Code No. U1190:
No receive fault detect signal
caution |
- If the 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, OSS-ECU sets the 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.
Judgment 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 OSS-ECU
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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 ).
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STEP 2. M.U.T.-III other system diagnosis code
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Check again if the diagnosis code is set to the ETACS-ECU.
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Q.
Is the diagnosis code set?
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Diagnose the ETACS-ECU (Refer to GROUP 54A, Troubleshooting ).
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Go to Step 3.
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STEP 3. M.U.T.-III other system diagnosis code
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Check again if the diagnosis code is set to the SRS-ECU.
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Q.
Is the diagnosis code set?
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Replace the ETACS-ECU.
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Go to Step 4.
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STEP 4. Diagnosis code recheck
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Check again if the diagnosis code is set to the OSS-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the engine switch from the LOCK (OFF) position to the ON position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
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Replace the OSS-ECU.
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Intermittent malfunction is suspected (Refer to GROUP 00 -
How to Use
Troubleshooting/Inspection Service Points -
How to cope with Intermittent Malfunction ).
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