Audio and Visual System (w/o Multi-display)

AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/o Multi-display): 74-40: Short in Speaker Circuit

DTC 74-40 - Short in Speaker Circuit

DESCRIPTION





WIRING DIAGRAM









INSPECTION PROCEDURE
HINT: After the inspection is completed, clear the DTCs.

PROCEDURE

1. CHECK DTC
(a) Disconnect the F3 and F4 amplifier connectors.
(b) Clear the DTCs.
(c) Check if DTC 74-40 is output.
OK:
DTC 74-40 is not output.
NG -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY
OK -- Continue to next step.
2. CHECK DTC
(a) Reconnect the F4 amplifier connector.
(b) Clear the DTCs.
(c) Check if DTC 74-40 is output.
OK:
DTC 74-40 is not output.
NG -- CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKER)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKER)





(a) Disconnect the F3 amplifier connector.
(b) 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.
4. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY





(a) Disconnect the I1 and I10 speaker connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE FRONT NO. 1 SPEAKER ASSEMBLY
OK -- Continue to next step.
5. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY





(a) Disconnect the F6 speaker connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE FRONT NO. 4 SPEAKER ASSEMBLY
OK -- Continue to next step.
6. INSPECT REAR HEADER SPEAKER ASSEMBLY LH





(a) Disconnect the S9 speaker connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE REAR HEADER SPEAKER ASSEMBLY LH
OK -- Continue to next step.
7. INSPECT NO. 1 WOOFER BOX SPEAKER ASSEMBLY





(a) Disconnect the L4 speaker connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE NO. 1 WOOFER BOX SPEAKER ASSEMBLY
OK -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY
8. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKER)





(a) Disconnect the F4 amplifier connector.
(b) 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.
9. INSPECT REAR HEADER SPEAKER ASSEMBLY RH





(a) Disconnect the S8 speaker connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE REAR HEADER SPEAKER ASSEMBLY RH
OK -- Continue to next step.
10. INSPECT REAR SPEAKER SET





(a) Disconnect the J8 and J1 speaker connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE REAR SPEAKER SET
OK -- Continue to next step.
11. CHECK REAR NO. 3 SPEAKER ASSEMBLY
(a) Disconnect the J9 and J2 speaker connectors.
(b) Interchange the rear No. 3 speaker LH with RH.
(c) Check that the malfunction disappears.
OK:
Malfunction disappears.
HINT:
- Connect all the connectors to the rear No. 3 speakers.
- When there is a possibility that either the right or left rear speaker is defective, inspect by interchanging the right one with the left one.
- Perform the inspection above on both the LH and RH sides.

NG -- CHECK HARNESS AND CONNECTOR (REAR SPEAKER SET - REAR NO. 3 SPEAKER)
OK -- REPLACE REAR NO. 3 SPEAKER ASSEMBLY
12. CHECK HARNESS AND CONNECTOR (REAR SPEAKER SET - REAR NO. 3 SPEAKER)





(a) Disconnect the J9, J2, J8 and J1 speaker connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for LH





for RH





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
13. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY





(a) Disconnect the F8 and F7 speaker connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE FRONT NO. 2 SPEAKER ASSEMBLY
OK -- Continue to next step.
14. CHECK FRONT NO. 3 SPEAKER ASSEMBLY
(a) Disconnect the F14 and F13 speaker connectors.
(b) Interchange the front No. 3 speaker LH with RH.
(c) Check that the malfunction disappears.
OK:
Malfunction disappears.
HINT:
- Connect all the connectors to the front No. 3 speakers.
- When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.
- Perform the inspection above on both the LH and RH sides.

NG -- CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER - FRONT NO. 3 SPEAKER)
OK -- REPLACE FRONT NO. 3 SPEAKER ASSEMBLY
15. CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER - FRONT NO. 3 SPEAKER)





(a) Disconnect the F8, F7, F14 and F13 speaker connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for LH





for RH





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
16. INSPECT NO. 1 WOOFER BOX SPEAKER ASSEMBLY





(a) Disconnect the L4 speaker connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE NO. 1 WOOFER BOX SPEAKER ASSEMBLY
OK -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY