Code No.U1190 No receive fault detect signal
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Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
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ETACS-ECU sends the diagnosis code (U code) detection permission or prohibition signal to each ECU connected to the CAN bus line. If the CAN box unit cannot receive the diagnosis code (U code) detection permission or prohibition signal for 5 seconds after turning the electric motor switch to ON position, diagnosis code U1190 will be set.
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- Malfunction of the ETACS-ECU
- Malfunction of CAN bus line
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STEP 1. M.U.T.-III CAN bus diagnostics
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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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Go to Step 2.
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Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 3.
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STEP 2. Check whether the diagnosis code is set again.
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Check again if the diagnosis code is set in the CAN box unit.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
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(3)On completion, check that the diagnosis code is set again.
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Q.
Is the diagnosis code set?
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Replace the ETACS-ECU. (Refer to GROUP 54A - ETACS .) Then go to Step 3.
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The procedure is complete.
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STEP 3. Check whether the diagnosis code is set again.
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Recheck if the diagnosis code is set in the CAN box unit.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
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(3)On completion, check that the diagnosis code is set again.
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Q.
Is the diagnosis code set?
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Return to Step 1.
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The procedure is complete.
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