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 

Ju

dg

m

en

t c

on

dit

io

ns

  

•  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 

E

m

er

ge

nc

y s

ch

em

e  

•  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 

Ju

dg

m

en

t 

co

nd

iti

on

s

- Duration > 1s 

Ju

dg

m

en

t 

co

nd

iti

on

s 

- No master relay fault 
- Duration > 1s 

E

m

er

ge

nc

y 

sc

he

m

e

•  Turn on the fault indicator light 

until the fault is eliminated and 
turn off the ignition switch 

•  System closed-loop working time 

is delayed 

E

m

er

ge

nc

y 

sc

he

m

e 

•  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 

Ju

dg

m

en

t c

on

dit

io

ns

 

•  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 

Ju

dg

m

en

t c

on

dit

io

ns

 

•  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 

E

m

er

ge

nc

y 

sc

he

m

e

•  Turn on the fault indicator light 

until the fault is eliminated  

•  No closed-loop control 

applicable for AFR 

E

m

er

ge

nc

y 

sc

he

m

e 

•  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      

Ju

dg

m

en

t 

co

nd

iti

on

s  

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

E

m

er

ge

nc

y 

sc

he

m

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

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