DESCRIPTION When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the security horn to sound at intervals of 0.4 seconds. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Main Body / Active Test. (e) According to the display on the Techstream, perform the Active Test. Main Body
OK: The security horn assembly sounds and stops correctly when operated through the Techstream.
(a) Remove the security horn assembly. Click here (b) Inspect the security horn assembly. Click here
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Remove the main body ECU (multiplex network body ECU). Click here (b) Connect the driver side junction block assembly connectors. (c) Remove the SECURITY HORN relay. (d) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(a) Remove the SECURITY HORN relay. (b) Disconnect the A28 security horn assembly connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Disconnect the 3H driver side junction block assembly connector. (b) Remove the SECURITY HORN relay. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Tundra Service Manual > Navigation System: Poor Sound Quality in All Modes (Low Volume)
PROCEDURE 1. CHECK AUDIO SETTINGS (a) Set treble, middle and bass to the initial values and check that the sound is normal. OK: Malfunction disappears. HINT: Sound quality adjustment measures vary according to the type of amplifier. OK END NG 2. COMPARE WITH ANOTHER VEHICLE OF SAME MODEL (a) Compare ...