Mitsubishi MOTORS Lancer 2004, Workshop Manual

Page: 557 / 638

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-23
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
<R.H.D.>
AJ
Harness side
C-139 (B)
11 12
6 5
7 8 9 10
3 4 2 1
AC303818
Connector: C-139
<R.H.D.>
AJ
Harness side
C-139 (B)
11 12
6 5
7 8 9 10
3 4 2 1
AC301541EY
Connector C-139
(Harness side)
11 12
6 5
7 8 9 10
3 4 2 1
AC303816
Connector: C-109
AJ
<R.H.D.>
Harness side
AC303816
Connector: C-109
AJ
<R.H.D.>
Harness side
AC303818
Connector: C-139
<R.H.D.>
AJ
Harness side
C-139 (B)
11 12
6 5
7 8 9 10
3 4 2 1