Code No.01 Trouble in SWS Communication Line System or
ETACS-ECU
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If diagnosis code No.01 is set in the ETACS-ECU,
diagnose the CAN bus lines.
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The ETACS-ECU communicates with the column
switch, the front-ECU, the sunroof motor assembly and the power window main
switch <Vehicles for South Africa> through the SWS
communication line. If there is any trouble in the ETACS-ECU or the SWS
communication lines, diagnosis code No.01 will be set.
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COMMENT ON TROUBLE SYMPTOM
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The wiring harness wire or connectors may have
loose, corroded, or damage terminals, or terminals pushed back in the
connector, or the ETACS-ECU may be defective.
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- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
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STEP 1. M.U.T.-III CAN bus diagnostics
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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 normal?
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 Go to Step 2.
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 Repair
the CAN bus line (Refer to GROUP 54D - Troubleshooting  ).
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STEP 2. Check the following connectors.
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Check the following connectors:
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- D-420 ETACS-ECU connector
- D-311 Column switch connector
- A-09X Front-ECU connector
- E-03 Sunroof motor assembly connector
- F-02 Power window main switch connector <Vehicles for South
Africa>
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Q.
Are all the connectors in good condition?
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Go to Step 3.
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Repair
the defective connector
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STEP 3. Check the following wiring harness.
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Check the wiring harness between the following
connectors:
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- Wiring harness from D-420 ETACS-ECU connector terminal No.59 to D-311
column switch connector terminal No.3
- Wiring harness from D-420 ETACS-ECU connector terminal No.59 to A-09X
front-ECU connector terminal No.22
- Wiring harness from D-420 ETACS-ECU connector terminal No.59 to E-03
sunroof motor assembly connector terminal No.10
- Wiring harness from D-420 ETACS-ECU connector terminal No.59 to F-02
sunroof motor assembly connector terminal No.4 <Vehicles for South
Africa>
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| note |
Prior to the wiring harness inspection, check
intermediate connectors D-114 <Vehicles for South Africa>,
D-130 and D-241, and repair if necessary.
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Q.
Are all the wiring harness wires in good condition?
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Go to Step 4.
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Repair
the wiring harness.
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STEP 4. Check whether the diagnosis code is reset.
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Check again if the diagnosis code is
set.
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(1)Erase the diagnosis code.
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(2)Ignition switch: LOCK (OFF) position to ON
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(3)On completion, check that the diagnosis code is not
reset.
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Q.
Is the check result normal?
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If a
trouble is solved, it is determined that there is an intermittent
malfunction such as poor engaged connector(s) or open circuit (Refer to
GROUP 00 - How to use troubleshooting/Inspection Service Points
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Replace the ETACS-ECU.
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