Chery A15. Manual - part 268

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)  

 

 
 
 
Fifteen. Troubleshooting code – vehicle speed sensor 
1. Troubleshooting code setup conditions and emergency scheme 
P0500 No signal from the vehicle speed sensor 

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•  Engine is running 

•  Vehicle speed < 2kph 

•  MAP < 25.82Kpa 
•  1200rpm < engine speed < 

5000rpm 

•  Throttle is closed 

•  Duration > 5s 

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•  Turn on the fault indicator light 

until the fault is eliminated  

•  Nil 

•  Restriction on driving may be 

adopted. 

 

 
2. Relevant computer terminals and measurement 

Wiring terminal 

ECM 

Vehicle speed 
sensor 

Normal measurement signal

Sensor signal 

38

 

/ 

0-12V square wave 

 
 
 
3. Troubleshooting procedure 

Step Description 

Yes 

No 

1 

Will the troubleshooting procedure be 
implemented? 

To Step 2 

Troubleshooting 
procedure 

2 

Check if there is open circuit or ground 
fault between ECM Terminal 38 and the 
vehicle speed sensor (Ω stage) 

Confirm 
repair 

To Step 3 

3 

Check if the resistance between the sensor  To Step 4 

Confirm repair 

 

and the ground is within the range of 0-2 
Ω

. 

4 

Turn on the ignition switch and measure if 
the voltage between Terminal A of the 
vehicle speed sensor and the ground is 
within 12V. 

To Step 5 

To Step 7 

5 

Fix all fittings, turn on the ignition switch, 
fix the ADC 2000 diagnostic instrument 
to clear off the troubleshooting code and 
drive the vehicle at a speed of over 5km/h. 
is the troubleshooting code still displayed?

To Step 7 

Fault is 
eliminated 

6 

Replace the vehicle speed sensor and 
confirm the repair.  

 

 

7 

Replace the engine control module and 
confirm the repair.  

 

 

 
 
 
 
Sixteen. Troubleshooting code – idle speed control 
 
1. Troubleshooting code setup conditions and emergency scheme 
P0505 Idle speed control fault 

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•  Engine is running 

•  Water temperature is normal 
•  No TPS and VSS faults 

•  Deviation from target speed > 

180rpm 

•  Duration >15s 

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•  Turn on the fault indicator light 

until the fault is eliminated  

•  Stop idle speed adjustment 
 

 
 
 
2. Relevant computer terminals and measurement 

Wiring terminal 

ECM 

Idle speed 
control valve 

Normal measurement signal

Idle speed valve A – high 

07 

D 

0-12V square wave  
(with idle speed valve C) 

Idle speed valve A – low 

15 

C 

0-12V square wave  
(with idle speed valve D) 

Idle speed valve B – high 

13 

B 

0-12V square wave  
(with idle speed valve A) 

Idle speed valve 

B

 – low 

14 

A 

0-12V square wave  
(with idle speed valve B) 

 
 

 

 
 
 
3. Troubleshooting procedure 

Step Description 

Yes 

No 

1 

Will the troubleshooting procedure be 
implemented? 

To Step 2 

Troubleshooting 
procedure 

2 

Fix the diagnostic instrument and start the 
engine. 
Accelerate and decelerate the idle speed 
with ADC2000 diagnostic instrument and 
see if the engine idle speed changes with 
the control by the diagnostic instrument.  

To Step 4 

To Step 3 

3 

Check if the idle speed bypass hole is 
clean and not clogged.  

To Step 4 

To Step 8 

4 

Check if the idle speed bypass valve 
circuit suffers any of the following:  
•  Loosened terminals 

•  Open circuit 
•  Ground fault and short circuit with the 

power source 

•  Loosened terminal of the control valve 

Confirm 
repair 

To Step 5 

 

5 

Check if the resistance of the idle speed 
bypass valve solenoid is within the range 
of 40-80Ω 

To Step 6 

To Step 9 

6 

Check if the resistances between 
Terminals B and C as well as Terminals A 
and D are infinite.  

To Step 7 

To Step 9 

7 

Check if the ground resistance of the 
terminal is higher than 10,000 Ω 

To Step 
10 

To Step 9 

8 

Clean the idle speed bypass hole with 
compressed air.  
Actuate the “idle speed air control valve” 
with ADC2000 diagnostic instrument and 
slide the valve rod so that the dirt may be 
cleaned by the compressed air.  
Confirm the repair. 

To Step 2 

 

9 

Replace the idle speed control valve 
Confirm the repair 

 

 

10 

Replace the engine control module 
Confirm the repair. 

 

 

 
 
 
 

 

 
 
 
Seventeen. Troubleshooting code – system voltage 
 
1. Troubleshooting code setup conditions and emergency scheme 
P0560 System overvoltage 

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•  Turn on the ignition switch 

•  System voltage > 17.2 V 
•  Duration > 5s 

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•  Turn on the fault indicator light 

until the fault is eliminated  

•  Stop system fuel injection 
 

 
2. Relevant computer terminals and measurement 

Wiring terminal 

ECM 

Ignition switch  Normal measurement signal

Ignition switch 

18 

See electrical 

system 

description 

12V 

 
 
3. Troubleshooting procedure 

Step Description 

Yes 

No 

1 

Will the troubleshooting procedure be 
implemented? 

To Step 2 

Troubleshooting 
procedure 

2 

Fix the diagnostic instrument to display 
the storage battery voltage 
When the engine is running at normal 
working temperature, is the storage 
battery voltage displayed on ADC2000 
diagnostic instrument higher than 15V? 

To Step 2 

Troubleshooting 
procedure 

3 

When the engine is running at normal 
working temperature, is the storage 
battery voltage displayed on the 
diagnostic instrument lower than 15V? 

To Step 5 

Fault eliminated 

4 

Check if the ground voltage of the storage 
battery anode higher than 15V.  

To Step 6 

Fault eliminated 

5 

Run the engine at a speed of 2000rpm, 
turn on the headlight and fully run the fan; 
is the storage battery voltage higher than 
15V? 

To Step 6 

Fault eliminated