2005 MITSUBISHI LANCER ignition switch

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 VENTILATION55-32
STEP 6. Connector check: C-214 blower relay
connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO : Repair the connector.
STEP 7. Check the blower relay continuity.
Refer to P.55-75.
Q: Is the blower relay continuity in good condition?
YES :
Go to Step 8.
NO : Replace the blower relay.
STEP 8. Voltage measurement at C-214 blower
relay connector.
(1) Remove the relay, and measure at the junction
block side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 3 and
earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 10.
NO : Go to Step 9.
AC303808
Junction block side Junction block (front view)
Connector: C-214
AL

AC303822
Junction block side Junction block (front view)
Connector: C-214
AM

AC303808
Junction block side Junction block (front view)
Connector: C-214
AL

AC303822
Junction block side Junction block (front view)
Connector: C-214
AM

AC301541EI
Connector C-214
(Junction block side)
3
4
5
12

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-33
STEP 9. Check the wiring harness between C-214
blower relay connector terminal No.3 and the
ignition switch (IG2).
NOTE: Prior to the wiring harness inspection, check
junction block connector C-210, and repair if
necessary.
•Check the blower 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 10. Resistance measurement at C-214
blower relay connector.
(1) Remove the relay, and measure at the junction
block side.
(2) Measure the resistance Continuity between
terminal 1 and body earth.
OK: 2 ohms or less
Q: Is the check result normal?
YES :
Go to Step 13.
NO : Go to Step 11.
NO : Go to Step 12.
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

AC303808
Junction block side Junction block (front view)
Connector: C-214
AL

AC303822
Junction block side Junction block (front view)
Connector: C-214
AM

AC301541EJ
Connector C-214
(Junction block side)
3
4
5
12

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 Blower Switch and Resistor Circuit

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

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 VENTILATION55-47
Prior to the wiring harness inspection, check
intermediate connector C-121 and C-138 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 9. Voltage measurement at C-213 rear
window defogger relay connector.
(1) Remove the relay, and measure at the junction
block side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 3 and
earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 11.
NO : . Go to Step 10.
STEP 10. Check the wiring harness between
C-213 rear window defogger relay connector
terminal No.3 and ignition switch (IG2).
AC303808
Junction block side Junction block (front view)
Connector: C-213
AK

AC303822
Junction block side Junction block (front view)
Connector: C-213
AL

AC301541EO
Connector C-213
(Junction block side)
3
4
5
12
AC303809
Connectors: C-210, C-213
AK
C-213
C-210
Junction block (front view)
C-210 Harness side
Junction block side
C-213
AC303823
Junction block side Junction block (front view)
Connectors: C-210, C-213
C-210C-213 Harness side
C-213
C-210
AI