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ASC-ECU receives the ON signal of the brake fluid level switch in ETACS-ECU via the CAN
bus lines. This indicates that the brake fluid level is lower than the specified.
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This diagnosis code is set when the brake fluid level is lower than the specified.
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- Low brake fluid level
- Brake fluid level switch malfunction
- Brake pad wear
- Damaged wiring harness and connectors
- Malfunction of ETACS-ECU
- ASC-ECU malfunction
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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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Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ).
On completion, go to Step 2.
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Q.
Is the diagnosis code No. C1009 set?
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This diagnosis is complete.
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Check that the brake fluid level is higher than the lower limit.
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Q.
Is the check result normal?
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Add brake fluid as necessary.
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Check that the brake pad is thicker than the limit (Refer to GROUP 35A - On-vehicle
Service ).
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Q.
Is the check result normal?
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Replace the brake pad (Refer to GROUP 35A - On-vehicle Service ).
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(1)Turn the ignition switch to the ON position.
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(2)Measure the voltage between the terminal No. 1 and the body earth. OK: Approximately battery voltage
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Q.
Is the check result normal?
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Q.
Is the check result normal?
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The short circuit between the C-312 ETACS-ECU connector terminal No. 1 and the
A-10 brake fluid level switch connector terminal No. 1 may be present. Repair the wiring harness
between the C-312 ETACS-ECU connector terminal No. 1 and the A-10 brake fluid level switch connector
terminal No. 1.
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Repair the defective connector.
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Refer to GROUP 35A - On-vehicle Service .
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Q.
Is the check result normal?
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Replace the brake fluid level switch.
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- Drive the vehicle at 20 km/h or more.
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Q.
Is the diagnosis code No. 1009 set?
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This diagnosis is complete.
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