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