Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001CIY003X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Stereo Amplifier has Power but does not Operate; 2007 MY LX470 [08/2006 -        ]

Stereo Amplifier has Power but does not Operate

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK CASSETTE TAPE PLAYER

(a) Is cassette tape player operating normally?

OK

REPLACE RADIO RECEIVER ASSEMBLY

NG

2.

INSPECT FUSE (ACC, RADIO, AMP)

(a) Remove the ACC fuse from the cowl side junction block LH.

(b) Remove the RADIO fuse from the cowl side junction block RH.

(c) Remove the AMP fuse from the engine room junction block.

(d) Measure the resistance of the fuses.

Standard resistance:

Below 1Ω

NG

REPLACE FUSE

OK

3.

CHECK WIRE HARNESS (STEREO AMPLIFIER - BATTERY AND BODY GROUND)
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

4.

CHECK WIRE HARNESS (RADIO RECEIVER ASSEMBLY - BATTERY AND BODY GROUND)
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

5.

REPLACE SPEAKER

(a) Temporarily install another speaker. Functions OK?

OK

SPEAKER FAULTY

NG

6.

CHECK NOISE

(a) Is hiss noise from speaker?

OK:

Hiss noise is not from speaker.

NG

REPLACE STEREO AMPLIFIER (RECHECK SYSTEM AFTER REPLACEMENT)

OK

REPLACE RADIO RECEIVER ASSEMBLY (RECHECK SYSTEM AFTER REPLACEMENT)