Mitsubishi 380. Manual — part 200
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION
55-96
NOTE: Also check intermediate connector C-31 and junction
block connector C-216 for loose, corroded, or damaged termi-
nals, or terminals pushed back in the connector. If intermediate
connector C-31, junction block connector C-216 is damaged,
repair or replace the connector as described in GROUP 00E,
Harness Connector Inspection
.
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
− How to
Cope with Intermittent Malfunctions
.
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).
25DB092A
C-15
CONNECTOR: C-15
HARNESS SIDE
C-15
25DB115A
CONNECTORS: C-202, C-211
JUNCTION BLOCK
(FRONT VIEW)
JUNCTION BLOCK SIDE
C-202
C-202
HARNESS SIDE
C-211
C-211
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION
55-97
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
.
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
− How to
Cope with Intermittent Malfunctions
.
NO : Repair the wiring harness. The blower motor should
operate normally.
NOTE: Also check junction block connector C-215 for loose,
corroded, or damaged terminals, or terminals pushed back in
the connector. If junction block connector C-215 is damaged,
repair or replace the connector as described in GROUP 00E,
Harness Connector Inspection
.
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.
25DB110A
CONNECTOR: C-115
HARNESS SIDE
AC209862
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION
55-98
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
.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
− How to
Cope with Intermittent Malfunctions
.
NO : Repair the wiring harness. The blower motor should
operate normally.
25DB116A
HARNESS SIDE
CONNECTOR: C-104
25DB116A
HARNESS SIDE
CONNECTOR: C-104
AC209364JD
CONNECTOR C-104
(HARNESS SIDE)
25DB116A
HARNESS SIDE
CONNECTOR: C-104
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION
55-99
STEP 15. Check the wiring harness between power
transistor connector C-104 (terminal 4) and blower motor
connector C-115 (terminal 2).
Q: Is the wiring harness between power transistor
connector C-104 (terminal 4) and blower motor
connector C-115 (terminal 2) in good condition?
YES : Go to Step 16.
NO : Repair the wiring harness. The blower motor should
operate normally.
STEP 16. Check the wiring harness between power
transistor connector C-104 (terminals 1 and 3) and
A/C-ECU connector C-15 (terminals 17 and 18).
Q: Are the wiring harness between power transistor
connector C-104 (terminals 1 and 3) and A/C-ECU
connector C-15 (terminals 17 and 18) in good condition?
YES : Go to Step 17.
NO : Repair the wiring harness. The blower motor should
operate normally.
25DB117A
C-104
C-115
HARNESS SIDE
C-104
HARNESS SIDE
C-115
CONNECTORS: C-104, C-115
25DB118A
CONNECTORS: C-15, C-104
HARNESS SIDE
C-15
C-104
HARNESS SIDE
C-104
C-15 (B)
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