Inspection Procedure C-2: The ignition switch (IG1) signal is not
received.
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![](../../../img/54/AC607567AV00ENG.png)
![](../../../img/54/AC607609AW00ENG.png)
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![](../../../img/54/AC607610AC00ENG.png)
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caution |
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 ignition switch (IG1) 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
- Door-ajar warning buzzer function
- Turn-signal lamp operation sound function
- Power window
- Ignition key cylinder illumination lamp
- Seat belt reminder function
- Head and tail lamps
- Rear fog lamp
- Turn signal lamp
- Interior lamps
- Interior lamp automatic-shutdown function
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- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
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STEP 1. Connector check: D-419 ETACS-ECU connector
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Q.
Is the check result normal?
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Go to Step 2.
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Repair
the defective connector.
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STEP 2. Voltage measurement at the D-419 ETACS-ECU
connector.
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(1)Remove the ETACS-ECU, and measure at the junction block
side.
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(2)Ignition switch: ON position
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(3)Voltage between D-419 ETACS-ECU connector terminal No.8
and body earth OK: System voltage
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Q.
Is the check result normal?
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Go to Step 4.
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Go to Step 3.
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STEP 3. Check the wiring harness between D-419 ETACS-ECU connector
terminal No.8 and the ignition switch (IG1).
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note |
Prior to the wiring harness inspection, check
junction block connector D-403, and repair if necessary.
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- Check the power supply line for open circuit.
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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 use troubleshooting/Inspection Service Points ).
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Repair
the wiring harness.
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STEP 4. Retest the system.
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Check that the ignition switch (IG1) signal is
received normally.
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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 use troubleshooting/Inspection Service Points ).
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Replace the ETACS-ECU.
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