Chery A15. Manual — part 265

5

Turn off the ignition switch and unfix the
spray nozzle fittings.
Measure if the resistance of each spray
nozzle is 17 Ω with an ohmmeter (Figure
18-27)

To Step 6

To Step 7

6

Connect an ohmmeter to each cylinder
spray nozzle fitting, ground and measure
with an ohmmeter if the resistance
between each spray nozzle and the ground
circuit is higher than 10000 Ω.

To Step 8

To Step 7

7

Replace the spray nozzle
Confirm the repair

8

Replace the engine control module and
confirm the repair.

Seven. Troubleshooting code – fuel pump relay
1. Troubleshooting code setup conditions and emergency scheme
P0230 Short circuit between the fuel pump
relay and power source anode

P0230 Open circuit of fuel pump relay or its
short circuit with the ground

Ju

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- Duration > 1.5625s

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on

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- Duration > 1.5625s

E

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• Turn on the fault indicator light

until the fault is eliminated

• Nil

E

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• Turn on the fault indicator light

until the fault is eliminated

• Nil

2. Relevant computer terminals and measurement

Wiring terminal

ECM Pressure/temperature

sensor

Normal measurement signal

System master power source

\ See electrical system

description

12V

Relay drive

09 See electrical system

description

0V (in operation), 12V (out
of operation)

3. Troubleshooting procedure

Step Description

Yes

No

1

Will the troubleshooting procedure be
implemented?

To Step 2

Troubleshooting
procedure

2

Check if the fuel pump relay fuse is
broken.

To Step 9

To Step 3

3

Unfix the fuel pump relay and measure if
the voltage between the fuel pump relay
circuit 30 and the ground circuit is higher
than 10V.

To Step 4

To Step 10

4

Unfix the ECM fittings and measure if the
resistance between Terminal 9 and fuel
pump relay 86 is within the range of 0-2
Ω

To Step 5

To Step 11

5

Measure if the resistance between ECM
Terminal 9 and the ground circuit is
infinite.

To Step 6

To Step 8

6

Measure if the resistance of fuel pump
relay coil is within the range of 80-120 Ω

To Step 7

To Step 12

7

If the faults occur intermittently, fix all
fittings and eliminate the troubleshooting
codes.
Fix the diagnostic instrument and carry
out a road test at a speed of over 5km and
check if the troubleshooting code is
displayed.

To Step 8

Fault is
eliminated

8

Replace the engine control module and
confirm if the repair is completed.

Troubleshooting
procedure

9

Repair the ground fault of the fuel pump
relay fuse and confirm the repair.

10

Repair the open circuit between relay
fuses and confirm the repair.

11

Repair the open circuit between the relay
and the ECM and confirm the repair.

12

Replace the fuel pump relay and confirm
the repair.

Eight. Troubleshooting – knock sensor
1. Troubleshooting code setup conditions and emergency scheme
P0325 Bad connection of knock sensor

Ju

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on

s

• Engine speed > 2000rpm

• MAP > 50kPa
• Duration > 5s

E

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• Turn on the fault indicator light

until the ignition switch is turned
off.

- Use safety ignition advance angle
table

2. Relevant computer terminals and measurement

Wiring terminal

ECM

Oxygen sensor Normal measurement signal

Knock signal:

23

1

0-1V

Sensor signal ground

37

2

0V

3. Troubleshooting procedure

Possible cause

Reference maintenance
scheme

1) Loosened fittings
2) Open circuit of knock signal cable
3) Short circuit of sensor signal ground
4) Short circuit between knock signal circuit and other
circuits
5) Sensor damage
6) Fault of the ECM output control terminal of this signal

1) Fix again and fasten
2) Repair the wire harness
3) Repair the wire harness
4) Repair the wire harness
5) Replace the sensor
6) Replace the ECM

Troubleshooting
code

P0607

Knock control system failure

Emergency control
scheme setup

• Turn on the fault indicator light until the fault is eliminated

• Ignition advance angle will be delayed (safety ignition

advance control is adopted)

Wiring terminal

ECM

Normal measurement signal

ECM

ECM internal fault

\

Judgment conditions

Possible cause

Reference maintenance scheme

-

1) ECM fault

1) Replace the ECM

Nine. Troubleshooting code – crank position sensor
1. Troubleshooting code setup conditions and emergency scheme
P0335 No signal from 58x crank shaft
position sensor

P0335 Wrong signal from 58x crank shaft
position sensor

Ju

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• Start the engine

• No engine speed signal
• MAP is decreased to 2.9509kPa

• System voltage is lowered by

0.8V

• Vehicle speed < 4km/h
• Duration > 2s

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• Engine is running.

• The quantity of teeth detected by

ECM is not 58 for five
continuous cycles

Continued

E

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nc

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• Turn on the fault indicator light

until the fault is eliminated

• Nil
• Engine fails to start up

E

m

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nc

y

sc

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e

• Turn on the fault indicator light

until the fault is eliminated

• Nil

2. Relevant computer terminals and measurement

Wiring terminal

ECM

Oxygen sensor Normal measurement signal

High crank shaft signal

41

A

> 400mV sine wave
(with sensor B)

Low crank shaft signal

33

B

> 400mV sine wave
(with sensor A)

System ground wire

06,21,29,45 C

0V

3. Troubleshooting procedure

Step Description

Yes

No

1

Will the troubleshooting procedure be
implemented?

To Step 2

Troubleshooting
procedure

2

Unfix the crank angle sensor and measure
if the resistance between sensor Terminal
C and the ground circuit is within the
range of 0-2Ω.

To Step 3

To Step 8

3

Turn on the ignition switch but the engine
will not be started.
Measure if the voltage between the sensor
Terminal A and the ground circuit is
within the range of 1.0-1.5V.

To Step 4

To Step 9

4

Turn off the ignition switch and unfix the
ECM fittings.
Measure if the resistance between sensor

To Step 5

To Step 10