DTC 74-40

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM (w/o Multi-display): 74-40: Short in Speaker Circuit
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 R35 and R39 amplifier connectors.

(b) Clear the DTC.

(c) Check if DTC 74-40 is output.

OK:

DTC 74-40 is not output.

NG -- REPLACE STEREO COMPONENT AMPLIFIER Removal
OK -- Continue to next step.

2. CHECK DTC

(a) Reconnect the R35 amplifier connector.

(b) 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 R39 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 LH

(a) Disconnect the N12 speaker connector.





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

Standard resistance:





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

5. INSPECT FRONT NO. 3 SPEAKER

(a) Disconnect the M1 speaker connector.





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

Standard resistance:





NG -- REPLACE FRONT NO. 3 SPEAKER Removal
OK -- Continue to next step.

6. INSPECT STEREO COMPONENT SPEAKER

(a) Disconnect the R20 speaker connector.





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

Standard resistance:





NG -- REPLACE STEREO COMPONENT SPEAKER Removal

OK -- REPLACE STEREO COMPONENT AMPLIFIER Removal

7. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKER)

(a) Disconnect the R35 amplifier connector.





(b) Disconnect the L111 telematics transceiver connector.*

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

Standard resistance:





HINT
*: w/ Manual (SOS) Switch

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

8. INSPECT FRONT NO. 1 SPEAKER RH

(a) Disconnect the N4 speaker connector.





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

Standard resistance:





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

9. INSPECT REAR NO. 1 SPEAKER LH

(a) Disconnect the O21 speaker connector.





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

Standard resistance:





NG -- REPLACE REAR NO. 1 SPEAKER LH Removal
OK -- Continue to next step.

10. INSPECT REAR NO. 1 SPEAKER RH

(a) Disconnect the O10 speaker connector.





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

Standard resistance:





NG -- REPLACE REAR NO. 1 SPEAKER RH Removal
OK -- Continue to next step.

11. INSPECT FRONT NO. 2 SPEAKER LH

(a) Disconnect the L9 speaker connector.





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

Standard resistance:





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

12. INSPECT FRONT NO. 2 SPEAKER RH

(a) Disconnect the L84 speaker connector.





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

Standard resistance:





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

13. CHECK VEHICLE EQUIPMENT

(a) Check if the vehicle is equipped with the Manual (SOS) Switch.

Result





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

14. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - STEREO COMPONENT AMPLIFIER AND FRONT NO. 2 SPEAKER RH)

(a) Disconnect the R35 amplifier connector.





(b) Disconnect the L84 speaker connector.

(c) Disconnect the L111 telematics transceiver connector.

(d) 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.

15. CHECK STEREO COMPONENT AMPLIFIER (OPERATION)

(a) After replacing the stereo component amplifier with a normal one, check that audio can be heard from the front No. 2 speaker RH Removal.

OK:

Audio can be heard.

NG -- REPLACE TELEMATICS TRANSCEIVER Removal

OK -- END (STEREO COMPONENT AMPLIFIER IS DEFECTIVE)