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NO.6 CAR-NAVIGATION CONTROL SWITCH IS INOPERATIVE.

id0903e8802200

6 | Car-navigation control switch is inoperative.
POSSIBLE CAUSE | • Car-navigation control switch malfunction • Open or short circuit in the wiring harness (remote control signal) • Poor connection of the car-navigation control switch connector, terminal damage • Poor connection of the LCD unit connector, terminal damage • LCD unit malfunction Note • The car-navigation control switch is inoperatiove if the following circuit is malfunctioning: - LCD unit connector (24-pin) I (SI01) -car-navigation unit (24-pin) N (SI01) - LCD unit connector (24-pin) K (SI02) -car-navigation unit (24-pin) P (SI02) • When the ignition switch is turned OFF, then ACC position, display screen changes to black.

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Are the switches only partly inoperative? | Yes | Replace the car-navigation control switch.
No | Go to the next step.
2 | • Turn the ignition switch to the LOCK position. • Remove the car-navigation control switch and inspect the connection of the car-navigation control switch connector (6-pin). • Is the connector securely connected? | Yes | Go to the next step.
No | Securely connect the car-navigation control switch connector (6-pin).
3 | • Turn the ignition switch to the LOCK position. • Disconnect the car-navigation control switch connector (6-pin). • Inspect both the car-navigation control switch and wiring harness-side connector for poor connection (such as damaged/pulled-out pins, corrosion). • Are all the pins normal? | Yes | Go to the next step.
No | If the car-navigation control switch side connector is wrong: Replace the car-navigation control switch. If the wiring harness-side connector is wrong: Repair or replace the pins and/or the connector.
4 | • Remove the LCD unit. (See LCD UNIT REMOVAL/INSTALLATION.) • Inspect the car-navigation unit connector (24-pin). • Is the connector securely connected? | Yes | Go to the next step.
No | Securely connect the LCD unit connector.
5 | • Disconnect the LCD unit connector (6-pin). • Inspect both the LCD unit and wiring harness-side connector for poor connection (such as damaged/pulled-out pins, corrosion). • Are all the pins normal? | Yes | Go to the next step.
No | If the LCD unit side connector is wrong: Replace LCD unit. (See LCD UNIT REMOVAL/INSTALLATION.) If the wiring harness-side connector is wrong: Repair or replace the pins and/or the connector.
6 | • Turn the ignition switch to the LOCK position. • Disconnect the LCD unit connector (6-pin). • Disconnect the car-navigation control switch connector (6-pin). • Inspect for continuity between car-navigation control switch wiring harness-side connector terminal E and the LCD unit wiring harness-side connector terminal E. • Is there continuity? | Yes | Inspect for short circuit in the wiring harness. If there is a short circuit, repair or replace the suspect wiring harness. If the wiring harness is OK, then go to the next step.
No | Repair or replace the suspect wiring harness.
7 | • Connect the LCD unit connector (6-pin). • Turn the ignition switch to the ON position. • Inspect the voltage between the car-navigation control switch wiring harness-side connector terminal B (power) and E (P.GND). • Is the voltage B+? | Yes | Replace the car-navigation control switch.
No | Go to the next step.
8 | • Turn the ignition switch to the LOCK position. • Disconnect the LCD unit connector (6-pin). • Turn the ignition switch to the ON position. • Inspect the voltage between connector (6-pin) terminal A (power) and body GND. • Is the voltage B+? | Yes | Inspect the car-navigation control switch wiring harness (power supply). Repair or replace the wiring harness.
No | Replace LCD unit. (See LCD UNIT REMOVAL/INSTALLATION.)