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When the ignition switch is in the LOCK (OFF) position, the combination meter receives door-open signal or communication standby instruction from the ETACS-ECU and keeps CAN communication. If there is a contradiction between these two signals, diagnosis code U1206 will be set.
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Current trouble
- The door switch system of the ETACS-ECU, the ETACS-ECU, or the combination meter may be defective.
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Past trouble
- Carry out diagnosis with particular emphasis on connector(s) or wiring harness between the ETACS-ECU and the door switch, and the power supply system to the ETACS-ECU. For diagnosis procedures, refer to "How to cope with past trouble" (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points
).
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- Damaged harness wires and connectors
- Malfunction of ETACS-ECU
- Malfunction of combination meter
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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 satisfactory?
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Repair the CAN bus lines (Refer to GROUP 54F, Diagnosis - Can Bus Diagnostic Table ). On completion, go to Step 4.
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Check that the ETACS-ECU sets a diagnosis code.
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Q.
Is the diagnosis code set?
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Diagnose SWS. (Refer to GROUP 54B, Troubleshooting or GROUP 54C, Troubleshooting or GROUP 54D, Troubleshooting or GROUP 54E, Troubleshooting .)
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Replace the ETACS-ECU, and then check that the diagnosis code is not reset.
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Q.
Is the check result satisfactory?
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Replace combination meter and then go to step 4.
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Recheck 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 "ON" position.
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(3)Check if the diagnosis code is set.
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Q.
Is the check result satisfactory?
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The procedure is complete.
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