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The heater controller assembly (A/C-ECU) will store diagnosis code U1113 when it can receive no signals from the EV remote-ECU.
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The system will determines that the heater controller assembly (A/C-ECU) is defective when the heater controller assembly (A/C-ECU) remains under the conditions below for five seconds and then cannot communicate with the EV remote-ECU for at least 600 ms.
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- No abnormality is present to the network.
- The power supply mode of the electric motor switch is ON.
- No abnormality is present to the power supply fuse, or the odometer value is at 80.5 km or more.
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- Malfunction of CAN bus line
- Malfunction of EV remote-ECU
- Malfunction of heater controller assembly (A/C-ECU)
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Use the M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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Repair the CAN bus lines (Refer to GROUP 54C, Troubleshooting ). On completion, go to Step 6.
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Check whether the EV remote-ECU-related diagnosis code is stored.
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Q.
Is the diagnosis code stored?
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Diagnose the EV remote-ECU. Troubleshooting the EV remote-ECU (Refer to GROUP 54A Troubleshooting ).
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Check if a diagnosis code, which relates to CAN communication-linked systems below, is stored.
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- ETACS-ECU
U1113: EV remote CAN timeout
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Q.
Is the diagnosis code stored?
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Recheck if the diagnosis code is stored.
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(1)Erase the diagnosis code.
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(2)Turn the power supply mode of the electric motor switch to ON.
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(3)Check if the diagnosis code is stored.
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Q.
Is the diagnosis code stored?
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Replace the EV remote-ECU, and then go to Step 6.
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A poor connection, open circuit or other intermittent malfunction in the CAN bus line between the EV remote-ECU and the heater controller assembly (A/C-ECU) (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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Recheck if the diagnosis code is stored.
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(1)Erase the diagnosis code.
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(2)Turn the power supply mode of the electric motor switch to ON.
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(3)Check if the diagnosis code is stored.
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Q.
Is the diagnosis code stored?
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Replace the heater controller assembly (A/C-ECU), and then go to Step 6.
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A poor connection, open circuit or other intermittent malfunction in the CAN bus line between the EV remote-ECU, and the heater controller assembly (A/C-ECU) (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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Recheck if the diagnosis code is stored.
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(1)Erase the diagnosis code.
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(2)Turn the power supply mode of the electric motor switch to ON.
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(3)Check if the diagnosis code is stored.
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Q.
Is the diagnosis code stored?
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The procedure is complete.
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