Mitsubishi 380. Manual — part 205
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION
55-116
STEP 8. Measure the voltage at defogger relay connector
C-201.
(1) Disconnect defogger relay connector C-201, and measure
the voltage at the junction block side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 and ground.
• The measured value should be approximately 12 volts
(battery positive voltage).
Q: Is the measured voltage approx. 12 volts?
YES : Go to Step 10.
NO : Go to Step 9.
STEP 9. Check the wiring harness between defogger relay
connector C-201 (terminal 1) and ignition switch (IG2).
25DB125A
CONNECTOR: C-201
JUNCTION BLOCK SIDE
JUNCTION BLOCK
(FRONT VIEW)
AC209365HB
CONNECTOR C-201
(JUNCTION BLOCK SIDE)
25DB128A
CONNECTORS: C-201, C-215
JUNCTION BLOCK
(FRONT VIEW)
HARNESS SIDE
C-201
JUNCTION BLOCK SIDE
C-201
C-215
C-215
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION
55-117
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
.
Q: Is the wiring harness between defogger relay connector
C-201 (terminal 1) and ignition switch (IG2) 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. Check that the defogger
system works normally.
STEP 10. Check A/C-ECU connector C-15 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is A/C-ECU connector C-15 in good condition?
YES : Go to Step 11.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. Check
that the defogger system works normally.
25DB120A
CONNECTOR: C-15
C-105 (B)
HARNESS SIDE
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION
55-118
STEP 11. Check the wiring harness between defogger relay
connector C-201 (terminal 3) and A/C-ECU connector C-15
(terminal 8).
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 defogger relay connector
C-201 (terminal 3) and A/C-ECU connector C-15
(terminal 8) in good condition?
YES : Go to Step 12.
NO : Repair or replace the wiring harness. Refer to
GROUP 00E, Harness Connector Inspection
. Check that the defogger system works
normally.
25DB120A
CONNECTOR: C-15
C-105 (B)
HARNESS SIDE
25DB129A
CONNECTORS: C-201, C-211
JUNCTION BLOCK
(FRONT VIEW)
HARNESS SIDE
C-201
JUNCTION BLOCK SIDE
C-201
C-211
C-211
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION
55-119
STEP 12. Check the wiring harness between defogger
relay connector C-201 (terminal 4) and choke coil
connector D-11 (terminal 1).
NOTE: Also check junction block connector C-204 for loose,
corroded, or damaged terminals, or terminals pushed back in
the connector. If junction block connector C-204 is damaged,
repair or replace the connector as described in GROUP 00E,
Harness Connector Inspection
.
Q: Is the wiring harness between defogger relay connector
C-201 (terminal 4) and choke coil connector D-11
(terminal 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 or replace the wiring harness. Refer to
GROUP 00E, Harness Connector Inspection
. Check that the defogger system works
normally.
STEP 13. Check choke coil connector D-11 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is choke coil connector D-11 in good condition?
YES : Go to Step 14.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. Check
that the defogger system works normally.
25DB130A
CONNECTORS: C-201, C-204
JUNCTION BLOCK
(FRONT VIEW)
HARNESS SIDE
C-201
JUNCTION BLOCK SIDE
C-201
C-204
C-204
25DB152A
CONNECTORS: D-11
D-11
25DB152A
CONNECTORS: D-11
D-11
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