STEP 1. Using scan tool (M.U.T.-IIISE), check data list.
(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 Scan Tool (M.U.T.-IIISE)
".
(2) Check that the following data list display contents are normal (Refer to ).Item No.20: Air thermo sensor
Is the check result normal?
Go to Step 4. Go to Step 2.
STEP 2. Check of open and short circuit in + and - line between fin thermo sensor and auto heater controller assembly (A/C-ECU) connector.
STEP 3. Check the fin thermo sensor.
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Recheck the DTC.(1) Erase the DTC.
(2) Electric motor switch: OFF to ON
(3) Check the DTC.
Is the DTC set?
Replace the heater controller assembly (A/C-ECU). The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).