Galant L4-2.4L (4G69) (2004)
The ETACS-ECU operates the following equipment and function(s) according to signal from the ignition switch (ACC):
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Windshield wiper and washer
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Interior light automatic shutoff function
The ETACS-ECU receives information on the ignition switch condition (ACC) from the middle-grade multi center display unit via CAN communication.
If the ignition switch (ACC) input signal is incorrect, refer to the appropriate Diagnostic Trouble Code Chart.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the equipment and function(s), which are described in "CIRCUIT OPERATION", do not work normally.
TROUBLESHOOTING HINTS
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The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
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The ETACS-ECU may be defective
DIAGNOSIS
Required Special Tool:
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MB991223: Harness Set
STEP 1. Check ETACS-ECU connector C-219 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q : Is ETACS-ECU connector C-219 in good condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer to Harness Connector Inspection. If the equipment described in "CIRCUIT OPERATION"
works normally, the input signal from the ignition switch (ACC) should be normal.
STEP 2. Check the ignition switch (ACC) line of the power supply circuit to the ETACS-ECU. Measure the voltage at ETACS-ECU connector
C-219.
1. Disconnect ETACS-ECU connector C-219 and measure the voltage available at the junction block side of the connector.
2. Turn the ignition switch to the "ACC" position.