Code No.U0141 ETACS CAN timeout
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- If the diagnosis code No. U0141 is set, be sure to diagnose the CAN bus line.
- Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
- When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in Immobilizer System - How to Register Key ID.)
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DIAGNOSTIC FUNCTION
When the LDW-ECU receives no signal from the ETACS-ECU for 2.5 seconds or more, it will set diagnosis code No. U0141.
JUDGEMENT CRITERIA
When the LDW-ECU receives no signal from the ETACS-ECU for 2.5 seconds or more, it will determine that the system is defective.
PROBABLE CAUSES
- Malfunction of the CAN bus
- Malfunction of ETACS-ECU
- Power supply circuit to ETACS-ECU defective
- Malfunction of the LDW-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting 
). On completion, go to Step 2.
STEP 2. M.U.T.-III other system diagnosis code
Check again if the diagnosis code is set in the ETACS-ECU.
Q.
Is the diagnosis code set?
Diagnose the ETACS-ECU (Refer to ).
Go to Step 3.
STEP 3. Check the M.U.T.-III Diagnosis code for other systems
Check if a diagnosis code, which relates to CAN communication-linked systems below, is set.
Combination meter
- Code No. U0141: ETACS CAN timeout
Q.
Is the diagnosis code set?
Go to Step 4.
Go to Step 5.
STEP 4. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the LDW-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check if diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the ETACS-ECU.
The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the ETACS-ECU and the LDW-ECU (GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction).
STEP 5. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the LDW-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check if diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the LDW-ECU.
The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the ETACS-ECU and the LDW-ECU (GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction).