Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

Check microphone.
1. NG: Replace microphone (See HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION ).
2. OK: Go to next step.
Check overhead J/B (See INSPECTION ).
1. NG: Replace overhead J/B (See HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION ).
2. OK: Go to next step.
Check wire harness between overhead J/B (microphone) and navigation ECU.
PREPARATION:

Disconnect the overhead J/B and navigation ECU connectors.

CHECK:

Check continuity of the wire harness between terminals of the overhead J/B and those of the navigation ECU.

OK:

Continuity
1. NG: Replace or repair wire harness or connector.
2. OK: Check and replace navigation ECU.