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Diagnosis Procedure
1.CHECK CONNECTOR
  1. Turn the ignition switch OFF.
  2. Disconnect the battery cable from the negative terminal.
  3. Check the following terminals and connectors for damage, bend and loose connection (connector side and harness side).
    • Harness connector M69
    • Harness connector B41
Is the inspection result normal?
.
Repair the terminal and connector.
 
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
  1. Disconnect the following harness connectors.
    • AV control unit
    • Harness connectors M69 and B41
  2. Check the continuity between the AV control unit harness connector and the harness connector.
    AV control unit harness connectorHarness connectorContinuity
    Connector No.Terminal No.Connector No.Terminal No.
    M12421M691Existed
    4117Existed
Is the inspection result normal?
.
Repair the main line between the AV control unit and the harness connector M69.
 
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
  1. Disconnect the connector of BOSE speaker amp..
  2. Check the continuity between the harness connector and the BOSE speaker amp. harness connector.
    Harness connectorBOSE speaker amp. harness connectorContinuity
    Connector No.Terminal No.Connector No.Terminal No.
    B411B3722Existed
    1723Existed
Is the inspection result normal?
(Present error)Check CAN system type decision again.
(Past error)Error was detected in the main line between the AV control unit and the BOSE speaker amp..
Repair the main line between the harness connector B41 and the BOSE speaker amp..