3. Schematic:

12

A

B

EO01

57

OCP

EO35

62

MPR

Main Relay

From Battery

Engine 

Control 

Module

Evaporative Canister Solenoid

FE02-5282b

4. Diagnostic Steps:

Note

Before carrying out this diagnosis step, observe the data list on scan tool and analyze the accuracy of the data, as
these will help with quick diagnosis.

Step 1

Use scan tool for canister solenoid valve active testing.

(a)

Connect scan tool to the "Data Link Connector".

(b)

Disconnect the Canister solenoid valve to the Canister
vacuum tubes.

(c)

Start engine and turn on the scan tool.

(d)

Select the following menu: "Engine"/"Action Test"/"Canister
Solenoid Valve"

(e)

Use scan tool to enable the use of "Canister Control Valve".
Place a finger over the vacuum port solenoid valve and check
whether there is suction.

Yes

Intermittent Fault. Refer to 

2.2.7.3

 

Intermittent

Fault Check

.

No

Step 2

Measure canister solenoid valve resistance.

Engine

Control System JL4G15-D

2-743

A

B

Evaporative Canister Solenoid

FE02-5283b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect Canister solenoid valve harness connector
EO24.

(c)

Measure resistance between the Canister solenoid valve two
terminals.

Standard Resistance: 19-22 Ω at 20°C(68 ºF)

(d)

Connect canister solenoid valve harness connector EN24.

Is the value specified value?

No

Replace the canister solenoid valve. Refer to

2.4.7.3

 

Canister Solenoid Valve

Replacement

.

Yes

Step 3

Measure canister solenoid valve working power supply.

FE02-5284b

A

B

Evaporative Canister Solenoid Harness 
Connector EO24

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect Canister solenoid valve harness connector
EN24.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure voltage between Canister solenoid valve wiring
harness connector EN24 terminal A and a reliable ground.

Standard Voltage: 11-14 V

(e)

Connect canister solenoid valve harness connector EN24.

Is the value specified value?

No

Check whether there is an open circuit or a
circuit short to ground between solenoid valve
wiring harness connector EN24 terminal A
and main relay terminal No.3. Repair the
faulty part. Go to step 7

Yes

Step 4

Check canister solenoid valve control circuit.

2-744

Control System JL4G15-D

Engine

1

17

33

53

54

55

56

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

57

A

B

Evaporative Canister Solenoid Harness 
Connector EO24

ECM Harness Connector EO01

FE02-5285b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect Canister solenoid valve harness connector
EO24.

(c)

Disconnect ECM harness connector EO01.

(d)

Measure resistance between Canister solenoid valve wiring
harness connector EN24 terminal B and ECM harness
connector EN01 terminal No.57. Check whether the circuit is
open.

(e)

Measure resistance between Canister solenoid valve wiring
harness connector EN24 terminal B and a reliable ground.
Check whether the circuit is short to ground.

(f)

Measure voltage between Canister solenoid valve wiring
harness connector EN24 terminal B and a reliable ground.
Check whether the circuit is short to power supply.

Test Items

Standard

Value

Resistance Between EN24 (B) and EN01 (57)

Less than 1 Ω

Resistance Between EN24 (B) and A Reliable
Ground

10 kΩ or

higher

Voltage Between EN24 (B) and A Reliable
Ground

0 V

Are the values specified values?

No

Repair or replace the wiring harness
connectors. Go to step 7

Yes

Step 5

Check ECM power supply circuit.

(a)

Check whether ECM power supply circuit is normal.

(b)

Check whether ECM ground circuit is normal.

No

Repair the faulty part.

Yes

Step 6

Replace ECM.

(a)

Carry out crankshaft self learn after ECM replacement. Refer
to 

2.12.7.11

 

Crankshaft Position Sensor (CKP) Learn

.

Next

Step 7

Use scan tool to confirm whether the DTC code is stored again.

(a)

Connect scan tool to the datalink connector.

(b)

Turn the ignition switch to "ON" position.

(c)

Clear DTC code.

(d)

Start and run the engine at idle speed to warm up the engine
for at least 5 min.

Engine

Control System JL4G15-D

2-745

(e)

Read control system DTC code again to confirm that the
system has no DTC code.

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

.

2.12.7.40 DTC P0480 P0481

1. DTC Descriptor:

DTC

P0480

Low-Speed Fan Malfunction

DTC

P0481

High-Speed Fan Malfunction

High or low speed cooling fan relay coil power is provided by ECM controlled main relay. ECM controls the relay via ECM harness
connector EO36 terminal No.66 and 67. 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

Under idle operating condition, when
the fan is working. The fan control is
short to power supply, DTC code set.

1. Relay Circuit

2. Relay

3. ECM

4. Cooling Fan

P0481

Hardware Circuit Checks

Under idle operating condition, when
the fan is working. The fan control is
short to power supply, DTC code set.

3. Schematic:

Refer to 

2.12.6.1

 

Schematic

.

4. Diagnostic Steps:

Refer to 

2.18.3.1

 

Cooling Fan Circuit Diagnosis

5. Repair Instructions:

Replace the cooling fan. Refer to 

2.8.8.3

 

Cooling Fan Replacement

.

2.12.7.41 DTC P0502

1. DTC Descriptor:

DTC

P0502

Vehicle Speed Sensor No Signal

2-746

Control System JL4G15-D

Engine