dış MITSUBISHI LANCER 2005 Workshop Manual

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-13
STEP 5. Voltage measurement at the B-114 A/C
compressor connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the "ON" position.(3) Disconnect engine-ECU connector C-123, and
earth terminal 8.
(4) Disconnect engine-A/T-ECU connector C-122,
and earth terminal 20.
(5) Measure the voltage between terminal 1 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 6.
NO : Refer to Inspection procedure 11 "A/C
compressor power supply system P.55-59."
AC303782
Connector: B-114
<4G1-L.H.D.>
AC
Harness side
B-114 (B)
AC303790
Connector: B-114
<4G6-L.H.D.>
AC
Harness side
B-114 (B)
AC303805
Connectors: C-122 , C-123

C-122 (GR)
C-123 (Y)
C-122 Harness side
C-123
AE
AC305159 Connector C-123
(Harness side)AB
AC305161
Connector C-122
(Harness side)
AB
AC301541EW
Connector B-114
(Harness side)
1

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-14
STEP 6. Connector check: C-139 A/C-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO : Repair the connector.
STEP 7. Voltage measurement at C-139 A/C-ECU
connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Turn the blower switch to the "ON" position.
(4) Measure the voltage between terminal 8 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 10.
NO : Go to Step 8.
STEP 8. Connector check: C-109 resistor
connector
Q: Is the check result normal?
YES :
Go to Step 9.
NO : Repair the connector.
STEP 9. Check the wiring harness between C-109
resistor connector terminal No.4 and C-139
A/C-ECU connector terminal No.8.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
AC303802
Connector: C-139

AE
C-139 (B)
Harness side
AC303802
Connector: C-139

AE
C-139 (B)
Harness side
AC301541EX
Connector C-139
(Harness side)
9
1
1574
12
1110
23
13
5
14616
8
AC303804
Connector: C-109

AE
Harness side
AC303804
Connector: C-109

AE
Harness side
AC303802
Connector: C-139

AE
C-139 (B)
Harness side

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-21
COMMENTS ON TROUBLE SYMPTOM
If cool air is not distributed when the A/C switch is on,
the air thermo sensor or the A/C compressor relay
system may be defective.
TROUBLESHOOTING HINTS
•Improper amount of refrigerant
•Malfunction of the air thermo sensor
•Malfunction of the dual pressure switch
•Malfunction of the A/C compressor relay
•Malfunction of the A/C refrigerant temperature
switch
•Malfunction of the magnetic clutch
•Malfunction of the manual air conditioner control
panel (A/C-ECU)
•Damaged the wiring harness or connectors
•Malfunction of the engine-ECU or the
engine-A/T-ECU
DIAGNOSIS
STEP 1. Check the defogger and outside/inside
air selection damper control motor operation.
Q: Do the defogger and outside/inside air selection
damper control motor work normally?
YES :
Go to Step 2.
NO : Refer to Inspection procedure 10
"Malfunction of the A/C-ECU power supply
system P.55-56 ."
STEP 2. Check the blower motor operation.
Q: Does the blower motor work normally?
YES :
Go to Step 3.
NO : Refer to Inspection procedure 5 "Blower fan
and motor do not turn P.55-29."
STEP 3. Check the A/C compressor.
Check the A/C compressor for compressor oil leaks.
Q: Is the check result satisfactory?
YES :
Go to Step 4.
NO : Replace the A/C compressor or the
expansion valve.
STEP 4. Connector check: B-114 A/C compressor
connector and C-123 engine-ECU connector
or C-122 engine-A/T-ECU connector
Q: Is the check result normal?
YES :
Go to Step 5.
NO : Repair the connector.
AC303786
Connector: B-114
<4G1-R.H.D.>
AB
Harness side
B-114 (B)
AC303794
Connector: B-114
<4G6-R.H.D.>
AB
Harness side
B-114 (B)
AC303817
Connectors: C-122 , C-123
AF

C-122C-122 (GR)
C-123 (Y)
C-123 Harness side

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-22
STEP 5. Voltage measurement at the B-114 A/C
compressor connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the "ON" position.(3) Disconnect engine-ECU connector C-123, and
earth terminal 8.
(4) Disconnect engine-A/T-ECU connector C-122,
and earth terminal 20.
(5) Measure the voltage between terminal 1 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 6.
NO : Refer to Inspection procedure 11 "A/C
compressor power supply system P.55-59."
AC303786
Connector: B-114
<4G1-R.H.D.>
AB
Harness side
B-114 (B)
AC303794
Connector: B-114
<4G6-R.H.D.>
AB
Harness side
B-114 (B)
AC303817
Connectors: C-122 , C-123
AF

C-122C-122 (GR)
C-123 (Y)
C-123 Harness side
AC305159 Connector C-123
(Harness side)AB
AC305161
Connector C-122
(Harness side)
AB
AC301541EW
Connector B-114
(Harness side)
1

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-23
STEP 6. Connector check: C-139 A/C-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO : Repair the connector.
STEP 7. Voltage measurement at C-139 A/C-ECU
connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Turn the blower switch to the "ON" position.
(4) Measure the voltage between terminal 8 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 10.
NO : Go to Step 8.
STEP 8. Connector check: C-109 resistor
connector
Q: Is the check result normal?
YES :
Go to Step 9.
NO : Repair the connector.
STEP 9. Check the wiring harness between C-109
resistor connector terminal No.4 and C-139
A/C-ECU connector terminal No.8.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
AC303818
Connector: C-139

