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If this circuit is defective and
the ignition switch is at the LOCK (OFF) position, the
ETACS-ECU does not work. In this case, the functions below
will be suspended.
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- Lamp reminder function
- Keyless entry system
- Ignition key cylinder illumination lamp
- Headlamp automatic-shutdown function
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However, when the ignition switch
is at the ON position, the functions below will
work.
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- Reading diagnosis code and checking input signal by
M.U.T.-III.
- Central door locking
- Headlamp and tail lamp
- Hazard warning lamp
- Interior lamps
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- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
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![](../../../img/54/AC313421AC00ENG.png)
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Q.
Is the check result normal?
Go to Step
2.
Repair
the defective connector.
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![](../../../img/54/AC313421AC00ENG.png)
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(1)Remove the ETACS-ECU, and
measure at the junction block side.
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![](../../../img/54/AC301541IH00ENG.png)
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(2)Voltage between C-219 ETACS-ECU
connector terminal No.20 and body earth. OK:
System voltage
Q.
Is the check result normal?
Go to Step
4.
Go to Step
3.
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![](../../../img/54/AC313416AH00ENG.png)
![](../../../img/54/AC313414AD00ENG.png)
![](../../../img/54/AC313418AG00ENG.png)
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note |
Prior to the wiring harness
inspection, check joint connector C-31,
intermediate connector
C-125 and junction block connector C-203, and
repair if necessary.
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- Check the power supply line for open
circuit.
Q.
Is the check result normal?
The trouble can be
an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
Repair the wiring
harness.
|
![](../../../img/54/AC313421AC00ENG.png)
|
(1)Remove the ETACS-ECU, and
measure at the junction block side.
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![](../../../img/54/AC310506BE00ENG.png)
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(2)Continuity between C-219
ETACS-ECU connector terminal No.3 and body
earth. OK: 2Ω or less
Q.
Is the check result normal?
Go to Step
6.
Go to Step
5.
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![](../../../img/54/AC313418AF00ENG.png)
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note |
Prior to the wiring harness
inspection, check junction block connector
C-205, and repair
if necessary.
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- Check the earth wires for open circuit.
Q.
Is the check result normal?
The trouble can be
an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
Repair the wiring
harness.
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Check that the battery power supply
circuit to the ETACS-ECU is normal.
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|
Q.
Is the check result normal?
|
|
The trouble can be
an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
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