[Previous][Next]
Inspection Procedure 6: The remote climate control does not work correctly (timer setting itself is possible).
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
When a remote climate control does not work correctly (timer setting itself is possible), remote climate control permission conditions are not satisfied, the CHOT (EV start signal), the PHEV-ECU or the A/C control panel (A/C-ECU) or the EV remote-ECU may be defective.
 
 
TROUBLESHOOTING HINTS
  • Remote climate control permission conditions not satisfied
  • The CAN bus line may be defective (The CHOT signal fails)
  • The PHEV-ECU
  • The A/C-ECU
  • The EV remote-ECU
 
 
DIAGNOSIS
STEP 1. A/C operation check
Check whether the air conditioning works normally by operating the A/C panel while the vehicle is driven.
Is the check result normal?
Go to Step 2.
Troubleshoot the A/C (Refer to GROUP 55 - Trouble symptom chart ).
 
STEP 2. Check whether remote climate control permission conditions are satisfied.
Check whether remote climate control permission conditions are satisfied (Refer to ).
Is the check result normal?
Go to Step 3.
Satisfy the conditions (Refer to ).
 
STEP 3. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch 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) Press the electric motor switch to turn on the power supply mode.
(3) Diagnose the CAN bus line.
(4) Press the electric motor switch to turn off the power supply mode.
Is the CAN bus line found to be normal?
Go to Step 4.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
 
STEP 4. Using scan tool (M.U.T.-IIISE), check the DTC.
Check if DTC is set in the EV remote-ECU.
Is the DTC set?
Troubleshoot the EV remote-ECU (Refer to ).
Go to Step 5.
 
STEP 5. Using scan tool (M.U.T.-IIISE), read the other system DTC.
Check if DTC is set in the A/C-ECU or PHEV-ECU.
Is the DTC set?
: Troubleshoot the A/C (Refer to GROUP 55 - Troubleshooting ).
: Troubleshoot the PHEV-ECU (Refer to GROUP 54Da - Troubleshooting ).
Go to Step 6.
 
STEP 6. Using scan tool (M.U.T.-IIISE), check the actuator test.
(1) Perform the following actuator tests (Refer to ).
  • Item No.3: Circuit fault detection
(2) Check if DTC is set.
Is the check result normal?
Troubleshoot the EV remote-ECU (Refer to ).
Go to Step 7.
 
STEP 7. Retest the system.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
: Replace the EV remote-ECU (Refer to ).