Code No. U1190: No receive fault detect signal
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- 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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DIAGNOSTIC FUNCTION
When the signal from the ETACS-ECU cannot be received, KOS&OSS-ECU sets diagnosis code No.U1190.
JUDGEMENT CRITERIA
Check Conditions
- When all the following conditions are met.
- Power supply mode: ON
- ETACS-ECU system voltage is at 10 to 16 V.
Judgement Criterion
- After the following condition is met, 5,000 ms or more have elapsed.
- CAN signal from the ETACS-ECU cannot be received.
PROBABLE CAUSES
- Malfunction of the CAN bus line
- Malfunction of ETACS-ECU
- Malfunction of KOS&OSS-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 
).
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 GROUP 54A, Troubleshooting ).
Go to Step 3.
STEP 3. M.U.T.-III other system diagnosis code
Check again if the diagnosis code is set in the SRS-ECU.
Q.
Is the diagnosis code set?
Replace the ETACS-ECU.
Go to Step 4.
STEP 4. Diagnosis code recheck
Check again if the diagnosis code is set in the KOS&OSS-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the engine 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 KOS&OSS-ECU and register the ID codes (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to cope with Intermittent Malfunction ).