MITSUBISHI LANCER 2005 Workshop Manual
Manufacturer: MITSUBISHI, Model Year: 2005, Model line: LANCER, Model: MITSUBISHI LANCER 2005Pages: 788, PDF Size: 45.98 MB
Page 521 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-37
STEP 18. Check the wiring harness between
C-140 blower switch connector terminal No.2 and
C-214 blower relay connector terminal No.4.
NOTE: Prior to the wiring harness inspection, check
junction block connectors C-210, and repair if
necessary.
•Check the blower relay output line for open
circuit.
Q: Is the check result normal?
YES :
Go to Step 19.
NO : Repair the wiring harness.
AC303802
Connector: C-140
AF
Harness side
AC303818
Connector: C-140
AK
Harness side
AC303809
Connectors: C-210, C-214
AL
C-214
C-210
Junction block (front view)
C-210 Harness side
Junction block side
C-214
AC303823
Junction block side Junction block (front view)
Connectors: C-210, C-214
C-210C-214 Harness side
C-214
C-210
AK
Page 522 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-38
STEP 19. Check the wiring harness between
C-110 blower motor connector terminal No.1 and
C-140 blower switch connector terminal No.6.
•Check the blower motor 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.
STEP 20. Check the blower fan and motor
operation.
Refer to P.55-86.
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 : Replace the blower motor.AC303804
Connector: C-110
AF
Harness side
AC303816
Connector: C-110
AK
Harness side
AC303802
Connector: C-140
AF
Harness side
AC303818
Connector: C-140
AK
Harness side
Page 523 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-39
INSPECTION PROCEDURE 6: Blower Air Amount cannot be Changed.
COMMENTS ON TROUBLE SYMPTOM
If the blower air amount can not be changed when
the blower switch is operated, the blower switch may
be defective.
TROUBLESHOOTING HINTS
•Malfunction of the resistor
•Damaged the wiring harness or connectors
•Malfunction of the blower switch
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 :
Go to STEP 2.
NO : Refer to Inspection procedure 5 "Blower fan
and motor do not turn P.55-29."
BLOWER RELAY
BLOWER
SWITCH
RESISTOR
BLOWER
MOTOR
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
Page 524 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-40
STEP 2. Connector check: C-140 blower switch
connector and C-109 resistor connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO : Repair the connector.
STEP 3. Check the blower switch continuity.
Refer to P.55-79.
Q: Is the blower switch continuity in good condition?
YES :
Go to Step 4.
NO : Replace the blower switch.
STEP 4. Check the resistor resistance value.
Refer to P.55-86.
Q: Is the measured value at the standard value?
YES :
Go to Step 5.
NO : Replace the resistor.
STEP 5. Check the wiring harness between C-140
blower switch connector (terminals 1, 4 and 5)
and C-109 resistor connector (terminals 4, 1 and
3).
AC303804
Connector: C-109
AE
Harness side
AC303816
Connector: C-109
AJ
Harness side
AC303802
Connector: C-140
AF
Harness side
AC303818
Connector: C-140
AK
Harness side
AC303804
Connector: C-109
AE
Harness side
AC303816
Connector: C-109
AJ
Harness side
Page 525 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-41
•Check the blower switch output line for open
circuit.
Q: Is the check result normal?
YES :
Go to Step 6.
NO : Repair the wiring harness.
STEP 6. Connector check: C-110 blower motor
connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO : Repair the connector.
STEP 7. Check the wiring harness between C-110
blower motor connector (terminal 1) and C-109
resistor connector (terminal 2).
•Check the blower motor power supply line for
open circuit.
Q: Is the check result normal?
YES :
No action to be taken.
NO : Repair the wiring harness.
AC303802
Connector: C-140
AF
Harness side
AC303818
Connector: C-140
AK
Harness side
AC303804
Connector: C-110
AF
Harness side
AC303816
Connector: C-110
AK
Harness side
AC303804AL
Connectors: C-109, C-110
C-109
C-110C-109
C-110
Harness side
AC303816
Connectors: C-109, C-110
AP
Harness side
C-109
C-110
C-110
C-109
Page 526 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-42
INSPECTION PROCEDURE 7: Rear Window Defogger Function does not Operate.
IGNITION
SWITCH (IG2) FUSIBLE LINK
REAR WINDOW
DEFOGGER
RELAY
A/C-ECU OR
HEATER
CONTROL UNIT1
: SEDAN
: WAGON
: SEDAN
: WAGON
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
NOTE
REAR WINDOW
DEFOGGERREAR WINDOW
DEFOGGER Rear Window Defogger Circuit
Page 527 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-43
COMMENTS ON TROUBLE SYMPTOM
If the rear window defogger does not operate when
the rear window defogger switch is turned on, the
rear window defogger relay system may be
defective.
TROUBLESHOOTING HINTS
•Malfunction of the rear window defogger relay
•Malfunction of the rear window defogger
•Damaged the wiring harness or connectors
•Malfunction of the manual air conditioner control
panel (A/C-ECU) or the heater control unit
DIAGNOSIS
STEP 1. Check the A/C and outside/inside air
selection damper control motor operation.
Q: Do the A/C and outside/inside air selection damper
control motor work normally?
YES :
Go to Step 2.
NO
"Malfunction of the A/C-ECU Power Supply
system
NO
"Malfunction of the A/C-ECU Power Supply
system
STEP 2. Connector check: F-22 rear window
defogger connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO : Repair the connector.
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
Page 528 of 788
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
AC400965AI
Connector F-22
(Harness side)
SEDAN
Page 529 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-45
STEP 4. Connector check: C-213 rear window
defogger relay connector
Q: Is the check result normal?
YES :
Go to Step 5.
NO : Repair the connector.
STEP 5. Check the rear window defogger relay
continuity.
Refer to P.54A-96.
Q: Is the rear window defogger relay continuity in
good condition?
YES :
Go to Step 6.
NO : Replace the rear window defogger relay.
STEP 6. Voltage measurement at C-213 rear
window defogger relay connector.
(1) Remove the relay, and measure at the junction
block side.
(2) Measure the voltage between terminal 5 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 9.
NO
NO
AC303808
Junction block side Junction block (front view)
Connector: C-213
AK
AC303822
Junction block side Junction block (front view)
Connector: C-213
AL
AC303808
Junction block side Junction block (front view)
Connector: C-213
AK
AC303822
Junction block side Junction block (front view)
Connector: C-213
AL
AC301541EN
Connector C-213
(Junction block side)
3
4
5
12
Page 530 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-46
STEP 7. Check the wiring harness between C-213
rear window defogger relay connector terminal
No.5 and the fusible link (1).
NOTE:
Prior to the wiring harness inspection, check
intermediate connector C-21 and junction block
connector C-211, and repair if necessary.
•Check the rear window defogger relay 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.
STEP 8. Check the wiring harness between C-213
rear window defogger relay connector terminal
No.5 and the fusible link (1).
NOTE:
AC303809
Connectors: C-211, C-213
AM
C-213
C-211
Junction block (front view)
C-211 Harness side
Junction block side
C-213
AC303798
Connector: C-21
AK
AC303823
Connectors: C-211, C-213
AM
C-213
C-211
Junction block (front view)
C-211 Harness side
Junction block side
C-213
AC303816
Connector: C-121
AB
AC303818
Connector: C-138
AI