Tundra 4WD V8-5.7L (3UR-FE) (2007)
Horn Relay: Testing and Inspection
ON-VEHICLE INSPECTION
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
NOTE:
-
Some systems need to be initialized after the cable is reconnected.
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After the ignition switch is turned OFF, the navigation system requires approximately 90 seconds to record various types of memory and
settings. As a result, after turning the ignition switch OFF, wait 90 seconds or more before disconnecting the cable from the negative (-)
battery terminal.
2. REMOVE INTEGRATION RELAY (UNIT E)
a. Remove the engine room relay block cover.
b. Using a screwdriver, detach the 2 claws and disconnect the integration relay from the engine room relay block.
HINT: Tape the screwdriver tip before use.
c. Disconnect the 3 connectors.
3. INSPECT INTEGRATION RELAY (HORN RELAY)
NOTE: