Mitsubishi L200. Manual — part 877
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-37
STEP 11. Check the wiring harness between C-
201 blower relay connector terminal No.2 and
earth.
AC509934 AW
Connectors: C-201, C-208 <LHD>
Junction block side
Junction block (Front view)
C-201
Harness side
C-208
C-201
C-208
AC509936BN
Connectors: C-201, C-208 <RHD>
Junction block side
Junction block (Front view)
C-201
Harness side
C-201
C-208
C-208
NOTE: Prior to the wiring harness inspection, check
junction block connector C-208, and repair if neces-
sary.
• Check the blower relay earth line for open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction ).
NO :
Repair the wiring harness.
STEP 12. Check the wiring harness between C-
201 blower relay connector terminal No.3 and C-
28 blower motor connector terminal No.1.
AC509613
Connector: C-28 <LHD>
BU
Harness side
AC509934 AU
Connectors: C-201, C-207 <LHD>
Junction block side
Junction block (Front view)
C-201
Harness side
C-207
C-201
C-207
AC509930BU
Connector: C-28 <RHD>
Harness side
AC509936 AQ
Connectors: C-201, C-207 <RHD>
Junction block side
Junction block (Front view)
C-201
Harness side
C-207
C-201
C-207
NOTE: Prior to the wiring harness inspection, check
junction block connector C-207, and repair if neces-
sary.
• Check the blower relay power supply line for
open circuit.
Q: Is the check result normal?
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-38
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction ).
NO :
Repair the wiring harness.
STEP 13. Connector check: C-46 power
transistor connector
AC509611CG
Connector: C-46 <LHD>
Harness side
AC509932CN
Harness side
Connector: C-46 <RHD>
Q: Is the check result normal?
YES :
Go to Step 14.
NO :
Repair the connector.
STEP 14. Check the wiring harness between C-28
blower motor connector terminal No.2 and C-46
power transistor connector terminal No.1.
AC509613
Connector: C-28 <LHD>
BU
Harness side
AC509930BU
Connector: C-28 <RHD>
Harness side
AC509611CG
Connector: C-46 <LHD>
Harness side
AC509932CN
Harness side
Connector: C-46 <RHD>
• Check the blower relay earth wires for open cir-
cuit.
Q: Is the check result normal?
YES :
Go to Step 15.
NO :
Repair the wiring harness.
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-39
STEP 15. Connector check: C-44 A/C-ECU
connector
AC509611CH
Connector: C-44 <LHD>
Harness side
AC509932CO
Connector: C-44 <RHD>
Harness side
Q: Is the check result normal?
YES :
Go to Step 16.
NO :
Repair the connector.
STEP 16. Check the wiring harness between C-46
power transistor connector (terminals 1 and 3)
and C-44 A/C-ECU connector (terminals 36 and
35).
AC509611 CK
Connectors: C-44,C-46 <LHD>
C-44 Harness side
C-46Harness side
C-44
C-46
AC509932CT
Connectors: C-44, C-46 <RHD>
C-44
Harness side
C-46 Harness side
C-44 C-46
C-44 Harness side
• Check the A/C-ECU input line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 17.
NO :
Repair the wiring harness.
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-40
STEP 17. Resistance measurement at the C-46
power transistor connector.
AC509611CG
Connector: C-46 <LHD>
Harness side
AC509932CN
Harness side
Connector: C-46 <RHD>
(1) Disconnect the connector, and measure at the
wiring harness side.
AC310506IB
Connector C-46
(Harness side)
(2) Measure the resistance between terminal 2 and
body earth.
OK: Continuity (Less than 2
Ω)
Q: Is the check result normal?
YES :
Go to Step 19.
NO :
Go to Step 18.
STEP 18. Check the wiring harness between C-46
power transistor connector terminal No.2 and
body earth.
AC509611CG
Connector: C-46 <LHD>
Harness side
AC509932CN
Harness side
Connector: C-46 <RHD>
• Check the power transistor earth line for open cir-
cuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction ).
NO :
Repair the wiring harness.
STEP 19. Replace the power transistor, and then
recheck the trouble symptom
Check that the blower motor works normally.
Q: Is the check result normal?
YES :
This diagnosis is complete.
NO :
Replace the A/C-ECU.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст