Mitsubishi Galant 9G. Manual — part 271
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-160
STEP 2. Check defogger relay connector C-201 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is defogger relay connector C-201 in good condition?
YES : Go to Step 3.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. The
defogger system should work normally.
STEP 3. Check the defogger relay continuity.
Follow the table below to check the defogger relay for continu-
ity.
Q: Is the defogger relay in good condition?
YES : Go to Step 4.
NO : Replace the defogger relay. The defogger system
should work normally.
STEP 4. Check defogger relay connector D-14 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is defogger relay connector D-14 in good condition?
YES : Go to Step 5.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. The
defogger system should work normally.
AC305415BE
CONNECTOR: C-201
JUNCTION BLOCK SIDE
JUNCTION BLOCK
(FRONT VIEW)
BATTERY VOLTAGE CONNECT
TESTER
BETWEEN
SPECIFIED
CONDITION
Not applied
4
− 5
Open Circuit
• Connect terminal 1
to the positive
battery terminal
• Connect terminal 3
to the negative
battery terminal
4
− 5
Less than 2 ohms
AC209677
4
5
1 2 3
5
1
4
3
DEFOGGER RELAY
AD
AC305268
CONNECTOR: D-14
AJ
HARNESS SIDE
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-161
STEP 5. Measure the voltage at choke coil connector D-14.
(1) Disconnect choke coil connector D-14, and measure the
voltage at the harness side.
(2) Disconnect A/C-ECU connector C-09 and ground harness
side terminal No.27.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between choke coil connector D-14
terminal No.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 13.
NO : Go to Step 6.
AC305268
CONNECTOR: D-14
AJ
HARNESS SIDE
AC305233
C-09 (B)
HARNESS SIDE
21
22
23
24
25
26
27
28
29
30
31
32
BB
CONNECTOR: C-09
AC306468
21
22
23
24
25
26
27
28
29
30
31
32
AC306468
CONNECTOR C-09
(HARNESS SIDE)
AE
AC209365GZ
CONNECTOR D-14
(HARNESS SIDE)
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-162
STEP 6. 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) Measure the voltage between terminal 5 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 8.
NO : Go to Step 7.
STEP 7. Check the wiring harness between defogger relay
connector C-201 (terminal 5) and the fusible link (1).
AC305415BE
CONNECTOR: C-201
JUNCTION BLOCK SIDE
JUNCTION BLOCK
(FRONT VIEW)
AC209365
CONNECTOR C-201
(JUNCTION BLOCK SIDE)
HA
AC305416
CONNECTORS: C-201, C-216
JUNCTION BLOCK
(FRONT VIEW)
HARNESS SIDE
C-201
C-216 (B)
C-216
C-201
JUNCTION BLOCK SIDE
AP
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-163
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 and junction block connector C-216 is dam-
aged, 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 5) and the fusible link (1) in good
condition?
YES : Check that the defogger system works normally.
NO : Repair the wiring harness. Check that the defogger
system works normally.
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.
AC305231AI
CONNECTOR: C-29
AC305415BE
CONNECTOR: C-201
JUNCTION BLOCK SIDE
JUNCTION BLOCK
(FRONT VIEW)
AC209365HB
CONNECTOR C-201
(JUNCTION BLOCK SIDE)
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