System Is Reset

Probable cause:

Influence by external devices, power supply circuit malfunction, unit body malfunction

Wiring diagram:

Audio and navigation system Refer to WIRING SYSTEM>Audio and Navigation System>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Refer to COCKPIT CONTROL (DIAGNOSTICS)>General Description>CAUTION .

CHECK ENVIRONMENTAL CONDITION .
Check if any external devices which emit strong electromagnetic waves and noises, such as a radio antenna, is installed inside the vehicle.

Is the check result OK?

Yes : Go to 2.

No : Remove the external device to check the operation. If the fault is not fixed: Go to 2.
CHECK CONNECTOR CONNECTION .
Check that the connector is connected to the unit.

Is the check result OK?

Yes : Go to 3.

No : Connect the connector.
CHECK CONNECTOR .
Check for poor contact of connectors or terminals.

Is the check result OK?

Yes : Go to 4.

No : Repair or replace the harness.
CHECK POWER SUPPLY VOLTAGE .
1. Turn the ignition switch to ACC.
2. Using the tester, measure the voltage between cockpit control module connector (i 102) and chassis ground.
  NOTE: Turn the electrical parts to OFF.
  
  Connector & terminal
  
  (il02) No. 3 (+) - Chassis ground (-):
  
  (il02) No. 4 (+) - Chassis ground (-):
Is the voltage 12 V or more?

Yes : Go to 8.

No : Go to 5.
CHECK OPEN CIRCUIT IN HARNESS (POWER SUPPLY) .
Using the tester, measure the voltage between cockpit control module connector (i 102) and chassis ground while shaking the harness.

Connector & terminal

(il02) No. 3 (+) - Chassis ground (-):

(il02) No. 4 (+) - Chassis ground (-):

Is the voltage 12 V or more?

Yes : Go to 6.

No : Repair or replace the open circuit of harness.
CHECK OPEN CIRCUIT IN HARNESS (GROUND) .
Using the tester, measure the resistance between cockpit control module connector (il02) and chassis ground while shaking the harness.

Connector & terminal

(il02) No. 7 - Chassis ground:

Is the resistance 1 Ω or less?

Yes : Go to 7.

No : Repair or replace the open circuit of harness.
CHECKBATTERY.
Check the battery. Refer to STARTING/CHARGING SYSTEMS (H4DOTC)>BATTERY . Refer to STARTING/CHARGING SYSTEMS (H4DO)>BATTERY .

Is the check result OK?

Yes : Go to 8.

No : Replace the cockpit control module. Refer to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY .
CHECK UNIT OPERATION .
1. Connect all connectors.
2. Turn the ignition switch to ACC and the power supply switch of the unit to ON.
Is the reset eliminated?

Yes : Currently no failure is found.

No : Go to 9.
CHECK SOFTWARE VERSION .
Check the firmware of the cockpit control module.

Is the firmware the latest?

Yes : Replace the cockpit control module. Refer to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY .

No : Update the firmware to the latest and reproduce the failure, and then perform the diagnosis again.