No

Intermittent Fault. Refer to 

2.2.7.3

 

Intermittent

Fault Check

Yes

Step 8

Diagnostic completed.

5. Repair Instructions:

Replace EVAP solenoid valve. Refer to 

2.4.7.3

 

Canister Solenoid Valve Replacement

.

2.2.7.34 DTC P0480 P0481 P0691 P0692 P0693 P0694

1. DTC Descriptor:

DTC

P0480

Cooling Fan Relay Control Circuit Open (Low Speed)

DTC

P0482

Cooling Fan Relay Control Circuit Malfunction (High Speed)

DTC

P0691

Cooling Fan Relay Control Circuit Short to Ground (Low Speed)

DTC

P0692

Cooling Fan Relay Control Circuit Short to Power Supply (Low Speed)

DTC

P0693

Cooling Fan Relay Control Circuit Short to Ground (High Speed)

DTC

P0694

Cooling Fan Relay Control Circuit Short to Power Supply (High Speed)

High or low speed cooling fan relay coil power is provided by ECM controlled main relay. ECM controls the relay via ECM harness
connector EN01 terminal No.52 and 62. ECM has an internal driver circuit that controls the relay coil ground. Drive circuit is equipped
with a feedback circuit to ECM. ECM monitors the feedback voltage control circuit to determine whether the control circuit is open,
short to ground or short to ground.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection Strategy

Conditions For Setting The DTC

(Control Strategy)

Fault Locations

P0480

Hardware Circuit Checks

Circuit Open.

1. Relay Circuit

2. Relay

3. ECM

P0481

Hardware Circuit Checks

Circuit Open.

P0691

Hardware Circuit Checks

Circuit Short to Ground.

P0692

Hardware Circuit Checks

Circuit Short to Power Supply.

P0693

Hardware Circuit Checks

Circuit Short to Ground.

P0694

Hardware Circuit Checks

Circuit Short to Power Supply.

3. Schematic:

Refer to 

2.8.6.1

 

Schematic

.

4. Diagnostic Steps:

Refer to 

2.8.7.2

 

Cooling Fan Circuit Diagnosis

.

Engine

Control System JL4G18-D

2-175

5. Repair Instructions:

Replace the cooling fan. Refer to 

2.8.8.3

 

Cooling Fan Replacement

.

2.2.7.35 DTC P0501

1. DTC Descriptor:

DTC

P0501

Unreasonable Vehicle Speed Sensor Signal

The vehicle speed signal is used to monitor the vehicle speed. The vehicle speed signal is one of the fuel control reference signals
during an urgent deceleration. The vehicle speed sensor working voltage is provided by The Main Relay which is controlled by ECM
via ECM harness connector EN01 terminal No.57. The vehicle speed sensor signal is sent to the instrument panel used for the
vehicle speed display.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection Strategy

Conditions For Setting The DTC (Control Strategy)

Fault Locations

P0501

Low Limit for Stopping Fuel
Supply

1. The vehicle speed is less than 5 km/h.

2. Stopping Fuel Supply Enabled.

3. Engine coolant temperature is higher than 64.5°C.

(148.1 ºF) .

4. Engine speed is greater than 1,520 rpm and less

than 4,000 rpm.

1. Vehicle Speed Sensor

Circuit

2. Vehicle Speed Sensor

3. ECM

2-176

Control System JL4G18-D

Engine

3. Schematic:

12

From Battery

Main Relay

Vehicle 

Speed 

Sensor

To Meter

Engine 

Control 

Module

FE02-5097b

4. Diagnostic Steps:

Step 1

Road test the vehicle. Is the vehicle speed meter display working properly?

(a)

If the instrument panel displays the vehicle speed as per
normal, the vehicle speed sensor is working correctly.

(b)

If the instrument panel displays the vehicle speed
abnormally, the vehicle speed sensor or the circuit may be
faulty.

No

Go to step 3

Yes

Step 2

Check the vehicle speed signal circuit.

Engine

Control System JL4G18-D

2-177

1

3

5

7

8

6

4

2

9

10

11

12

13

23

24

25

26

27

28

29

30

37

51

52

53

54

55

56

57

58

59

60

61

62

63

64

38

39

40

41

42

43

44

45

46

47

48

49

50

31

32

33

34

35

36

14

15

16

17

18

19

20

21

22

ECM Harness Connector EN01

Vehicle Speed Sensor Harness Connector EN21

1

2

3

FE02-5098b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect speed sensor wiring harness connector EN21.

(c)

Disconnect ECM harness connector EN01.

(d)

Measure resistance between the vehicle speed sensor
harness connector EN21 terminal No.3 and ECM harness
connector EN01 terminal No.57. Check whether the circuit is
open.

(e)

Measure resistance between the vehicle speed sensor
harness connector EN21 terminal No.3 and a reliable ground.
Check whether the circuit is short to ground.

(f)

Measure voltage between the vehicle speed sensor harness
connector EN21 terminal No.3 and power supply. Check
whether the circuit is short to power supply.

Test Items

Standard Value

Resistance Between EN21 (2) and EN01 (57)

Less than 1 Ω

Resistance Between EN21 (2) and a Reliable
Ground

10 kΩ or higher

Voltage Between EN21 (2) and a Reliable
Ground

0 V

Are the values specified values?

No

Repair or replace the wiring harness
connector. Go to step 8

Yes

Go to step 6

Step 3

Check the vehicle speed sensor power supply circuit.

Vehicle Speed Sensor Harness Connector EN21

1

2

3

FE02-5099

b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect speed sensor wiring harness connector EN21.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure voltage between vehicle speed sensor harness
connector EN21 terminal No.1 and a reliable ground.

Standard Voltage: 11-14 V

(e)

Connect vehicle speed sensor harness connector EN21.

Is the value specified value?

No

Check whether there is a short circuit between
the vehicle speed sensor terminal No.3 and
the main relay terminal No.87. Repair the
faulty part.

Yes

Step 4

Check the vehicle speed sensor ground circuit.

2-178

Control System JL4G18-D

Engine