Chery A15. Manual — part 264

throttle position sensor fittings and turn on
the ignition switch. Check if the throttle
opening value displayed on ADC2000
diagnostic instrument is 0% (0.0 - 0.25V).

4

Check the throttle position sensor signal
circuit;
Check if the circuit between the sensor
and the ECM suffers the following:
• Short circuit with the power source

Confirm repair

To Step 11

5

Check the sensor reference voltage circuit:
Check if the circuit between the sensor
and the ECM suffers the following:
Open circuit (Ω stage)
Ground fault (Ω stage)
Short circuit with the power source

Confirm repair

To Step 6

6

Check the sensor input signal circuit:
Check if the circuit between the sensor
and the ECM suffers the following:
Open circuit (Ω stage)
Ground fault (Ω stage)
Short circuit with the power source
(anode): (voltage stage)

Confirm repair

To Step 7

7

Check the sensor ground circuit:
Check if the circuit between the sensor
and the ECM suffers the following:
Open circuit (Ω stage)
Ground fault (Ω stage)
Short circuit with the power source
(anode): (voltage stage)

Confirm repair

To Step 8

8

Turn off the ignition switch
Create a short circuit between the sensor
signal circuit and the 5V reference voltage
Turn on the ignition switch
Check if the throttle opening value
displayed on ADC2000 diagnostic
instrument is 100% (about 5V).

To Step 9

To Step 11

9

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

To Step 10

To Step 11

10

Replace the throttle position sensor
Confirm the repair

11

Replace the engine control unit (ECM)
Confirm the repair

Five. Troubleshooting code – oxygen sensor
1. Troubleshooting code setup conditions and emergency scheme
P0130 No signal from oxygen sensor

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• 360.24 mV < oxygen sensor

signal < 538.19 mV

• Engine running duration > 40s
• No TPS and MAP fault
• Cooling fluid temperature > 72℃
• Enter closed-loop fuel control

status

• TPS > 10.156%

• Duration > 15s

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• Turn on the fault indicator light

until the fault is eliminated

• No closed-loop control is

applicable for AFR

P0135 Short circuit between oxygen
sensor heating circuit and the power
source anode

P0135 Short circuit between oxygen sensor
heating circuit and the ground or its open
circuit

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- Duration > 1s

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- No master relay fault
- Duration > 1s

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• Turn on the fault indicator light

until the fault is eliminated and
turn off the ignition switch

• System closed-loop working time

is delayed

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• Turn on the fault indicator light

until the fault is eliminated and
turn off the ignition switch

• System closed-loop working time

is delayed

P0170 High AFR for too long subject to
oxygen sensor instruction

P0170 Low AFR for too long subject to
oxygen sensor instruction

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• Oxygen sensor signal

>998.26mV

• Engine running duration > 40s
• No TPS and MAP fault
• Cooling fluid temperature > 72℃
• Enter closed-loop fuel control

status

• TPS > 10.156%

• Duration > 15s

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• Oxygen sensor signal < 52.083

mV

• Engine running duration > 40s
• No TPS and MAP fault
• Cooling fluid temperature > 72℃
• Enter closed-loop fuel control

status

• TPS > 10.156%

• Duration > 15s

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• Turn on the fault indicator light

until the fault is eliminated

• No closed-loop control

applicable for AFR

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• Turn on the fault indicator light

until the fault is eliminated and
turn off the ignition switch

• System closed-loop working time

is delayed

2. Relevant computer terminals and measurement

Wiring terminal

ECM

Oxygen sensor

Normal measurement signal

System master power
source

\ C

12V

Heating drive

\

D

0V

High oxygen sensor
signal

31 B

0～1000mV fluctuation

Low oxygen sensor
siganl

55 A

0V

3. Troubleshooting procedure

Step Description

Yes

No

1

Will the troubleshooting procedure be
implemented?

To Step 2

Troubleshooting
procedure

2

Is the oxygen sensor input signal value
displayed on ADC2000 diagnostic
instrument within the range of 0mV-
1000mV when the engine is heated up to
the normal working temperature (closed-
loop control)?

Fault is
eliminated

To Step 3

3

Turn off the ignition switch, disconnect
the oxygen sensor fittings and check if the
sensor wires are securely fastened to the
sensor.

To Step 4

To Step 6

4

Check if the two wires connected with the
oxygen sensor suffer any of the following:
Open circuit (Ω stage)
Ground fault (Ω stage)
Short circuit with the power source
(voltage stage)

To Step 7

To Step 5

5

Cool down the engine and the sensor to
about 20℃ and measure if the resistance
between Terminals A and B is higher than
10KΩ.

Fault is
eliminated

To Step 6

6

Replace the oxygen sensor and confirm
the repair.

7

Repair the open circuit or short circuit and
confirm the repair.

Six. Troubleshooting code – spray nozzle
1. Troubleshooting code setup conditions and emergency scheme
P0201 Spray nozzle A (first cylinder) circuit fault
P0202 Spray nozzle B (Third cylinder) circuit fault
P0203 Spray nozzle C (Fourth cylinder) circuit fault
P0204 Spray nozzle D (Second cylinder) circuit fault

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- Turn on the ignition switch
- Fuel pump is working normally
- Ignition voltage > 10V

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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

Oxygen sensor Normal measurement signal

System master power source

\

A

12V

Spray nozzle A (first cylinder)

70

B

0-12V similar square wave

Spray nozzle B (Third cylinder)

61

B

0-12V similar square wave

Spray nozzle C (Fourth cylinder)

60

B

0-12V similar square wave

Spray nozzle D (Second
cylinder)

49

B

0-12V similar square wave

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 the
spray nozzle fittings, connect one
voltmeter between the first cylinder spray
nozzle Terminal 1 and the ground circuit,
start the engine or operate ADC2000
diagnostic instrument to actuate the fuel
pump relay, see if the voltage of spray
nozzle Terminal 1 is 12V.
Repeat Step 2 and 3 to check other spray
nozzles.

To Step 4

To Step 3

3

Repair the ground fault and open circuit of
fuel pump relays and spray nozzles

Confirm
repair

4

Turn off the ignition switch and check if
circuits between the spray nozzle and
ECM 49, 60, 61 and 70 suffer any of the
following:
Open circuit (Ω stage)
Ground fault (Ω stage)
Short circuit with the power source
(voltage stage)

Confirm
repair

To Step 5