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DTC B111D Electric heater input VOLT. high
 
 
 
 
DTC SET CONDITION
This code is set when the over voltage abnormality (high voltage of DC 425 volts or more is detected for 2 seconds) judged by the electric heater (electric heater-ECU) is detected.
 
 
TROUBLESHOOTING HINTS
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
  • Malfunction of electric heater (electric heater-ECU)
  • Malfunction of the main drive lithium-ion battery
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Check the high-voltage connector and wiring harness.
dangerCarry 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 ).
dangerWear 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 electric heater (electric heater-ECU) connector.
3. Visually check the following high-voltage wiring harnesses for damage.
  • High-voltage wiring harness on power drive unit side
  • High-voltage wiring harness on electric heater (electric heater-ECU) side
Is the check result normal?
Go to Step 4.
: Repair the connector(s) or the wiring harness wire(s) at the electric heater (electric heater-ECU) side. Then go to Step 4.
: Repair the connector(s) or the wiring harness wire(s) at the power drive unit side. Then go to Step 2.
 
STEP 2. Using scan tool (M.U.T.-IIISE), check whether the power drive unit (FEMCU) DTC set.
Check whether the power drive unit (FEMCU) related DTC is set.
(1)
cautionTo 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?
Diagnose the power drive unit [Refer to GROUP 54Db - DTC chart for electric motor control unit ]. Then go to Step 3.
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check whether the generator control unit (GCU) DTC set.
Check whether the generator control unit (GCU) related DTC is set.
Is the DTC set?
Diagnose the generator control unit [Refer to GROUP 54Db - DTC chart for electric motor control unit (Generator control unit) ]. Then go to Step 4.
Go to Step 4.
 
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?
Go to Step 5.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, - How to Cope with Intermittent Malfunctions ).
 
STEP 5. 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 electric heater (electric heater-ECU) (Refer to ).
This diagnosis is complete.