AJ
Harness side
C-139 (B)
11 12657 8 9 103 421
AC303818
Connector: C-139

AJ
Harness side
C-139 (B)
11 12657 8 9 103 421
AC301541EY
Connector C-139
(Harness side)
11 12
65
7 8 9 10
3 421
AC303816
Connector: C-109
AJ

Harness side
AC303816
Connector: C-109
AJ

Harness side
AC303818
Connector: C-139

AJ
Harness side
C-139 (B)
11 12657 8 9 103 421

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-30
COMMENTS ON TROUBLE SYMPTOM
If the blower fan and motor does not turn when the
blower switch is operated, the blower switch may be
defective.
TROUBLESHOOTING HINTS
•Malfunction of the blower relay
•Malfunction of the blower switch
•Damaged the wiring harness or connectors
•Malfunction of the blower motor
DIAGNOSIS
STEP 1. Check that the blower motor operates
when the blower switch is moved to the "4 (HI) "
position.
(1) Turn the ignition switch to the "ON" position.
(2) Turn the blower switch to the "4 (HI) " position.
Q: Does the blower motor operate when the blower
switch is moved to the "4 (HI) " position?
YES :
Refer to Inspection procedure 6 "Blower air
amount cannot be changed P.55-39."
NO : Go to Step 2.
STEP 2. Connector check: C-110 blower motor
connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO : Repair the connector.
STEP 3. Resistance measurement at the C-110
blower motor connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Measure the resistance between terminal 2 and
body earth.
OK: 2 ohms or less
Q: Is the check result normal?
YES :
Go to Step 5.
NO : Go to Step 4.
AC303804
Connector: C-110

AF
Harness side
AC303816
Connector: C-110
AK

Harness side
AC303804
Connector: C-110

AF
Harness side
AC303816
Connector: C-110
AK

Harness side
AC301541EG
Connector C-110
(Harness side)
2
1

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-31
STEP 4. Check the wiring harness between C-110
blower motor connector terminal No.2 and body
earth.
•Check the blower motor earth line for open
circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
STEP 5. Voltage measurement at C-110 blower
motor connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Turn the blower switch to the "4 (HI) " position.
(4) Measure the voltage between terminal 1 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 20.
NO : Go to Step 6.
AC303804
Connector: C-110

AF
Harness side
AC303816
Connector: C-110
AK

Harness side
AC303804
Connector: C-110

AF
Harness side
AC303816
Connector: C-110
AK

Harness side
AC301541CA
Connector C-110
(Harness side)
2
1

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-44
STEP 3. Voltage measurement at F-22 rear
window defogger connector.
(1) Disconnect the connector, and measure at the
wiring harness side.(2) Turn the ignition switch to the "ON" position.
(3) Turn the rear window defogger switch to the "ON
" position.
(4) Measure the voltage between terminal 1 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 14.
NO : Go to Step 4.
AC303954
Connector: F-22

AI
Harness side
AC303943
Connector: F-22

Harness side
AD
AC303956
Connector: F-22
Harness side
AH

AC303945
Harness side
AE
Connector: F-22

AC400965AJ
Connector F-22
(Harness side)
1
SEDAN and WAGON
AC400965AI
Connector F-22
(Harness side)
SEDAN and WAGON

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-51
STEP 14. Connector check: F-06 rear window
defogger connectorQ: Is the check result normal?
YES :
Go to Step 15.
NO : Repair the connector.
STEP 15. Resistance measurement at F-06 rear
window defogger connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Measure the resistance value between terminal 1
and earth.
OK: 2 ohms or less
Q: Is the check result normal?
YES :
Go to Step 17.
NO : Go to Step 16.
AC303954
Connector: F-06

AH
Harness side
AC303943
Connector: F-06
Harness side
AE

AC303956
Harness side
AG
Connector: F-06

AC303945
Harness side
AF
Connector: F-06

AC303943
Connector: F-06
Harness side
AE

AC303945
Harness side
AF
Connector: F-06

AC301541EP
Connector F-06
(Harness side)
1

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-54
DIAGNOSIS
STEP 1. Connector check: C-139 A/C-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO : Repair the connector.
STEP 2. Voltage measurement the voltage at
C-139 A/C-ECU connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 10 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 4.
NO : Go to Step 3.
STEP 3. Check the wiring harness between C-139
A/C-ECU connector terminal No.10 and the
ignition switch (IG2).
NOTE:
Prior to the wiring harness inspection, check junction
block connectors C-210 and C-212, and repair if
necessary.
•Check the A/C-ECU power supply line for open
circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
AC303802
Connector: C-139

AE
C-139 (B)
Harness side
AC303802
Connector: C-139

AE
C-139 (B)
Harness side
AC301541EQ
Connector C-139
(Harness side)
9
1
1574
12
1110
23
13
5
14616
8
AC303802
Connector: C-139

AE
C-139 (B)
Harness side
AC303809
Junction block (front view)
Connectors: C-210, C-212
C-210
Harness side
C-212
C-210
AJ

C-212
Harness side