STEP 1. Check the clean air filter.
STEP 2. Check the engine coolant level.
STEP 3. Using scan tool (M.U.T.-IIISE), check whether the heater controller assembly (A/C-ECU) DTC is set.
Check if DTC B1115 is set in the 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 if DTC is set.
(4) Turn the electric motor switch to the OFF position.
Is the DTC set?
Carry out the DTC procedures (Refer to ). Go to Step 4.
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the electric heater (electric heater-ECU) DTC is set.
STEP 5. The heater controller assembly (A/C-ECU) using scan tool (M.U.T.-IIISE), check special function or data list.
STEP 6. Check again that the heater works normally.
STEP 7. Check the high-voltage connector and wiring harness.
danger | Carry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle (Refer to GROUP 54Da - Precautions on how to use the high-voltage vehicle ). |
danger | Wear the specified protection equipment during the check. |
1. Shut down the high voltage (Refer to GROUP 00 - Precautions before Service - Precautions on handling high-voltage vehicle ). 2. Check the following terminal (bolt).- High-voltage terminal (bolt) for the electric heater
3. Visually check the high-voltage wiring harnesses for damage.
Is the check result normal?
Go to Step 8. : Repair the connector(s) or wiring harness.
STEP 8. Check the heater water valve assembly.
STEP 9. Check again that the heater works normally.