PROCEDURE
1. CONFIRM MODEL
(a) Choose the model to be inspected.
Result:
B -- PERFORM MOST LINE CHECK
A -- Continue to next step.
2. CONFIRM SYMPTOMS
(a) Engine switch off.
(b) Turn the engine switch on (ACC) and check if the audio system activates and if the speakers operate.
HINT
* Choose a source such as radio so that sound can be output from the speakers.
* If sound from the speakers is low, turn up the volume.
Result:
HINT
* If a short occurs in a speaker circuit, the sound from the corresponding speaker will be low or almost impossible to hear. If the
volume is turned up in this situation, to prevent excessive current flow due to the short circuit, the stereo component amplifier
assembly stops operating when its output exceeds a certain level. When the operation of the stereo component amplifier
assembly stops, the navigation system will not function normally. This is because MOST communication will stop due to the
shut down of the amplifier causing an error in the MOST network. The stereo component amplifier assembly will start
operating again when the engine switch is turned off and back on (ACC) again. However, the amplifier will stop operating
again if its output exceeds a certain level.
* When the stereo component amplifier assembly stops operating and a malfunction occurs in the navigation system due to a
short in a speaker circuit, this DTC will be stored. In this case, check each speaker circuit and repair or replace
malfunctioning parts, and then recheck for DTCs.
B -- PERFORM MOST LINE CHECK
A -- GO TO AUDIO AND VISUAL SYSTEM (w/ Navigation System) See: Accessories and Optional Equipment/Radio, Stereo,
and Compact Disc/Testing and Inspection/Component Tests and General Diagnostics/Audio and Visual System (w/ Navigation
System)/Speaker Circuit/Up to 08/2009
1. PERFORM MOST LINE CHECK
(a) Display the "MOST Line Check" screen See: Accessories and Optional Equipment/Navigation System/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Navigation System (for HDD).
(b) Check the result on the "MOST Line Check" screen.
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