[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
55 -HEATER, AIR CONDITIONER AND VENTILATION > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > B1124/B1127 A/M DAMPER CIRCUIT OPEN, SHORT
Code No.B1124: Air mixing damper system (open circuit)
Code No.B1127: Air outlet damper system (short circuit)
 
 
 
 
COMMENTS ON TROUBLE SYMPTOM
  • When the air conditioner outlet temperature cannot be adjusted, open circuit (Code No. B1124) and short circuit (Code No. B1127) of the air mixing damper control motor circuit are set. <Single-zone AUTO A/C>
  • When the air conditioner outlet temperature on the driver's seat side cannot be adjusted, open circuit (Code No. B1124) and short circuit (Code No. B1127) of the air mixing damper control motor circuit are set. <Dual-zone AUTO A/C>
 
 
 
PROBABLE CAUSES
  • Malfunction of the air mix damper control motor <Single-zone AUTO A/C>
  • Malfunction of the air mix damper control motor (Driver’s side) <Dual-zone AUTO A/C>
  • Damaged wiring harness or connectors
  • Malfunction of the A/C controller assembly (A/C-ECU)
 
 
 
DIAGNOSIS PROCEDURE
STEP 1. Check the compressor operation
Check that the compressor operates under the following conditions.
  • Engine operation
  • Air volume control dial: Maximum
  • Air conditioner switch: ON
  • Temperature control dial: MAX COOL
Is the check result normal?
Go to Step 2.
Refer to inspection procedure 5 "The A/C compressor does not work" .
 
STEP 2. M.U.T.-IIISE actuator test
Carry out the actuator test (Refer to ).
Item No.19: Driver’s side air mixing damper
Is the check result normal?
Go to Step 4.
Go to Step 3.
 
STEP 3. Check of open circuit in IG1, DA, DA’, DB and DB’ line between air mixing damper control motor connector and A/C controller assembly (A/C-ECU) connector.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
 
STEP 4. Check whether the diagnosis code is set again.
Is the diagnosis code set?
Replace the air mix damper control motor. Then go to Step 5.
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
 
STEP 5. Check whether the diagnosis code is set again.
Is the diagnosis code set?
Replace the A/C controller assembly (A/C-ECU).
This procedure is complete.