Diagnostic procedure
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STEP
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INSPECTION
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ACTION
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|---|---|---|---|
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1
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• Turn the ignition switch to the ACC position.
• Does the display screen change from blank to NAVI mode when pressing the joystick of the car-navigation control switch?
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Yes
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The system is normal.
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No
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Go to the next step.
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2
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• Does the display screen change to NAVI mode when pressing the POS button for approx. 2 s or more?
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Yes
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Go to the next step.
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No
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Go to Step 4.
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3
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• Turn the ignition switch to the LOCK position.
• Remove the car-navigation unit. (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
• Inspect the car-navigation unit connector (24-pin).
• Disconnect the car-navigation unit connector (24-pin).
• Inspect both car-navigation unit connector and wiring harness-side connector for poor connection (such as damaged/pulled-out pins, corrosion).
• Are all the pins normal?
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Yes
|
Replace car-navigation unit. (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
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No
|
If poor connection of car-navigation unit connector:
Securely connect the car-navigation unit connector.
If the car-navigation unit connector is wrong:
Replace the car-navigation unit. (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
If the wiring harness-side connector is wrong:
Repair or replace the pins and/or the connector.
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4
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• Turn the ignition switch to the LOCK position.
• Remove the LCD unit. (See LCD UNIT REMOVAL/INSTALLATION.)
• Inspect the LCD unit connector (24-pin).
• Disconnect the LCD unit connector (24-pin).
• Inspect both LCD unit connector and wiring harness-side connector for poor connection (such as damaged/pulled-out pins, corrosion).
• Are all the pins normal?
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Yes
|
Replace the LCD unit. (See LCD UNIT REMOVAL/INSTALLATION.)
|
|
No
|
If poor connection of LCD unit connector:
Securely connect the LCD unit connector.
If the LCD unit connector is wrong:
Replace the LCD unit. (See LCD UNIT REMOVAL/INSTALLATION.)
If the wiring harness-side connector is wrong:
Repair or replace the pins and/or the connector.
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