Geely EC718, EC718RV, EC715, EC715RV. Manual part — 485
Geely EC718, EC718RV, EC715, EC715RV. Manual part - 485
11.13.7 Diagnostic Information and Procedures
11.13.7.1 Diagnosis Description
Refer to
get familiar with the system functions and operation before start system diagnostics,
so that it will help to determine the correct diagnostic steps, more importantly, it will also help to determine whether the customer
described situation is normal.
11.13.7.2 Visual Inspection
–
Check installed aftermarket equipment that may affect the horn operation.
–
Check the easy to access system components to identify whether there is a significant damage or a potential malfunction.
–
If the two speakers are inoperative, check and repair the power supply or switch ground circuit poor connection or open circuit
before replace the horn.
Warning!
For horn and the clock spring removal and inspection, please strictly abide by the airbag system safety operation. Refer
to "SIR Warning."
11.13.7.3 Horn Switch Contact Adjustment
When horns are intermittent inoperative, or one side of the steering wheel horn push switch is inoperative, it is likely that the horn
contact switch has poor connection. At this time, adjust the driver front airbag horn switch contact.
Warning!
For airbag module removal, please strictly abide by the airbag system safety operation. Refer to "SIR Warning."
Body Electric
Horn
11-453
11.13.7.4 Horn Inoperative
Schematic:
From Battery
Horn Relay
Horn
Switch
Tweeter
Subwoofer
FE11-6200b
Diagnostic Steps:
Step 1
Check the fuse IF24.
IF14
IF2
IF1
IF5
IF7
IF3
IF16
IF27
IF25
IF26
IF28
IF30
IF24
IF20
IF19
IF23
IF18
IF21
IF13
IF12
IF15
IF9
IF10
IF8
F17
F22
M
FE11-6201b
(a)
Check whether the fuse IF24 is blown.
Fuse Rated Current: 10 A
No
11-454
Horn
Body Electric
Yes
Step 2
Check fuse IF24 circuit.
(a)
Check whether there is a short circuit.
(b)
Repair the circuits. Confirm that there are no short circuits.
(c)
Replace with fuses with rated current.
Is horn working properly?
Yes
System normal
No
Step 3
Check the horn switch.
(a)
Press the horn switch.
(b)
At the same time, test continuity between the horn switch
harness connector terminal No.1 and the ground with a
multimeter.
Test Terminal
Test
Conditions
Continuity
Terminal No.1 - Body
Ground
Release
10 kΩ or higher
Terminal No.1 - Body
Ground
Press
Less than 1 Ω
Is the resistance specified value?
Yes
No
Step 4
Adjust the horn switch contacts.
(a)
Adjust the horn switch contacts. Refer to
Is horn working properly?
Yes
System normal
No
Step 5
Check the clock spring.
(a)
Press the horn switch.
(b)
At the same time, test continuity between the clock spring
harness connector IP22 terminal No.4 and the ground with a
multimeter.
Test Terminal
Test
Conditions
Continuity
Terminal 4 - Body Ground
Release
10 kΩ or higher
Body Electric
Horn
11-455
Terminal 4 - Body Ground
Press
Less than 1 Ω
Is the resistance specified value?
Yes
No
Step 6
Repair clock spring open circuit.
(a)
Repair the open circuit between the clock spring harness
connector IP22 terminal No.4 and the horn switch harness
connector terminal No.1.
(b)
If necessary, replace the clock spring.
Is horn working properly?
Yes
System normal
No
Step 7
Check the horn relay.
1 2
3
8
7
6
5
4
To I/P Fuse Block 3 Harness
Connector IP10
FE11-6202b
(a)
Press the horn switch.
(b)
Measure the I/P fuse block wiring harness connector IP10
terminal No.8 voltage with a multimeter.
Standard Voltage: 11-14 V
Yes
No
Step 8
Replace the I/P fuse block.
(a)
Check whether there is a short circuit.
(b)
Repair the circuits. Confirm that there are no short circuits.
(c)
Replace the I/P fuse block.
Is horn working properly?
Yes
System normal
No
Step 9
Check the horn power supply circuit.
(a)
Press the horn button.
(b)
Measure the horn harness connector terminal No.1 voltage
with a multimeter.
11-456
Horn
Body Electric
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