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It is suspected that the power
supply circuit to the ETACS-ECU is defective, or the wiring
harness between the SWS monitor and the ETACS-ECU or their
connector(s) is damaged. If the battery
power supply circuit to the ECU (terminal No.20 of the
ETACS-ECU) is damaged, also check the
power supply circuit from the ignition switch (IG1)
(terminal No.8 of the ETACS-ECU), and repair
if necessary. If the earth circuit to the ECU (terminal No.3
of the ETACS-ECU) is defective,
also check the earth circuit to the sensor (terminal No.56
of the ETACS-ECU), and repair if
necessary.
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- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
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![](../../../img/54/AC313400AC00ENG.png)
![](../../../img/54/AC313410AC00ENG.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/AC313400AC00ENG.png)
![](../../../img/54/AC313410AC00ENG.png)
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(1)Remove the ETACS-ECU, and
measure at the junction block side.
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![](../../../img/54/AC310507BP00ENG.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/AC313406AF00ENG.png)
![](../../../img/54/AC313393AI00ENG.png)
![](../../../img/54/AC313404AK00ENG.png)
![](../../../img/54/AC313398AH00ENG.png)
![](../../../img/54/AC313408AH00ENG.png)
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note |
Prior to the wiring harness
inspection, check joint connectors C-32
<LH drive
vehicles>, C-31 <RH drive
vehicles>, 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.
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![](../../../img/54/AC313400AC00ENG.png)
![](../../../img/54/AC313410AC00ENG.png)
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(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)Resistance between C-219
ETACS-ECU connector terminal No.3 and body
earth OK: 2 Ω or less
Q.
Is the check result normal?
Go to Step
6.
Go to Step
5.
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![](../../../img/54/AC313398AC00ENG.png)
![](../../../img/54/AC313408AC00ENG.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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![](../../../img/54/AC313400AB00ENG.png)
![](../../../img/54/AC313410AB00ENG.png)
![](../../../img/54/AC310153AB00ENG.png)
![](../../../img/54/AC310183AB00ENG.png)
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Q.
Is the check result normal?
Go to Step
7.
Repair
the defective connector.
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![](../../../img/54/AC313392AG00ENG.png)
![](../../../img/54/AC313406AL00ENG.png)
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note |
Prior to the wiring harness
inspection, check joint connector C-01, and
repair if necessary.
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- Check the communication lines for open
circuit.
Q.
Is the check result normal?
Go to Step
8.
Repair
the wiring harness.
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OK: "OK" is displayed on
the "ETACS ECU" menu.
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Q.
Is the check result normal?
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The trouble can be
an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
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