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Home >> Lexus Truck >> 2012 >> GX 460 V8-4.6L (1UR-FE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Radio, Stereo, and Compact Disc >> Testing and Inspection >> Component Tests and General Diagnostics >> Audio and Visual System (w/ Multi-Display) >> Speaker Circuit >> Part 1

Part 1





AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/ Multi-display): Speaker Circuit
- Speaker Circuit

DESCRIPTION

The stereo component amplifier assembly sends sound signals to the speaker.

WIRING DIAGRAM













INSPECTION PROCEDURE

PROCEDURE

1. CHECK VEHICLE TYPE

(a) Check the vehicle type.

Result





B -- CHECK SPEAKER
A -- Continue to next step.

2. CHECK SPEAKER

(a) Check which speakers are malfunctioning.

Result





B -- CHECK REAR SIDE SPEAKER

C -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Removal
A -- Continue to next step.

3. CHECK FRONT SIDE SPEAKER

(a) Check which speakers are malfunctioning.

Result





B -- REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

C -- INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

D -- INSPECT FRONT NO. 4 SPEAKER ASSEMBLY
A -- Continue to next step.

4. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

(a) Disconnect the H9*1 and/or H12*2 front No. 1 speaker assembly connector.

*1: for RH

*2: for LH





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER - FRONT NO. 3 SPEAKER)

*1: for RH

*2: for LH

(a) Disconnect the H9*1 and/or H12*2 front No. 1 speaker assembly connector.

(b) Disconnect the H20*1 and/or H21*2 front No. 3 speaker assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

for RH
for LH










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY

(a) Disconnect the H20*1 and/or H21*2 front No. 3 speaker assembly connector.

*1: for RH

*2: for LH





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

for RH
for LH










Text in Illustration





NG -- REPLACE FRONT NO. 3 SPEAKER ASSEMBLY Removal

OK -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Removal

7. REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

(a) Temporarily replace the front No. 3 speaker assembly with a new or normally functioning one Removal.

OK:

Malfunction disappears.

Result





B -- CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 3 SPEAKER)

C -- CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - FRONT NO. 3 SPEAKER)

OK -- END (FRONT NO. 3 SPEAKER ASSEMBLY IS DEFECTIVE)

8. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 3 SPEAKER)

(a) Disconnect the R31 stereo component amplifier assembly connector.

(b) Disconnect the H20*1 and/or H21*2 front No. 3 speaker assembly connector.

*1: for RH

*2: for LH

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

for RH
for LH










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Removal

9. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - FRONT NO. 3 SPEAKER)

(a) Disconnect the G56 telematics transceiver connector.

(b) Disconnect the H20 front No. 3 speaker assembly RH connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

10. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - STEREO COMPONENT AMPLIFIER)

(a) Disconnect the G56 telematics transceiver connector.

(b) Disconnect the R31 stereo component amplifier assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

11. INSPECT TELEMATICS TRANSCEIVER

(a) Remove the telematics transceiver Removal.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPLACE TELEMATICS TRANSCEIVER Removal

OK -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Removal

12. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

(a) Disconnect the J3*1 and/or K2*2 front No. 2 speaker assembly connector.

*1: for RH

*2: for LH





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.

13. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER)

(a) Disconnect the R33 stereo component amplifier assembly connector.

(b) Disconnect the J3*1 and/or K2*2 front No. 2 speaker assembly connector.

*1: for RH

*2: for LH

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

for RH
for LH










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Removal

14. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY

(a) Disconnect the H13 front No. 4 speaker assembly connector.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPLACE FRONT NO. 4 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.

15. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 4 SPEAKER)

(a) Disconnect the R31 stereo component amplifier assembly connector.

(b) Disconnect the H13 front No. 4 speaker assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Removal

16. CHECK REAR SIDE SPEAKER

(a) Check which speakers are malfunctioning.

Result





B -- INSPECT REAR NO. 2 SPEAKER ASSEMBLY

C -- INSPECT REAR HEADER SPEAKER ASSEMBLY

D -- INSPECT NO. 1 SPEAKER WITH BOX ASSEMBLY
A -- Continue to next step.

17. INSPECT REAR SPEAKER ASSEMBLY

(a) Disconnect the L1*1 and/or M1*2 rear speaker assembly connector.

*1: for RH

*2: for LH





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPLACE REAR SPEAKER ASSEMBLY Removal
OK -- Continue to next step.

18. CHECK HARNESS AND CONNECTOR (REAR SPEAKER - REAR NO. 2 SPEAKER)

*1: for RH

*2: for LH

(a) Disconnect the L1*1 and/or M1*2 rear speaker assembly connector.

(b) Disconnect the L3*1 and/or M3*2 rear No. 2 speaker assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

for RH
for LH










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

19. INSPECT REAR NO. 2 SPEAKER ASSEMBLY

(a) Disconnect the L3*1 and/or M3*2 rear No. 2 speaker assembly connector.

*1: for RH

*2: for LH





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPLACE REAR NO. 2 SPEAKER ASSEMBLY Removal

OK -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Removal

20. INSPECT REAR NO. 2 SPEAKER ASSEMBLY

(a) Disconnect the L3*1 and/or M3*2 rear No. 2 speaker assembly connector.

*1: for RH

*2: for LH





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPLACE REAR NO. 2 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.


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