Code No.U1206: Flag invalid

caution

If diagnosis code U1206 is set in the combination meter, diagnose the CAN main bus line.

TROUBLE JUDGMENT

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.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

The door switch system of the ETACS-ECU, the ETACS-ECU, or the combination meter may be defective.

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 ).

PROBABLE CAUSES

Damaged harness wires and connectors
Malfunction of ETACS-ECU
Malfunction of combination meter

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics

Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result satisfactory?

	Go to Step 2.

	Repair the CAN bus lines (Refer to GROUP 54F, Diagnosis - Can Bus Diagnostic Table ). On completion, go to Step 4.

STEP 2. M.U.T.-III diagnosis code

Check that the ETACS-ECU sets a diagnosis code.

Q. Is the diagnosis code set?

	Diagnose SWS. (Refer to GROUP 54B, Troubleshooting or GROUP 54C, Troubleshooting or GROUP 54D, Troubleshooting or GROUP 54E, Troubleshooting .)

	Go to Step 3.

STEP 3. Replace the ETACS-ECU and then recheck the diagnosis code.

Replace the ETACS-ECU, and then check that the diagnosis code is not reset.

Q. Is the check result satisfactory?

	Go to Step 4.

	Replace combination meter and then go to step 4.

STEP 4. Check whether the diagnosis code is reset.

Recheck if the diagnosis code is set.

(1)Erase the diagnosis code.

(2)Turn the ignition switch to "ON" position.

(3)Check if the diagnosis code is set.

Q. Is the check result satisfactory?

	The procedure is complete.

	Go to Step 1.