Code No. U0141: ETACS-ECU Time-out - Outlander 2014 Workshop Manual

Code No. U0141: ETACS-ECU Time-out

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caution

If diagnosis code U0141 is stored in the engine-ECU, surely perform CAN bus line diagnosis.

caution

Replace ECU after certainly confirming that the communication circuits are normal.

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TROUBLE JUDGEMENT

Check Conditions

• More than 2 seconds have passed since the power supply mode of the electric motor switch was ACC.
  
• Auxiliary battery positive voltage is more than 10 V and is less than 16.5 V.
  

Judgement Criterion

• Unable to receive ETACS-ECU signals through the CAN bus line for 4 seconds.
  

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COMMENTS ON TROUBLE SYMPTOM

Current malfunction

• The failure is possibly caused by malfunction of the harness and connector in CAN bus line between engine-ECU and ETACS-ECU, by malfunction in the power supply system of ETACS-ECU, in ETACS-ECU itself, in engine-ECU.
  

Past malfunction

• Proceed with troubleshooting focusing on malfunction of the harness and connector in CAN bus line between engine-ECU and ETACS-ECU and malfunction in the power supply system of ETACS-ECU. For diagnosis procedure, refer to how to cope with past malfunctions. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Treat Past Trouble ).
  

  note

  In the case of past malfunctions, M.U.T.-III CAN bus line diagnosis cannot detect a malfunction even if there is a malfunction in CAN bus. Therefore, check CAN bus line as in the case of response to intermittent malfunctions (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ). It is possible to narrow down areas with a high possibility of malfunctions from diagnosis codes stored in each ECU that performs CAN communication (Refer to GROUP 54C <PHEV> - Explanation about the M.U.T.-III CAN Bus Diagnostics ).

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FAIL-SAFE AND BACKUP FUNCTION

• None
  

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PROBABLE CAUSES

• Failed harness and connector
  
• Failed ETACS-ECU
  
• Failed engine-ECU
  

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DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis

Use M.U.T.-III to perform CAN bus line diagnosis.

Q. Is the check result normal?

	Go to Step 2.

	Repair CAN bus line (Refer to GROUP 54C <PHEV> - Troubleshooting - CAN Bus Diagnostics Table ). After repairing CAN bus line, go to Step 6.

STEP 2. M.U.T.-III diagnosis code

Confirm whether the diagnosis code is stored in the ETACS-ECU.

Q. Is diagnosis code stored?

	Perform troubleshooting of ETACS (Refer to GROUP 54A <PHEV> - ETACS - Diagnosis Code Chart ).

	Go to Step 3.

STEP 3. M.U.T.-III diagnosis code

Check that the other ECU performing CAN communication with ETACS-ECU stores diagnosis code No. U0141 [Refer to GROUP 54C <PHEV> - CAN-related Diagnosis Code Table ].

Q. Is diagnosis code stored?

	Go to Step 4.

	Go to Step 5.

STEP 4. M.U.T.-III diagnosis code

Reconfirmation of diagnosis code.

Confirm again whether the diagnosis code is stored in the engine-ECU.

Erase the stored diagnosis code. Power supply mode of electric motor switch: OFF → ACC Confirm whether the diagnosis code is stored.

Q. Is diagnosis code stored?

	After replacing the ETACS-ECU, go to Step 6.

	Intermittent malfunction in CAN bus line between engine-ECU and ETACS-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 5. M.U.T.-III diagnosis code

Reconfirmation of diagnosis code.

Confirm again whether the diagnosis code is stored in the engine-ECU.

Erase the stored diagnosis code. Power supply mode of electric motor switch: OFF → ACC Confirm whether the diagnosis code is stored.

Q. Is diagnosis code stored?

	After replacing the engine-ECU, go to Step 6.

	Intermittent malfunction in CAN bus line between engine-ECU and ETACS-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 6. M.U.T.-III diagnosis code

Reconfirmation of diagnosis code.

Confirm again whether the diagnosis code is stored in the engine-ECU.

Erase the stored diagnosis code. Power supply mode of electric motor switch: OFF → ACC Confirm whether the diagnosis code is stored.

Q. Is diagnosis code stored?

	Go to Step 1.

	Check end.