Yes
System normal
No
Step 10
Replace the ECM.
(a)
Is the air-conditioning clutch working properly?
Yes
System normal
No
Step 11
Test the air pressure switch terminals CA22-1 working status.
2
3
1
4
A/C Pressure Switch Harness Connector CA22
FE08-5107b
(a)
Start the engine, press the air-conditioning control switch (A /
C switch).
(b)
Connect one end of a test lamp to the battery positive
terminal, the other to the air pressure switch terminal CA22-1.
Is the test lamp lit?
Yes
Replace the of air-conditioning pressure
switch.
No
Step 12
Test the air-conditioning control module terminal IP40-32 working status.
16
32
15
31
14
30
13
29
12
28
11
27
10
26
9
25
8
24
7
23
6
22
5
21
4
20
3
19
2
18
1
17
2
3
1
4
A/C Pressure Switch Harness Connector CA22
A/C Control Module Harness Connector IP40
FE08-5109b
(a)
Start the engine, press the air-conditioning control switch (A /
C switch).
(b)
Connect one end of a test lamp to the battery positive
terminal, the other to the air control module terminal IP40-32.
Is the test lamp lit?
Yes
Repair the open circuit between air-
conditioning control module terminal IP40-32
and air-conditioning Pressure Switch
Terminal CA22-1.
No
Step 13
Check the air-conditioning control module circuit.
8-30
Automatic Air-conditioning
Heating, Ventilation and A/C System
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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