Code No.C1707:
Implausible coding data
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caution |
- 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 ).
- Whenever ECU is replaced, ensure that the CAN bus lines are normal.
- When diagnosis code No.C1707 is set in ABS-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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ABS-ECU receives the vehicle information stored in the ETACS-ECU via CAN bus lines.
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DIAGNOSIS CODE SET CONDITIONS
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When received unset coding data from the ETACS-ECU, this diagnosis code is set.
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- Malfunction of ETACS-ECU
- ETACS-ECUs have been interchanged between two vehicles.
- ABS-ECU malfunction
- ABS-ECUs have been interchanged between two vehicles.
- Malfunction of ETACS-ECU coding data
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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. M.U.T.-III other system diagnosis code
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Use M.U.T.-III to check whether any coding-related diagnosis code is set by ETACS-ECU.
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Q.
Is the diagnosis code set?
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Troubleshoot for the relevant diagnosis code.
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Go to Step 4.
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STEP 4. Check part number of ABS-ECU
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Check the part number of ABS-ECU.
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Q.
Is the check result normal?
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Go to Step 5.
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Replace the hydraulic unit (integrated with ABS-ECU) (Refer to ). Then
go to Step 8.
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STEP 5. ETACS-ECU coding data check
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Refer to GROUP 00 - Coding List .
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Q.
Is the check result normal?
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Go to Step 6.
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Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ).
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STEP 6. Check part number of ETACS-ECU
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Check the part number of ETACS-ECU.
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Q.
Is the check result normal?
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Go to Step 7.
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Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ).
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STEP 7. Check whether the diagnosis code is reset.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch to the "OFF" position.
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(3)Turn the ignition switch to the "ON" position.
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(4)Turn the ignition switch to the "OFF" position.
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(5)Turn the ignition switch to the "ON" position.
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(6)Check that the ABS warning lamp goes out.
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Q.
Is diagnosis code No.C1707 set?
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Replace the hydraulic unit (integrated with ABS-ECU) (Refer to ). Then
go to Step 8.
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The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).
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STEP 8. Check whether the diagnosis code is reset.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch to the "OFF" position.
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(3)Turn the ignition switch to the "ON" position.
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(4)Turn the ignition switch to the "OFF" position.
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(5)Turn the ignition switch to the "ON" position.
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(6)Check that the ABS warning lamp goes out.
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Q.
Is diagnosis code No.C1707 set?
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Return to Step 1.
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This diagnosis is complete.
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