STEP 1. Using scan tool (M.U.T.-IIISE), check whether the heater controller assembly (A/C-ECU) DTC is set.
Check that the DTC related to the air conditioning is not set (Refer to <heater controller assembly (A/C-ECU)>).(1) caution | To prevent damage to scan tool (M.U.T.-IIISE), always turn the electric motor switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-IIISE). |
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE)
".
(2) Turn the electric motor switch from OFF position to ON position.
(3) Check the DTC is set.
(4) Turn the electric motor switch to the OFF position.
Is the DTC set?
Carry out the diagnostic trouble code procedures. Go to Step 2.
STEP 2. Using scan tool (M.U.T.-IIISE), check actuator test [The heater controller assembly (A/C-ECU)].
STEP 3. Check of open circuit in IG1, DA, DA', DB, DB' line between air mixing damper control motor connector (driver's side) and heater controller assembly (A/C-ECU) connector.
STEP 4. The heater controller assembly (A/C-ECU) using scan tool (M.U.T.-IIISE), check actuator test.
STEP 5. Check of open circuit in IG1, PA, PA', PB, PB' line between air mixing damper control motor connector (passenger's side) and heater controller assembly (A/C-ECU) connector.
STEP 6. Replace the air mixing damper control motor (Refer to
), and recheck the trouble symptom.