Chery A15. Manual — part 263

Continued
8

Check the sensor’s ground circuit and if
there is any of the following for the circuit
between the sensor and the ECM:
• Ground fault (Ω stage)
• Open circuit (Ω stage)
• Short circuit with the power source

(anode): (Voltage stage)

Confirm
repair

To Step 9

9

Turn on the ignition switch
Measure with a voltmeter if the voltage
between the ground circuit and the
reference voltage is 5V.

To Step 10

To Step 11

10

Replace the air intake manifold absolute
pressure sensor and confirm the repair.

- -

11

Replace the engine control module (ECM)
and confirm the repair.

- -

Two. Troubleshooting code – intake air temperature sensor
1. Troubleshooting code setup conditions and emergency scheme

P0110 Signal from intake air temperature
sensor is too low

P0110 Signal from intake air temperature
sensor is too high

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• Engine running duration > 120s
• MAT < -38.25℃
• Fault duration > 2s

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• Engine running duration > 60s
• MAT > 148.5℃
• Fault duration > 2s

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• Turn on the fault indicator light

until the fault is eliminated

• Intake air temperature equals

cooling liquid temperature but
does not exceed 44.25℃

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• Turn on the fault indicator light

until the fault is eliminated

• Intake air temperature equals

cooling liquid temperature but
does not exceed 44.25℃

2. Relevant computer terminals

Wiring terminal

ECM

Intake air temperature
sensor

Normal measurement signal

Intake air temperature
signal

35 C

0.5～4.5V

Sensor signal ground 28

D

0V

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
Disconnect the EMC plug and check if the
sensor ground circuit suffers any of the
following:
• Open circuit (Ω stage)
• Ground fault (Ω stage)
• Short circuit with the power source

(voltage stage)

Confirm
repair

To Step 3

3

Turn off the ignition switch
Disconnect the EMC plug and check if the
sensor signal circuit suffers any of the
following:
• Open circuit (Ω stage)
• Ground fault (Ω stage)

• Short circuit with the power source

(voltage stage)

Confirm
repair

To Step 3

4

Check if ECM Terminal 27 has a 5V
reference voltage.

To Step 5

To Step 6

5

Replace the intake air temperature sensor
and confirm the repair

6

Replace the ECM and confirm the repair.

Three. Troubleshooting code – cooling fluid temperature sensor
1. Troubleshooting code setup conditions and emergency scheme

P0115 Signal is too low

P0115 Signal is too high

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• Engine running duration > 10s
• CTS < -38.25℃
• Fault duration > 2s

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• Engine running duration > 2s
• CTS > 135℃
• Fault duration > 2s

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• Turn on the fault indicator light

until the fault is eliminated

• Intake air temperature is adopted

at startup and increased to 79.5℃
as time goes on.

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• Turn on the fault indicator light

until the fault is eliminated

• Intake air temperature is adopted

at startup and increased to 79.5℃
as time goes on.

2. Relevant computer terminals

Wiring terminal

ECM

Cooling fluid
temperature sensor

Normal measurement signal

Cooling fluid
temperature signal

34 B

0.5～4.5V

Sensor signal ground 37

A

0V

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
Disconnect the EMC plug and check if the
sensor ground circuit suffers any of the
following:
• Open circuit (Ω stage)
• Ground fault (Ω stage)

• Short circuit with the power source

(voltage stage)

Confirm
repair

To Step 3

3

Turn off the ignition switch
Disconnect the EMC plug and check if the
sensor signal circuit suffers any of the
following:
• Open circuit (Ω stage)
• Ground fault (Ω stage)
• Short circuit with the power source

(voltage stage)

Confirm
repair

To Step 4

4

Check if ECM Terminal 34 has a 5V

To Step 5

To Step 6

reference voltage.

5

Replace the water temperature sensor and
confirm the repair

6

Replace the ECM and confirm the repair.

Four. Troubleshooting code – throttle position sensor

1. Troubleshooting code setup conditions and emergency scheme
P0120 Signal from throttle position sensor
is too high

P0120 Signal from throttle position sensor
is too low

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• Engine is running but the speed

<3000rpm

• No MAP fault and MAP < 70kPa

• Fault duration > 2s

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- Engine running duration > 2s

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• Turn on the fault indicator light

until the fault is eliminated

• At idle speed, set the throttle

position sensor at 0% opening; at
other speeds, the opening
changes with the turning speed.

• Self-reset function of the throttle

position sensor is suspended

• The function of cleaning extra

fuel is suspended

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• Turn on the fault indicator light

until the fault is eliminated

• At idle speed, set the throttle

position sensor at 0% opening; at
other speeds, the opening
changes with the turning speed.

• Self-reset function of the throttle

position sensor is suspended

• The function of cleaning extra

fuel is suspended

2. Relevant computer terminals and measurement

Wiring terminal

ECM

Throttle position
sensor

Normal measurement signal

5V reference voltage 36

A

5V

Throttle position signal 26

C

0.5 – 4.5V

Sensor signal ground 37

B

0V

3. Troubleshooting procedure

Step Description

Yes

No

1

Will the troubleshooting procedure be
implemented?

To Step 2

Troubleshooting
procedure

2

Turn on the ignition switch but the engine
is not started.
Change the throttle opening from 0% to
100% and check if the throttle opening
value displayed on ADC2000 diagnostic
instrument is from 0% (0.25V) to 100%
(4.75V)

Troubleshooting
indication

To Step 3

3

Turn off the ignition switch. Unfix the

To Step 5

To Step 4