Mitsubishi Galant (2004+). Manual - part 769

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-215

STEP 8. Check the wiring harness between blower relay 
connector C-202 (terminal 5) and fusible link (1).

AC305015AH

FUSIBLE LINK (1)

FUSIBLE LINKS 
NO.1

AC305231AI

CONNECTOR: C-29

AC305416

CONNECTORS: C-202, C-216

JUNCTION BLOCK 
(FRONT VIEW)

HARNESS SIDE

JUNCTION BLOCK SIDE

C-202

C-202

C-216 (B)

C-216

AN

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-216

NOTE: Also check intermediate connector C-29 and junction 
block connector C-216 for loose, corroded, or damaged termi-
nals, or terminals pushed back in the connector. If intermediate 
connector C-29, junction block connector C-216 is damaged, 
repair or replace the connector as described in GROUP 00E, 
Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between blower relay connector 

C-202 (terminal 5) and fusible link (1) in good condition?
YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-6

.

NO :  Repair the wiring harness. The blower motor should 

operate normally.

STEP 9. Check the wiring harness between blower relay 
connector C-202 (terminal 3) and A/C-ECU connector C-15 

(terminal 9).

AC305233

CONNECTOR: C-15

BG

C-105 (B)

HARNESS SIDE

AC305416

CONNECTORS: C-202, C-211

JUNCTION BLOCK 
(FRONT VIEW)

JUNCTION BLOCK SIDE

C-202

C-202

AO

HARNESS SIDE

C-211

C-211

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-217

NOTE: Also check junction block connector C-211 for loose, 
corroded, or damaged terminals, or terminals pushed back in 
the connector. If junction block connector C-211 is damaged, 
repair or replace the connector as described in GROUP 00E, 
Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between blower relay connector 

C-202 (terminal 3) and A/C-ECU connector C-15 
(terminal 9) in good condition?
YES :  Go to Step 10.
NO :  Repair the wiring harness. The blower motor should 

operate normally.

STEP 10. Check the wiring harness between blower motor 
connector C-115 (terminal 1) and blower relay connector 
C-202 (terminal 4).

Q: Is the wiring harness between blower motor connector 

C-115 (terminal 1) and blower relay connector C-202 
(terminal 4) in good condition?
YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-6

.

NO :  Repair the wiring harness. The blower motor should 

operate normally.

STEP 11. Check the blower fan and motor operation.

When battery voltage is applied between the terminals, check 
that the motor operates. Also, check that there is no abnormal 
noise.
Q: Is there any abnormal noise?

YES :  Go to Step 12.
NO :  Replace the blower relay. The blower motor should 

operate normally.

AC305233BN

CONNECTOR: C-115

HARNESS SIDE

AC305415BC

CONNECTOR: C-202

JUNCTION BLOCK SIDE

JUNCTION BLOCK 
(FRONT VIEW)

AC209862

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-218

STEP 12. Check blower power transistor connector C-104 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.

Q: Is power transistor connector C-104 in good condition?

YES : Go to Step 13.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

.The 

blower motor should operate normally.

STEP 13. Measure the resistance at power transistor 
connector C-104.

(1) Disconnect power transistor connector C-104, and measure 

the resistance at the wiring harness side.

(2) Measure the resistance value between terminal 2 and 

ground.

• The measured value should be 2 ohms or less.

Q: Does the measured resistance value correspond with 

this range?
YES :  Go to Step 15.
NO :   Go to Step 14.

STEP 14. Check the wiring harness between power 
transistor connector C-104 (terminal 2) and ground.

Q: Is the wiring harness between power transistor 

connector C-104 (terminal 2) and ground in good 
condition?
YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-6

.

NO :  Repair the wiring harness. The blower motor should 

operate normally.

AC305233

HARNESS SIDE

BV

CONNECTOR: C-104

AC305233

HARNESS SIDE

BV

CONNECTOR: C-104

AC209364JD

CONNECTOR C-104 
(HARNESS SIDE)

AC305233

HARNESS SIDE

BV

CONNECTOR: C-104