Inspection Procedure

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

HINT.

After the inspection is completed, clear the DTCs.

INSPECT STEREO COMPONENT AMPLIFIER
1. Disconnect the stereo component amplifier connectors P29 and P28
2. Clear the DTCs and recheck for DTCs.
3. Check if DTC 74-40 is output.
  OK: DTC 74-40 is not output.
NG: REPLACE STEREO COMPONENT AMPLIFIER (See REMOVAL )

OK: Go to next step
CHECK OPERATION
1. Reconnect the stereo component amplifier connector P29
2. Check if DTC 74-40 is output
  OK: DTC 74-40 is not output.
NG: Go to step 13

OK: Go to next step

CHECK HARNESS AND CONNECTOR

Disconnect the connectors shown in the illustration from the stereo component amplifier and speakers.

Fig 1: Identifying Stereo Component Amplifier And Speakers Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

Fig 2: Identifying Front Center Speaker And Woofer Box Speaker Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RESISTANCE SPECIFICATION

Tester Connection

Condition

Specified Condition

P28-3 (CTR+) - Body ground⁽¹⁾

Always

10 kΩ or higher

P28-9 (CTR-) - Body ground⁽¹⁾

Always

10 kΩ or higher

P28-8 (ML+) - Body ground⁽²⁾

Always

10 kΩ or higher

P28-7 (ML-) - Body ground⁽²⁾

Always

10 kΩ or higher

O4-2 (+TW) - Body ground⁽²⁾

Always

10 kΩ or higher

O4-4 (-TW) - Body ground⁽²⁾

Always

10 kΩ or higher

P28-3 (MR+) - Body ground⁽²⁾

Always

10 kΩ or higher

P28-9 (MR-) - Body ground⁽²⁾

Always

10 kΩ or higher

N4-2 (+TW) - Body ground⁽²⁾

Always

10 kΩ or higher

N4-4 (-TW) - Body ground⁽²⁾

Always

10 kΩ or higher

P28-8 (SL+) - Body ground⁽¹⁾

Always

10 kΩ or higher

P28-7 (SL-) - Body ground⁽¹⁾

Always

10 kΩ or higher

P28-2 (SR+) - Body ground⁽¹⁾

Always

10 kΩ or higher

P28-6 (SR-) - Body ground⁽¹⁾

Always

10 kΩ or higher

P28-4 (WFL+) - Body ground

Always

10 kΩ or higher

P28-10 (WFL-) - Body ground

Always

10 kΩ or higher

P28-2 (WF2+) - Body ground⁽²⁾

Always

10 kΩ or higher

P28-6 (WF2-) - Body ground⁽²⁾

Always

10 kΩ or higher

P28-1 (WF1+)-Body ground

Always

10 kΩ or higher

P28-5 (WF1-) - Body ground

Always

10 kΩ or higher

⁽¹⁾	w/ Front Center Speaker

⁽²⁾	w/o Front Center Speaker

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT FRONT NO. 1 SPEAKER (LEFT HAND)

Resistance check

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

Standard Resistance

w/ Front Center Speaker

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
M13-1 - M13-2	Always	6 to 10 Ω

w/o Front Center Speaker

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
M13-1 - M13-2	Always	3.2 to 4 8 Ω

Fig 3: Identifying Front No. 1 Speaker Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to next step

CONFIRM MODEL

Result

RESULT REFERENCE

Result	Proceed to
w/o Front Center Speaker	A
w/ Front Center Speaker	B

B: Go to step 10

A: Go to next step

INSPECT REAR NO. 2 SPEAKER (RIGHT HAND)
1. Reconnect the stereo component amplifier connector and rear No. 2 speaker connector
2. Check that audio sound can be heard from the speaker
  OK: Audio sound can be heard.
NG: REPLACE REAR NO. 2 SPEAKER (RIGHT HAND) (See REMOVAL )

OK: Go to next step
INSPECT REAR NO. 2 SPEAKER (LEFT HAND)
1. Reconnect the stereo component amplifier connector and rear No. 2 speaker connector
2. Check that audio sound can be heard from the speaker.
  OK: Audio sound can be heard.
NG: REPLACE REAR NO. 2 SPEAKER (LEFT HAND) (See REMOVAL )

OK: Go to next step
INSPECT REAR NO. 3 SPEAKER (RIGHT HAND)
1. Reconnect the stereo component amplifier connector and rear No. 3 speaker connector.
2. Check that audio sound can be heard from the speaker
  OK: Audio sound can be heard.
NG: REPLACE REAR NO. 3 SPEAKER (RIGHT HAND) (See REMOVAL )

OK: Go to next step
INSPECT REAR NO. 3 SPEAKER (LEFT HAND)
1. Reconnect the stereo component amplifier connector and rear No. 3 speaker connector
2. Check that audio sound can be heard from the speaker.
  OK: Audio sound can be heard.
NG: REPLACE REAR NO. 3 SPEAKER (LEFT HAND) (See REMOVAL )

