[ Model - ECLIPSE CROSS / Year - 2018 ]
INSPECTION PROCEDURE 4: The blower air volume cannot be changed
2018 / ECLIPSE CROSS / EC - Workshop Manual
55 -HEATER, AIR CONDITIONER AND VENTILATION > TROUBLESHOOTING > SYMPTOM PROCEDURES > BLOWER AIR AMOUNT CANNOT BE CHANGED.
 
 
 
 
COMMENTS ON TROUBLE SYMPTOM
If air volume cannot be adjusted by using the blower control, the A/C control panel, the A/C controller assembly (A/C-ECU) or the power transistor may be faulty.
 
 
 
PROBABLE CAUSES
  • Malfunction of the power transistor
  • Damaged wiring harness or connectors
  • Malfunction of the A/C controller assembly (A/C-ECU)
 
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE diagnosis code
Check that the diagnosis code related to the air conditioner is not set.
Is the diagnosis code set?
Carry out the diagnosis code procedures. Refer to .
Go to Step 2.
 
STEP 2. Resistance measurement at the power transistor connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Continuity between earth terminal and body earth.
OK: Continuity exists (2 Ω or less)
Is the check result normal?
Go to Step 3.
Repair the wiring harness wires between power transistor connector earth terminal and body earth.
 
STEP 3. Check of open circuit in P/TB and P/TC line between blower motor connector, power transistor 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. Recheck the trouble symptom.
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the power transistor. Then go to Step 5.
 
STEP 5. Recheck the trouble symptom.
Is the check result normal?
This diagnosis is complete.
Replace the A/C controller assembly (A/C-ECU).