Mitsubishi Outlander (2003+). Manual — part 553
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-27
Step 3. Check the wiring harness between C-26
A/C-ECU connector (terminals 21 and 24) and
C-315 mode selection damper control motor and
potentiometer connector (terminals 3 and 1).
NOTE: Prior to the wiring harness inspection, check
intermediate connector C-36, and repair if necessary.
•
Check the motor activating lines for open or short
circuit.
Q: Is the check result normal?
YES :
Replace the automatic air conditioner
control panel (A/C-ECU).
NO :
Repair the wiring harness.
AC301398
Connectors: C-26, C-36 <LHD>
C-26
C-36
BI
C-36
Harness side
1 2
4
3
12
11
10
9
8
7
6
13
5
29
21
35
27
24
323130
22
23
33
25
34
26
36
28
C-26(B)
AC308736
Connectors: C-26, C-36 <RHD>
C-26
C-36
AL
C-36
Harness side
1 2
4
3
12
11
10
9
8
7
6
13
5
29
21
35
27
24
323130
22
23
33
25
34
26
36
28
C-26(B)
AC309435
Connector: C-315 <LHD>
AE
Harness side
2
6 5
1
3
4
AC308739
Connector: C-315 <RHD>
AF
Harness side
2
6 5
1
3
4
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-28
TROUBLE SYMPTOM CHART
M1554005000214
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: Communication with the MUT-II/III is not possible.
Symptom
Inspection procedure
number
Reference page
Communication with the MUT-II is not possible.
1
The air conditioner does not work at all.
2
<4G63>,
<4G69>
A/C outlet air temperature cannot be set.
3
The blower does not work.
4
The blower air volume cannot be changed.
5
When sunlight intensity changes, air outlet temperature
does not change.
6
The A/C indicator flashes.
7
The inside/outside air changeover is impossible.
8
Defogger function does not operate.
9
Malfunction of the A/C-ECU power supply system.
10
A/C-ECU
DIAGNOSIS
CONNECTOR
FRONT SIDE
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
Data Link Connector Circuit
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-29
COMMENTS ON TROUBLE SYMPTOM
If communication with all other systems is not
possible, there is a high possibility that there is a
malfunction of the diagnosis line. If only the A/C
system can not communicate with the MUT-II/III, the
diagnosis line between the A/C-ECU and the
diagnosis connector may be defective.
Possible causes
•
Damaged the wiring harness or connectors
•
Malfunction of the automatic air conditioner
control panel (A/C-ECU)
DIAGNOSIS
Step 1. Check the communication with other
systems.
Q: Is the communication with the other systems
possible using the MUT-II/III?
YES :
Go to Step 2.
NO :
Check the diagnosis line using the
MUT-II/III, and repair if necessary.
STEP 2. Check operations of the air conditioner,
defogger and outside/inside air selection damper
control motor.
Q: Does the air conditioner, defogger or
outside/inside air selection damper control motor
operate?
YES :
Go to Step 3.
NO :
Refer to Inspection procedure 10
"Malfunction of the A/C-ECU power supply
system
Step 3. Connector check: C-27 A/C-ECU
connector and C-24 diagnosis connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the connector.
AC301395AV
C-24(B)
1
9 10
2
4
12
11
3
13
5
7
15
14
6
16
8
Connector: C-24 <LHD>
Harness side
AC308769
AB
C-24(B)
1
9 10
2
4
12
11
3
13
5
7
15
14
6
16
8
Connector: C-24
Harness side
<RHD>
AC301397
Connector: C-27
<LHD>
AX
C-27(B)
Harness side
8
2
10 9
1
5
3
4
6
7
20191817161514131211
AC308735
Connector: C-27 <RHD>
AY
C-27(B)
Harness side
8
2
10 9
1
5
3
4
6
7
20191817161514131211
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-30
Step 4. Check the wiring harness between C-27
A/C-ECU connector (terminal 17 and 18) and C-24
diagnosis connector (terminal 11 and 1).
•
Check the communication lines for open or short
circuit.
Q: Is the check result normal?
YES :
Replace the automatic air conditioner
control panel (A/C-ECU).
NO :
Repair the wiring harness.
AC301395AV
C-24(B)
1
9 10
2
4
12
11
3
13
5
7
15
14
6
16
8
Connector: C-24 <LHD>
Harness side
AC308769
AB
C-24(B)
1
9 10
2
4
12
11
3
13
5
7
15
14
6
16
8
Connector: C-24
Harness side
<RHD>
AC301397
Connector: C-27
<LHD>
AX
C-27(B)
Harness side
8
2
10 9
1
5
3
4
6
7
20191817161514131211
AC308735
Connector: C-27 <RHD>
AY
C-27(B)
Harness side
8
2
10 9
1
5
3
4
6
7
20191817161514131211
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