Mitsubishi Galant 9G. Manual — part 283

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-208

STEP 4. Check the blower relay continuity.
Follow the table below to check the blower relay for continuity.

Q: Is the blower relay continuity in good condition?

YES : Go to Step 5.
NO : Replace the blower relay. The blower motor should

operate normally.

STEP 5. Measure the voltage at blower relay connector
C-202.
(1) Disconnect blower relay connector C-202, 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 7.
NO : Go to Step 6.

BATTERY
VOLTAGE

TESTER
CONNECTION

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

AC306657

AB

4

5

1 2 3

5

1

4

3

BLOWER RELAY

AC305415BC

CONNECTOR: C-202

JUNCTION BLOCK SIDE

JUNCTION BLOCK
(FRONT VIEW)

AC209365

CONNECTOR C-202
(JUNCTION BLOCK SIDE)

GX

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-209

STEP 6. Check the wiring harness between blower relay
connector C-202 (terminal 1) and the ignition switch (IG2).

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

P.00E-2

.

Q: Is the wiring harness between blower relay connector

C-202 (terminal 1) and the 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

P.00-14

.

NO : Repair the wiring harness. The blower motor should

operate normally.

AC305416

CONNECTORS: C-202, C-215

JUNCTION BLOCK
(FRONT VIEW)

C-215

HARNESS SIDE

C-215

JUNCTION BLOCK SIDE

C-202

C-202

AM

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-210

STEP 7. Measure the voltage at blower relay connector
C-202.
(1) Disconnect blower relay connector C-202, 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 9.
NO : Go to Step 8.

AC305415BC

CONNECTOR: C-202

JUNCTION BLOCK SIDE

JUNCTION BLOCK
(FRONT VIEW)

AC209365GY

CONNECTOR C-202
(JUNCTION BLOCK SIDE)

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-211

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