Inspection procedure
B-2: Turn-signal Lamp Operation Sound Function does not Work Normally.
caution
Whenever the ECU
is replaced, ensure that the input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates this function in accordance with the input signals below.
Ignition switch (IG1)
Turn-signal lamp switch
Hazard warning lamp switch
If this function does not work normally, these input signal circuit(s) or the ETACS-ECU
may be defective.
PROBABLE CAUSES
Malfunction of the column switch
Malfunction of the hazard warning lamp switch
Malfunction of the ETACS-ECU
Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Check of adjustment details for the turn-signal
lamp operation sound function
Check that the turn-signal lamp operation sound function is set to "Operation" using the
customisation function of M.U.T-III.
Q.
Is the check result normal?
Go to Step 2.
Using the customisation function of M.U.T-III, set the turn-signal lamp operation
sound function to "Operation."
STEP 2. M.U.T.-III diagnosis code.
When the ignition switch is turned to the "LOCK" (OFF) position, check that the ETACS-ECU
does not set the diagnosis code.
Q.
Is the diagnosis code set?
Refer to diagnosis code chart .
Go to Step 3.
STEP 3. Hazard warning lamps illumination check
When the hazard warning lamp switch is operated, check that the hazard warning lamps flash.
Q.
Is the check result normal?
Go to Step 4.
Refer to Inspection Procedure 1 "The hazard warning lamps do not illuminate ."
STEP 4. Retest the system.
Check that the turn-signal lamp operation sound function works normally.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How
to use Troubleshooting/inspection Service Points -
How to Cope with Intermittent
Malfunction ).