Geely Emgrand X7. Manual part — 139
Geely Emgrand X7. Manual part - 139
2.8.7.7 Cooling Fan always Runs at Low Speed
Note: Before carry out this diagnostic procedures, please refer to the2.8.7.2 Cooling Fan Circuit
Diagnosis, which will facilitate the Diagnostic.
1
Use the “Action Test” of fault diagnosis tester to drive the fan high-speed. Is
low-speed relay 2 working?
Is High- or Low-speed relay 2 working?
2
Inspect the grounding circuit between the socket #87 of the cooling fan’s high-speed
and low-speed relay 2 and the vehicle body.
(a) Rotated ignition switch to "OFF"
position .
(b) Dismantle the high- or low-speed
relay 2.
(c) Measure the grounding resistance
between the relay 2 socket #87
and the body with multimeter.
Standard Resistance: Less than 1 Ω
Confirm whether the resistance is
normal.
NL11-2264b
ER03
8 5
86
8 7
30
3 0
87
8 6
8 5
ER05
3 0
8 7
86
85
ER06
30
87
87 a
8 6
8 5
ER11
ER08
ER
09
8 5
8 6
87
3 0
4
ER10
2
1
5
3
4
2
1
5
3
4
2
1
5
3
ER04
4
ER02
2
1
5
3
4
2
1
5
3
ER01
ER07
4
2
1
5
3
1
2
3
4
11
12
13
14
15
16
5
6
7
8
9
10
EF0
8
EF0
7
EF2
7
EF2
6
EF2
2
EF2
9
EF
0
3
EF
0
6
EF
0
9
EF2
5
EF1
7
EF1
6
EF1
5
EF
3
5
EF2
1
EF1
4
EF
01
EF
02
EF
04
EF
10
EF
1
1
EF1
8
EF2
4
87
3
Check the open circuit fault at the grounding with the vehicle body of the socket 87 of
the cooling fan’s high- and low-speed relay 2.
4
Inspect high-speed or low-speed relay 2 coil circuit.
(a) Rotated ignition switch to "OFF" position .
(b) Dismantle the cooling fan high- or low-speed relay 2.
(c) Rotated ignition switch to "ON" position .
(d) Connect fault diagnosis tester to the diagnostic interface.
Yes
Go to step 6
No
No
Go to step 4
Yes
555
(e) Select in sequence: Engine/Action Test/Fan High Speed.
(f) Measure the voltage between the #85 and #86 sockets of the high-speed relay with
multimeter.
(e) Standard Voltage: 11-14 V
Confirm if the voltage conforms to standard value.
5
Repair the open circuit fault of the fuse relay box in the engine compartment and
replace it if necessary.
6
Use the “Action Test” of fault diagnosis tester to drive the fan low-speed.
Is the low-speed relay working?
7
Inspect the high-speed and low-speed relay 1 socket No.30 input power supply.
(a) Rotated ignition switch to "OFF" position .
(b) Dismantle the cooling fan high- or low-speed relay 1.
(c) Measure voltage between high- or low-speed cooling fan relay 1 socket No.30 and a reliable
ground.
Standard Voltage: 11-14 V
Confirm if the voltage conforms to standard value.
8
Inspect high-speed or low-speed cooling fan relay 1 and cooling fan harness connector
CA09 wiring harnesses.
(a) Rotated ignition switch to "OFF" position .
(b) Dismantle the cooling fan high- or low-speed relay 1.
(c) Disconnect cooling fan wiring harness connector CA09.
(d) Test continuity between high-speed or low-speed cooling fan relay 1 terminal No.87 and
cooling fan wiring harness connector CA09 terminal No.1.
(e) Measure resistance between high-speed cooling fan relay 1 terminal No.87 and a reliable
ground. Inspect whether the circuit is short to ground.
No
Inspect and repair the faulty locations and replace
the underhood fuse relay box if necessary.
Yes
Yes
Go to step 11
No
Yes
Replace high- or low-speed relay 2
No
556
Standard Value
Test Items
Specified Value
High or low-Speed relay 1(87)-CA09(1)
Less than 1 Ω
Resistance High- or Low-Speed Between Relay
1 (87) and A Reliable Ground
10 kΩ or higher
Confirm whether the resistance conforms to standard value.
9
Inspect the resistance between the terminal 2 of the harness connector CA09 of the
cooling fan 1 and the socket 30 of the cooling fan’s high- or low-speed relay 2.
(a) Rotated ignition switch to "OFF"
position .
(b) Disconnect cooling fan 1 wiring
harness connector CA09.
(c) Dismantle the high- or low-speed
cooling fan relay 2.
(d) Use the multimeter to check the
resistance between the terminal 2
of the harness connector CA09 of
the cooling fan 1 and the socket
30 of the cooling fan’s
high-speed or low-speed relay 2.
Standard Resistance: Less than 1 Ω
NL02-2255b
1
2
CA09 冷却风扇电机1线束连接器
2
Confirm whether the resistance conforms to standard value.
10
Replace Fan Motor 1
11
Inspect High- or Low-speed relay 1 coil power supply.
(a) Rotated ignition switch to "OFF" position .
(b) Dismantle the fan high- or low-speed relay 1.
(c) Rotated ignition switch to "ON" position .
No
Repair the circuit fault between the terminal 2 of the
harness connector CA09 of the cooling fan 1 and the socket
30 of the cooling fan’s high- or low-speed relay 2.
Yes
No
Inspect and repair the faulty locations between the
high-speed or low-speed relay 1 terminal No.87 and the
cooling fan wiring harness connector CA09 terminal No.1.
Yes
CA09cooling fan motor 1harness
connector
557
(d) Measure the effective grounding voltage between High- or Low-speed relay 1 socket 85 and
the body with a multimeter.
Standard Voltage: 11-14 V
Confirm if the voltage conforms to standard value.
12
Measure ECM harness connector EM01 terminal No.65 voltage.
(a) Rotated ignition switch to "ON" position .
(b) Disconnect ECM harness connector EM01.
(c) Dismantle the high- or low-speed cooling fan relay 1.
(d) Test the continuity between the cooling fan high- or low-speed relay 1 terminal No.86 and
EM01 terminal No.65.
Standard Resistance: Less than 1 Ω
Confirm whether the measured value conforms to the standard value.
13
Inspect ECM working circuit.
(a) Check if ECM power circuit is normal.
(b) Inspect if ECM ground is normal.
14 Replace
ECM
15 Troubleshooting
Next
No
Repair the faulty part.
Yes
No
Repair the open circuit fault between the high- or
low-speed relay 1 terminal #86 and EM01 terminal #65.
Yes
No
Replace high- or low-speed relay 1 and repair the
underhood fuse relay box. Replace it if necessary.
Yes
558
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст