id0903e8910100
| 1 |
Car-navigation system does not start operation. (Display changes to black.) |
|---|---|
|
POSSIBLE CAUSE
|
• Fuse malfunction
• Open or short circuit in car-navigation unit (power supply (B+)) wiring harness
• Open or short circuit in car-navigation unit (power supply (ACC)) wiring harness
• Open or short circuit in car-navigation unit (GND) wiring harness
• Melted or damaged power supply (B+, ACC) related fuse.
• Car-navigation unit malfunction
• Poor connection of car-navigation unit connector, terminal damage
|
Diagnostic procedure
| STEP |
INSPECTION |
ACTION |
|
|---|---|---|---|
|
1
|
• Turn the Ignition switch to ACC position.
• Does the car-navigation system start and display map on screen?
|
Yes
|
Go to Step 6.
|
|
No
|
Go to the next step.
|
||
|
2
|
• Turn the Ignition switch to LOCK position.
• Inspect following fuses.
• Are fuses normal?
|
Yes
|
Go to the next step.
|
|
No
|
If the fuse is melted, inspect the wiring harness for short to ground. Repair or replace the wiring harness, then replace the fuse.
Replace with the appropriate standard fuse.
|
||
|
3
|
• Inspect the connection of the car-navigation unit connectors.
• Are the car-navigation unit connectors connected securely?
|
Yes
|
Go to the next step.
|
|
No
|
Securely connect the car-navigation unit.
|
||
|
4
|
• Disconnect the car-navigation unit connectors.
• Are all the pins normal?
|
Yes
|
Go to the next step.
|
|
No
|
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.
|
||
|
5
|
• Turn the Ignition switch to ACC position.
• Measure the following car-navigation unit connector (24-pin) terminals.
• Are voltages normally?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace malfunctioning wiring harness.
|
||
|
6
|
• Turn the Ignition switch to ON position.
• Does the car-navigation system start and display map on screen?
|
Yes
|
The system is normal.
|
|
No
|
Replace the car-navigation unit.
|
||