INSPECTION PROCEDURE
P-6: The column switch (lighting, turn-signal lamp switch) signal is not
received.
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Whenever the ECU is replaced,
ensure that the input signal circuit is normal.
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COMMENTS ON TROUBLE SYMPTOM
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Input signal from the column switch (lighting,
turn-signal lamp switch) is used to operate
the functions below. If the signal is abnormal, these functions will not
work normally.
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- Lamp reminder function
- Headlamp and tail lamp
- Fog lamp
- Turn signal lamp
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- Malfunction of the column switch
- Damaged harness wires and connectors
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Step 1. Check the vehicle model for which no column switch
(lighting, turn-signal lamp switch) signal is received.
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Q.
Which vehicle model does not input any column switch (lighting,
turn-signal lamp switch)
signal, LHD or RHD?
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<LH drive vehicles> : Go to Step
2.
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<RH drive vehicles> : Go to Step
6.
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Step 2. Check the column switch connector.
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Check that the wiper and washer switch
connector, the lighting switch connector and the
switch body connector are in good condition.
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Q.
Is the check result normal?
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 Go to Step 3.
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 Repair
the defective connector.
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Step 3. Check the column switch (lighting switch and switch
body).
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Refer to GROUP 54A - Column switch  .
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Q.
Is the check result normal?
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Go to Step 4.
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Replace the column switch.
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Step 4. M.U.T.-III diagnosis code
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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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Refer
to diagnosis code chart .
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Go to Step 5.
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Step 5. Retest the system.
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Replace the column switch, and check if the
column switch (lighting and turn-signal lamp
switch) sends signal.
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(1)Replace the column switch.
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(2)Check if the column switch (lighting and turn-signal
switch) sends signal.
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Q.
Is the check result normal?
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The
procedure is complete.
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Replace the ETACS-ECU.
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Step 6. Use the M.U.T.-III to confirm a diagnosis code.
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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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Refer
to diagnosis code chart .
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Go to Step 7.
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Step 7. Retest the system.
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Replace the column switch, and check if the
column switch (lighting and turn-signal lamp
switch) sends signal.
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(1)Replace the column switch.
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(2)Check if the column switch (lighting and turn-signal lamp
switch) sends signal.
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Q.
Is the check result normal?
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The
procedure is complete.
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Replace the ETACS-ECU.
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