Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

CHECK SPEAKER

Check the malfunctioning speakers

Result

RESULT CHART

Result	Proceed to
Malfunction in front speaker area	A
Malfunction in rear speaker area	B

B: Go to step 12

A: Go to next step

CHECK SPEAKER

Check the malfunctioning speakers

Result

RESULT CHART

Result	Proceed to
Front No 3 speaker	A
Front No 2 speaker	B
Front No 1 speaker	C

B: Go to step 5

C: Go to step 10

A: Go to next step

INSPECT FRONT NO. 3 SPEAKER

Disconnect the M1 speaker connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 - 2	Always	5 to 7 Ω

Fig 1: Identifying Front No. 3 Speaker Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT NO. 3 SPEAKER (See REMOVAL )

OK: Go to next step

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

Disconnect the M1 speaker connector
Disconnect the R39 amplifier connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R39-3 (CTR+) - M1-1	Always	Below 1 Ω
R39-9 (CTR-) - M1-2	Always	Below 1 Ω
R39-3 (CTR+) - Body ground	Always	10 kΩ or higher
R39-9 (CTR-) - Body ground	Always	10 kΩ or higher

Fig 2: Checking Harness And Connector (Stereo Component Amplifier - Front No. 3 Speaker)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE STEREO COMPONENT AMPLIFIER (See REMOVAL )

INSPECT FRONT NO. 2 SPEAKER

Disconnect the L9 and L84 speaker connectors

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 - 2	Always	5 to 7 Ω

Fig 3: Identifying Front No. 2 Speaker Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT NO. 2 SPEAKER (See INSPECTION )

OK: Go to next step

CHECK DEFECTIVE SPEAKER AND VEHICLE EQUIPMENT

Check which side of the vehicle the defective speaker is on. Also, check if the vehicle is equipped with the LEXUS Link System.

Result

RESULT CHART

Result	Proceed to
Defective speaker is on right side (with LEXUS Link System)	A
Defective speaker is on right side (without LEXUS Link System)	B
Defective speaker is on left side	B

B: Go to step 9

A: Go to next step

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

Disconnect the R35 amplifier connector
Disconnect the L84 speaker connector
Disconnect the R24 ECU connector

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
L84-1 (TWR+) - R24-2 (SPO+)	Always	Below 1 Ω
L84-2 (TWR-) - R24-3 (SPO-)
R35-8 (FR+) - R24-10 (SPI+)
R35-7 (FR-) - R24-11 (SPI-)
L84-1 (TWR+) - Body ground	Always	10 kΩ or higher
L84-2 (TWR-) - Body ground
R35-8 (FR+) - Body ground
R35-7 (FR-) - Body ground

Fig 4: Checking Harness And Connector (Mayday ECU - Stereo Component Amplifier And Front No. 2 Speaker)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK STEREO COMPONENT AMPLIFIER (OPERATION)
1. After replacing the stereo component amplifier with a normal one, check that audio can be heard from the front RH side speaker (see REMOVAL )
  OK: Audio can be heard.
NG: REPLACE MAYDAY ECU (See REMOVAL )

OK: END (STEREO COMPONENT AMPLIFIER IS DEFECTIVE)

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

Disconnect the R35 amplifier connector.
Disconnect the L9 and L84 speaker connectors

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R35-2 (FL+) - L9-1	Always	Below 1 Ω
R35-6 (FL-) - L9-2
R35-8 (FR+) - L84-1
R35-7 (FR-) - L84-2
R35-2 (FL+) - Body ground	Always	10 kΩ or higher
R35-6 (FL-) - Body ground
R35-8 (FR+) - Body ground
R35-7 (FR-) - Body ground

Fig 5: Checking Harness And Connector (Stereo Component Amplifier - Front No. 2 Speaker)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE STEREO COMPONENT AMPLIFIER (See REMOVAL ).

INSPECT FRONT NO. 1 SPEAKER

Disconnect the N12 and N4 speaker connectors.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 - 2	Always	11 to 13 Ω

Fig 6: Identifying Front No. 1 Speaker Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT NO. 1 SPEAKER (See REMOVAL )

OK: Go to next step

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 1 SPEAKER)

Disconnect the R36 amplifier connector.
Disconnect the N12 and N4 speaker connectors.

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

Standard resistance:

for LH

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R36-10 (WFL+) - N12-1	Always	Below 1 Ω
R36-8 (WFL-) - N12-2	Always	Below 1 Ω
R36-10 (WFL+) - Body ground	Always	10 kΩ or higher
R36-8 (WFL-) - Body ground	Always	10 kΩ or higher

for RH

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R36-5 (WFR+) - N4-1	Always	Below 1 Ω
R36-11 (WFR-) - N4-2	Always	Below 1 Ω
R36-5 (WFR+) - Body ground	Always	10 kΩ or higher
R36-11 (WFR-) - Body ground	Always	10 kΩ or higher

Fig 7: Checking Harness And Connector (Stereo Component Amplifier - Front No. 1 Speaker)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE STEREO COMPONENT AMPLIFIER (See REMOVAL )

CHECK SPEAKER

Check the malfunctioning speakers.

Result

RESULT CHART

Result	Proceed to
Rear No 3 speaker	A
Rear No 1 speaker	B
Rear No 2 speaker	C
Rear header speaker	D
Stereo component speaker	E

B: Go to step 15

C: Go to step 17

D: Go to step 19

E: Go to step 21

A: Go to next step

INSPECT REAR NO. 3 SPEAKER
1. 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.
NG: Go to step 14

OK: REPLACE REAR NO. 3 SPEAKER (See INSPECTION )

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

Disconnect the R35 amplifier connector.
Disconnect the Q8 and Q3 speaker connectors.

