Mitsubishi L200. Manual — part 885
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-69
STEP 9. Check the wiring harness between C-217
rear window defogger relay connector No.2 and
D-11 rear panel power window-ECU connector
No.15.
AC509611AR
Connector: C-43 <LHD>
Harness side
AC509932AS
Harness side
Connector: C-43 <RHD>
AC509934 BB
Connectors: C-208, C-217 <LHD>
Harness side
C-208
C-217
C-217
C-208
Junction block side
Junction block (Front view)
AC509936AY
Connectors: C-208, C-217 <RHD>
Harness side
C-208
C-217
C-217
C-208
Junction block side
Junction block (Front view)
NOTE:
AC509613AR
Connector: C-15 <LHD>
AC509932BH
Connector: C-15 <RHD>
Prior to the wiring harness inspection, check junction
block connector C-208 and intermediate connector
C-15, and repair if necessary.
• Check the rear window defogger power supply
line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Repair the wiring harness.
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-70
STEP 10. Check the wiring harness between C-
217 rear window defogger relay connector No.3
and D-08 rear window defogger connector No.1.
AC509934BC
Connectors: C-212, C-217 <LHD>
Harness side
C-212
C-217
C-212
C-217
Junction block side
Junction block (Front view)
AC509936AZ
Connectors: C-212, C-217 <RHD>
Harness side
C-212
C-217
C-212
C-217
Junction block side
Junction block (Front view)
AC509967AP
Harness side
Connector: D-08 <Double cab>
NOTE: Prior to the wiring harness inspection, check
junction block connector C-212, and repair if neces-
sary.
• Check the rear window defogger relay line for
open or short 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 11. Resistance measurement at D-08 rear
window defogger connector.
AC509967AP
Harness side
Connector: D-08 <Double cab>
(1) Disconnect the connector, and measure at the
wiring harness side.
AC403234
Connector D-08
(Harness side)
EI
(2) Continuity between terminal 2 and body earth.
OK: Continuity (Less than 2
Ω)
Q: Is the check result normal?
YES :
Go to Step 13.
NO :
Go to Step 12.
STEP 12. Check the wiring harness between D-08
rear window defogger connector terminal No.2
and earth.
AC509967AP
Harness side
Connector: D-08 <Double cab>
• Check the rear window defogger 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 or replace the wiring harness.
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-71
STEP 13. Connector check: C-43 A/C-ECU
connector
AC509611AR
Connector: C-43 <LHD>
Harness side
AC509932AS
Harness side
Connector: C-43 <RHD>
AC509967AP
Harness side
Connector: D-08 <Double cab>
Q: Is the check result normal?
YES :
Go to Step 14.
NO :
Repair the connector.
STEP 14. Check the wiring harness between C-43
A/C-ECU connector terminal No.14 and D-11 rear
panel power window-ECU connector terminal
No.3.
AC509967AP
Harness side
Connector: D-08 <Double cab>
NOTE: Prior to the wiring harness inspection, check
intermediate connector C-15, and repair if necessary.
• Check the rear window defogger earth line for
open circuit.
Q: Is the check result normal?
YES :
Go to Step 15.
NO :
Repair or replace the wiring harness.
STEP 15. Check the rear window defogger.
Refer to GROUP 54A, Rear Window rear window
defogger Inspection .
Q: Does the rear window defogger work normally?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction ).
NO :
Repair the rear window defogger.
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-72
Inspection Procedure 8: The PTC heater does not work <Russia>
PTC Heater Circuit
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple
FUSIBLE
LINK
IGNITION
SWITCH (IG2)
PTC
HEATER
RELAY 2
PTC
HEATER
RELAY 1
PTC
HEATER 1
PTC
HEATER 2
ENGINE-
ECU
A/C-
ECU
3
1
4
2
3
1
4
2
ACA00487
25
COMMENTS ON TROUBLE SYMPTOM
When the PTC heater does not work under the fol-
lowing conditions, the heater switch system or the
PTC heater circuit system may be defective.
PTC heater operating conditions
• heater switch: ON
• Air outlet: FOOT/DEF, FOOT, FACE/FOOT
• Temperature control dial: MAX HOT
• Coolant temperature: 80 degrees celsius or less
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