If any of the electrical components do not operate, a fuse may
have blown. If this happens, check and replace the fuses as necessary.
1. Turn the engine switch off. 2. Open the fuse box cover. Engine compartment Push the tab in and lift the cover off.
Under the instrument panel Remove the cover.
3. Remove the fuse with the pullout tool. Only type A fuse can be removed using the pullout tool.
4. Check if the fuse is blown.
Type A and B: Replace the blown fuse with a new fuse of an appropriate amperage rating. The amperage rating can be found on the fuse box cover. Type C: Contact your Toyota dealer. Type A
Type B
Type C
■After a fuse is replaced
■If there is an overload in a circuit The fuses are designed to blow, protecting the wiring harness from damage.
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Toyota Tundra Service Manual > Meter / Gauge System: Last Communication With Navigation ECU (U0163)
DESCRIPTION The combination meter assembly communicates with the navigation receiver assembly via the CAN line. DTC Code DTC Detection Condition Trouble Area U0163 When either of following conditions is detected: IG voltage 10.5 V or more No communication with navigation receiver assembly continues ...