Code No. C1707:
Implausible coding data
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- If there is any
problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis,
diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table
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- Whenever ECU is replaced, ensure that the CAN bus lines are normal.
- When diagnosis code No.C1707 is set in electric parking brake ECU, the diagnosis code
may also be set in ETACS-ECU. When the diagnosis code is set in ETACS-ECU, carry out the diagnosis
of the diagnosis code for ETACS-ECU first.
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DIAGNOSIS CODE SET CONDITIONS
When received invalid coding data from the ETACS-ECU, this diagnosis code is set.
PROBABLE CAUSES
- The CAN bus line is defective.
- Malfunction of ETACS-ECU coding data
- Malfunction of ETACS-ECU
- ETACS-ECUs have been interchanged between two vehicles.
- Malfunction of the electric parking brake ECU
- Electric parking brake ECUs have been interchanged between two vehicles.
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STEP 1. M.U.T.-III CAN bus diagnostics
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Use 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 3.
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 Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
On completion, go to Step 2.
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STEP 2. Diagnosis code recheck after resetting CAN bus lines
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Q.
Is diagnosis code No.C1707 set?
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Go to Step 3.
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This diagnosis is complete.
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STEP 3. ETACS-ECU coding data check
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Refer to GROUP 00 - Coding List .
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- Item: Auto release type for EPB
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OK: Type 2 <4N1>, Type 4 <4B1>, Type 8 <6B3>
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Q.
Is the check result normal?
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Go to Step 4.
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Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU).
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STEP 4. Check whether the diagnosis code is set again.
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Check again if the diagnosis code is set.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)Turn the ignition switch to the ON position.
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(4)Check if the diagnosis code is set.
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Q.
Is diagnosis code No. C1707 set?
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Replace the electric parking brake ECU (Refer to ).
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The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction).
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