ground fault of
the circuit between engine fault indicator
light and the fuse.

18

Repair the open circuit or ground fault of
the circuit between engine fault indicator
light and the ECM.

19

Replace the engine control module
(ECM).

Fourteen. Troubleshooting code – water tank high-speed relay

1. Troubleshooting code setup conditions and emergency scheme
P0481 Short circuit between water tank
high-speed fan relay drive circuit and the
power source anode

P0481 Open circuit of water tank high-
speed fan relay drive circuit or its ground
fault

Ju

dg

m

en

t

co

nd

iti

on

s

• Duration > 3s

Ju

dg

m

en

t

co

nd

iti

on

s

• Duration > 3s

E

m

er

ge

nc

y

sc

he

m

e

• Turn on the fault indicator light

until the fault is eliminated

• Nil

E

m

er

ge

nc

y

sc

he

m

e

• Turn on the fault indicator light

until the fault is eliminated

• Nil

• The fan works as usual (ground

fault)

2. Relevant computer terminals and measurement

Wiring terminal

ECM

High-speed fan
relay

Normal measurement signal

Storage battery

\

See electrical
system
description

12V

Relay drive

08

See electrical
system
description

In operation = 0V
Out of operation = 12V

3. Troubleshooting procedure

Step Description

Yes

No

1

Will the troubleshooting procedure be
implemented?

To Step 2

Troubleshooting
procedure

2

Check and make sure that the fuse is not
damaged. Unfix the fittings for water tank
fan motor relay and the ECM; turn on the
ignition switch and measure if the voltage
between the ECM Terminal 8 and the
ground is higher than 1.0V.

To Step
11

To Step 3

3

Measure if the resistance of the water tank
fan relay coil is within the range of 50-80
Ω

.

To Step 4

To Step 12

4

Check if there is any broken fuse.

To Step
13

To Step 5

5

Measure if the voltages between relay
Terminal 85, 86 and the ground are higher
than 10V.

To Step 6

To Step 14

6

Measure if the resistance between ECM
Terminal 8 and Terminal 85 of the fan
relay is within the range of 0-2 Ω

To Step 7

To Step 15

7

Check if the fuse of the engine fault
indicator light is broken.

To Step
16

To Step 8

8

Check if the circuit between the engine
fault indicator light and the fuse suffers
any open circuit or ground fault.

To Step
17

To Step 9

9

Check if the circuit between the engine
fault indicator light and the ECM suffers
any open circuit or ground fault.

To Step
18

To Step 10

10

Turn on the ignition switch, ground ECM
Terminal 8 and see if the engine fault
indicator light is on or not.

To Step
19

To Step 11