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

Standard resistance:

for LH

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R35-3 (TWL+) - Q8-1 (+TW)	Always	Below 1 Ω
R35-9 (TWL-) - Q8-2 (-TW)	Always	Below 1 Ω
R35-3 (TWL+) - Body ground	Always	10 kΩ or higher
R35-9 (TWL-) - Body ground	Always	10 kΩ or higher

for RH

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R35-4 (TWR+) - Q3-1 (+TW)	Always	Below 1 Ω
R35-10 (TWR-) - Q3-2 (-TW)	Always	Below 1 Ω
R35-4 (TWR+) - Body ground	Always	10 kΩ or higher
R35-10 (TWR-) - Body ground	Always	10 kΩ or higher

Fig 8: Checking Harness And Connector (Stereo Component Amplifier - Rear No. 3 Speaker)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE STEREO COMPONENT AMPLIFIER (See REMOVAL )

INSPECT REAR NO. 1 SPEAKER

Disconnect the O21 and O10 speaker connectors.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 - 2	Always	5 to 7 Ω

Fig 9: Identifying Rear No. 1 Speaker Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE REAR NO. 1 SPEAKER (See REMOVAL )

OK: Go to next step

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

Disconnect the O21, O10, Q8 and Q3 speaker connectors

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

Standard resistance:

for LH

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
Q8-3 (RLD+) - O21-1	Always	Below 1 Ω
Q8-4 (RLD-) - O21-2	Always	Below 1 Ω
Q8-3 (RLD+) - Body ground	Always	10 kΩ or higher
Q8-4 (RLD-) - Body ground	Always	10 kΩ or higher

for RH

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
Q3-3 (RRD+) - O10-1	Always	Below 1 Ω
Q3-4 (RRD-) - O10-2	Always	Below 1 Ω
Q3-3 (RRD+) - Body ground	Always	10 kΩ or higher
Q3-4 (RRD-) - Body ground	Always	10 kΩ or higher

Fig 10: Checking Harness And Connector (Rear No. 3 Speaker - Rear No. 1 Speaker)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE REAR NO. 3 SPEAKER (See INSPECTION )

INSPECT REAR NO. 2 SPEAKER

Disconnect the O12 and O1 speaker connectors.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 - 2	Always	4.8 to 7.2 Ω

Fig 11: Identifying Rear No. 2 Speaker Connector

NG: REPLACE REAR NO. 2 SPEAKER (See REMOVAL )

OK: Go to next step

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

Disconnect the R35 and R39 amplifier connector.
Disconnect the O12 and O1 speaker connectors.

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

Standard resistance:

for LH

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R39-4 (L+) - O12-1	Always	Below 1 Ω
R39-10 (L-) - O12-2	Always	Below 1 Ω
R39-4 (L+) - Body ground	Always	10 kΩ or higher
R39-10 (L-) - Body ground	Always	10 kΩ or higher

for RH

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R35-1 (R+) - O1-1	Always	Below 1 Ω
R35-5 (R-) - O1-2	Always	Below 1 Ω
R35-1 (R+) - Body ground	Always	10 kΩ or higher
R35-5 (R-) - Body ground	Always	10 kΩ or higher

Fig 12: Checking Harness And Connector (Stereo Component Amplifier - Rear No. 2 Speaker)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE STEREO COMPONENT AMPLIFIER (See REMOVAL )

INSPECT REAR HEADER SPEAKER

Disconnect the S18 and R18 speaker connectors.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 - 2	Always	5 to 7 Ω

Fig 13: Identifying Rear Header Speaker Connector

NG: REPLACE REAR HEADER SPEAKER (See REMOVAL )

OK: Go to next step

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR HEADER SPEAKER)

Disconnect the R36 amplifier connector.
Disconnect the S18 and R18 speaker connectors.

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

Standard resistance:

for LH

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R36-2 (SL+) - S18-1	Always	Below 1 Ω
R36-7 (SL-) - S18-2	Always	Below 1 Ω
R36-2 (SL+) - Body ground	Always	10 kΩ or higher
R36-7 (SL-) - Body ground	Always	10 kΩ or higher

for RH

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R36-1 (SR+) - R18-1	Always	Below 1 Ω
R36-6 (SR-) - R18-2	Always	Below 1 Ω
R36-1 (SR+) - Body ground	Always	10 kΩ or higher
R36-6 (SR-) - Body ground	Always	10 kΩ or higher

Fig 14: Checking Harness And Connector (Stereo Component Amplifier - Rear Header Speaker)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE STEREO COMPONENT AMPLIFIER (See REMOVAL )

INSPECT STEREO COMPONENT SPEAKER

Disconnect the R20 speaker connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 - 4	Always	10.5 to 14 5 Ω

Fig 15: Identifying Stereo Component Speaker Connector

NG: REPLACE STEREO COMPONENT SPEAKER (See INSPECTION )

OK: Go to next step

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

Disconnect the R39 amplifier connector.
Disconnect the R20 speaker connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R39-1 (WF1+) - R20-1 (WF1+)	Always	Below 1 Ω
R39-5 (WF1-) - R20-3 (WF1-)
R39-2 (WF2+) - R20-2 (WF2+)
R39-6 (WF2-) - R20-4 (WF2-)
R39-1 (WF1+) - Body ground	Always	10 kΩ or higher
R39-5 (WF1-) - Body ground
R39-2 (WF2+) - Body ground
R39-6 (WF2-) - Body ground

Fig 16: Checking Harness And Connector (Stereo Component Amplifier - Stereo Component Speaker)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE STEREO COMPONENT AMPLIFIER (See REMOVAL )