Mitsubishi Galant (2004+). Manual — part 753
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-151
STEP 15. Measure the resistance at blower motor
connector C-115 in order to the ground circuit to the
blower motor.
(1) Disconnect blower motor connector C-115, 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 17.
NO : Go to Step 16.
STEP 16. Check the wiring harness between blower motor
connector C-115 (terminal 2) and ground.
Q: Is the wiring harness between blower motor connector
C-115 (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
NO : Repair the wiring harness. The blower motor should
operate normally.
STEP 17. 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 : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
NO : Replace the blower relay. The blower motor should
operate normally.
AC305233BN
CONNECTOR: C-115
HARNESS SIDE
AC209364
CONNECTOR C-115
(HARNESS SIDE)
IT
AC305233BN
CONNECTOR: C-115
HARNESS SIDE
AC209862
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-152
INSPECTION PROCEDURE 6: Blower Air Amount cannot be Changed.
.
CIRCUIT OPERATION
If the blower motor speed cannot be changed, the
power transistor circuit is suspected.
.
TROUBLESHOOTING HINTS
• Malfunction of the power transistor
• Malfunction of the front A/C-ECU
• Damaged harness wires or connectors
BLOWER RELAY
BLOWER
SWITCH
RESISTOR
BLOWER
MOTOR
Blower Switch and Resistor Circuit
AC305233BR
CONNECTORS: C-14, C-103, C-115
C-103
C-115
C-14
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-153
DIAGNOSIS
Required Special Tool:
• MB991223: Test Harness Set
STEP 1. Check resistor connector C-103 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is resistor connector C-103 in good condition?
YES : Go to Step 2.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. Check
that the air conditioning works normally.
STEP 2. Check the resistor resistance value.
Use an ohmmeter to measure the resistance between the ter-
minals. Check that the measured value is at the standard
value.
Standard value:
Q: Is the measured value at the standard value?
YES : Go to Step 3.
NO : Replace the resistor. The blower motor should
operate normally.
STEP 3. Check blower motor connector C-115 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is blower motor connector C-115 in good condition?
YES : Go to Step 4.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. Check
that the air conditioning works normally.
AC305233
HARNESS SIDE
BQ
CONNECTOR: C-103
MEASUREMENT TERMINAL
STANDARD VALUE
Ω
Between terminals 2 and 3 (LO)
2.79
Between terminals 1 and 2 (ML) 1.49
Between terminals 2 and 4 (MH) 0.39
AC307313
1 2
3 4
AC305233BN
CONNECTOR: C-115
HARNESS SIDE
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-154
STEP 4. Check the wiring harness blower switch
connector C-115 (terminal 1) and resistor connector C-103
(terminal 2).
Q: Is the wiring harness between blower switch connector
C-115 (terminal 1) and resistor connector C-103
(terminal 2) in good condition?
YES : Go to Step 5.
NO : Repair the wiring harness. The blower motor should
operate normally.
STEP 5. Check blower switch connector C-14 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is blower switch connector C-14 in good condition?
YES : Go to Step 6.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. Check
that the air conditioning works normally.
AC305234
CONNECTORS: C-103, C-115
C-103
C-115
HARNESS SIDE
C-103
HARNESS SIDE
C-115
AK
AC305233
HARNESS SIDE
BO
CONNECTOR: C-14
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст