Symptoms
Suspected Faulty
Components
Repair Procedure
Blower relay
terminal No.85
has no battery
voltage
1. Fuse IF25 (10 A)
Blown
2. Harness
Malfunction
1. Repair the
harness.
2. Replace the fuse
IF25.
Blower assembly
IP45-2 has no
battery voltage
1. Blower Relay
Malfunction
2. Harness
Malfunction
1. Replace the
blower relay.
2. Repair the
harness.
Blower relay
terminal No.86
poor connection to
ground
1. Harness
Malfunction
2. Ground G3
Malfunction
1. Repair the
harness.
2. Repair ground G3
poor connection.
Blower relay
terminal No. 86
and No. 85
between the
resistance does
not meet the
standard
Blower relay
Malfunction.
Replace the blower
relay.
(b)
Confirm the repair completed.
Is blower working properly
Yes
System normal
No
Step 3
Check the air-conditioning control module terminal IP40-7 voltage.
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
A/C Control Module Harness Connector IP40
FE08-5113b
(a)
Start the engine.
(b)
Adjust the air-conditioning air flow knob on the control panel.
(c)
Measure air-conditioning control module terminal IP40-7
voltage with a multimeter.
(d)
Each air flow speed voltage standard values are as shown.
Air Low
Blower
Blower Terminal Voltage
0
0
0
1
1
4.4 ± 0.3
2
2
5.1 ± 0.3
3
3
6.7 ± 0.3
4
4
8.2 ± 0.3
8-32
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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