Code No.U1190 No receive fault detect signal
caution |
- If diagnosis code No. U1190 is set, diagnose the CAN bus lines.
- When replacing the ECU, always check that the communication circuit is normal.
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JUDGEMENT CRITERIA
ETACS-ECU sends the diagnosis code (U code) detection permission or prohibition signal to each ECU connected to the CAN bus line. If the gateway-ECU cannot receive the diagnosis code (U code) detection permission or prohibition signal for 5 seconds after turning the ignition switch to "ON" position, diagnosis code U1190 will be set.
PROBABLE CAUSES
- Malfunction of the ETACS-ECU
- Malfunction of CAN bus line
- Malfunction of the gateway-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
).
STEP 2. M.U.T.-III other system diagnosis code
Check again if the diagnosis code is set in the EPS-ECU.
Q.
Is the diagnosis code set?
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS).
Go to Step 3.
STEP 3. Diagnosis code recheck
Check again if the diagnosis code is set in the gateway-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 the diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the gateway-ECU (Refer to
).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to cope with Intermittent Malfunction).