Part 2
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM (W/ Multi-display): Speaker Circuit
Speaker Circuit (Continued)
20. 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
OK -- Continue to next step.
21. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 3 SPEAKER)
(a) Disconnect the M1 speaker connector.
(b) Disconnect the R39 amplifier 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
22. INSPECT FRONT NO. 2 SPEAKER
(a) Disconnect the L9 and L84 speaker connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE FRONT NO. 2 SPEAKER
OK -- Continue to next step.
23. CHECK DEFECTIVE SPEAKER AND VEHICLE EQUIPMENT
(a) Check which side of the vehicle the defective speaker is on. Also, check if the vehicle is equipped with the LEXUS Link System.
Result
B -- CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER)
A -- Continue to next step.
24. CHECK HARNESS AND CONNECTOR (MAYDAY ECU - STEREO COMPONENT AMPLIFIER AND FRONT NO. 2 SPEAKER)
(a) Disconnect the R35 amplifier connector.
(b) Disconnect the L84 speaker connector.
(c) Disconnect the R24 ECU 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.
25. 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 RH side speaker Removal.
OK:
Audio can be heard.
NG -- REPLACE MAYDAY ECU
OK -- END (STEREO COMPONENT AMPLIFIER IS DEFECTIVE)
26. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER)
(a) Disconnect the R35 amplifier connector.
(b) Disconnect the L9 and L84 speaker connectors.
(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
27. INSPECT FRONT NO. 1 SPEAKER
(a) Disconnect the N12 and N4 speaker connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE FRONT NO. 1 SPEAKER
OK -- Continue to next step.
28. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 1 SPEAKER)
(a) Disconnect the R36 amplifier connector.
(b) Disconnect the N12 and N4 speaker connectors.
(c) 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 -- REPLACE STEREO COMPONENT AMPLIFIER
29. CHECK SPEAKER
(a) Check the malfunctioning speakers.
Result
E -- INSPECT STEREO COMPONENT SPEAKER
D -- INSPECT REAR HEADER SPEAKER
C -- INSPECT REAR NO. 2 SPEAKER
B -- INSPECT REAR NO. 1 SPEAKER
A -- Continue to next step.
30. INSPECT REAR NO. 3 SPEAKER
(a) Check that the malfunction disappears when the speaker is replaced with a normal one.
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 LH and RH sides.
Result
C -- REPLACE REAR NO. 3 SPEAKER
B -- REPLACE REAR NO. 3 SPEAKER
A -- Continue to next step.
31. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR NO. 3 SPEAKER)
(a) Disconnect the R35 amplifier connector.
(b) Disconnect the Q8 and Q3 speaker connectors.
(c) 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 -- REPLACE STEREO COMPONENT AMPLIFIER
32. INSPECT REAR NO. 1 SPEAKER
(a) Disconnect the O21 and O10 speaker connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result
C -- REPLACE REAR NO. 1 SPEAKER
B -- REPLACE REAR NO. 1 SPEAKER
A -- Continue to next step.
33. CHECK HARNESS AND CONNECTOR (REAR NO. 3 SPEAKER - REAR NO. 1 SPEAKER)
(a) Disconnect the O21, O10, Q8 and Q3 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 -- REPLACE STEREO COMPONENT AMPLIFIER
34. INSPECT REAR NO. 2 SPEAKER
(a) Disconnect the O12 and O1 speaker connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result
C -- REPLACE REAR NO. 2 SPEAKER
B -- REPLACE REAR NO. 2 SPEAKER
A -- Continue to next step.
35. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR NO. 2 SPEAKER)
(a) Disconnect the R35 and R39 amplifier connector.
(b) Disconnect the O12 and O1 speaker connectors.
(c) 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 -- REPLACE STEREO COMPONENT AMPLIFIER
36. INSPECT REAR HEADER SPEAKER
(a) Disconnect the S18 and R18 speaker connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE REAR HEADER SPEAKER
OK -- Continue to next step.
37. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR HEADER SPEAKER)
(a) Disconnect the R36 amplifier connector.
(b) Disconnect the S18 and R18 speaker connectors.
(c) 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 -- REPLACE STEREO COMPONENT AMPLIFIER
38. 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
OK -- Continue to next step.
39. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - STEREO COMPONENT SPEAKER)
(a) Disconnect the R39 amplifier connector.
(b) Disconnect the R20 speaker 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