OK: REPLACE WOOFER BOX SPEAKER (See REMOVAL )
INSPECT REAR STEREO COMPONENT SPEAKER (LEFT HAND)
1. Reconnect the stereo component amplifier connector and rear stereo component speaker connector
2. Check that audio sound can be heard from the speaker
  OK: Audio sound can be heard.
NG: REPLACE REAR STEREO COMPONENT SPEAKER (LEFT HAND) (See REMOVAL )

OK: Go to next step
INSPECT REAR STEREO COMPONENT SPEAKER (RIGHT HAND)
1. Reconnect the stereo component amplifier connector and rear stereo component speaker connector
2. Check that audio sound can be heard from the speaker.
  OK: Audio sound can be heard.
NG: REPLACE REAR STEREO COMPONENT SPEAKER (RIGHT HAND) (See REMOVAL )

OK: Go to next step

INSPECT FRONT STEREO COMPONENT SPEAKER

Resistance check

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

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
K2-1 - K2-2	Always	7 to 9 Ω

Fig 4: Identifying Front Stereo Component Speaker Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT STEREO COMPONENT SPEAKER (See REMOVAL )

OK: REPLACE WOOFER BOX SPEAKER (See REMOVAL )

CHECK HARNESS AND CONNECTOR

Disconnect the connectors shown in the illustration from the stereo component amplifier and speakers

Fig 5: Identifying Stereo Component Amplifier And Speakers Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection

Condition

Specified Condition

P29-2 (FL+) - Body ground

Always

10 kΩ or higher

P29-6 (FL-) - Body ground

Always

10 kΩ or higher

M4-2 (+) - Body ground

Always

10 kΩ or higher

M4-4 (-) - Body ground

Always

10 kΩ or higher

P29-8 (FR+) - Body ground

Always

10 kΩ or higher

P29-7 (FR-) - Body ground

Always

10 kΩ or higher

L2-2 (+) - Body ground

Always

10 kΩ or higher

L2-4 (-) - Body ground

Always

10 kΩ or higher

P29-3 (RL+) - Body ground

Always

10 kΩ or higher

P29-9 (RL-) - Body ground

Always

10 kΩ or higher

O5-2 (+TW) - Body ground⁽¹⁾

Always

10 kΩ or higher

O5-4 (-TW) - Body ground⁽¹⁾

Always

10 kΩ or higher

P29-4 (RR+) - Body ground

Always

10 kΩ or higher

P29-10 (RR-) - Body ground

Always

10 kΩ or higher

N5-2 (+TW) - Body ground⁽¹⁾

Always

10 kΩ or higher

N5-4 (-TW) - Body ground⁽¹⁾

Always

10 kΩ or higher

P29-1 (WFR+) - Body ground

Always

10 kΩ or higher

P29-5 (WFR-) - Body ground

Always

10 kΩ or higher

⁽¹⁾	w/ Front Center Speaker

Fig 6: Identifying Rear Speaker Connectors

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT FRONT NO. 1 SPEAKER (RIGHT HAND)

Resistance check

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

Standard Resistance

w/ Front Center Speaker

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
L1-1 -L1-2	Always	6 to 10 Ω

w/o Front Center Speaker

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
L1-1 - L1-2	Always	3.2 to 4.8 Ω

Fig 7: Identifying Front No. 1 Speaker Connectors

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

OK: Go to next step

INSPECT FRONT NO. 2 SPEAKER (RIGHT HAND)
1. Reconnect the stereo component amplifier connector and front No. 2 speaker connector.
2. Check that audio sound can be heard from the speaker.
  OK: Audio sound can be heard.
NG: REPLACE FRONT NO. 2 SPEAKER (RIGHT HAND) (See REMOVAL )

OK: Go to next step
INSPECT FRONT NO. 2 SPEAKER (LEFT HAND)
1. Reconnect the stereo component amplifier connector and front No. 2 speaker connector
2. Check that audio sound can be heard from the speaker.
  OK: Audio sound can be heard.
NG: REPLACE FRONT NO. 2 SPEAKER (LEFT HAND) (See REMOVAL )

OK: Go to next step
INSPECT FRONT NO. 3 SPEAKER (RIGHT HAND)
1. Reconnect the stereo component amplifier connector and front No. 3 speaker connector.
2. Check that audio sound can be heard from the speaker.
  OK: Audio sound can be heard.
NG: REPLACE FRONT NO. 3 SPEAKER (RIGHT HAND) (See REMOVAL )

OK: Go to next step
INSPECT FRONT NO. 3 SPEAKER (LEFT HAND)
1. Reconnect the stereo component amplifier connector and front No. 3 speaker connector.
2. Check that audio sound can be heard from the speaker.
  OK: Audio sound can be heard.
NG: REPLACE FRONT NO. 3 SPEAKER (LEFT HAND) (See REMOVAL )

OK: Go to next step

CONFIRM MODEL

Result

RESULT REFERENCE

Result	Proceed to
w/ Front Center Speaker	A
w/o Front Center Speaker	B

B: Go to step 23

A: Go to next step

INSPECT REAR NO. 2 SPEAKER (RIGHT HAND)
1. Reconnect the stereo component amplifier connector and rear No. 2 speaker connector
2. Check that audio sound can be heard from the speaker
  OK: Audio sound can be heard.
NG: REPLACE REAR NO. 2 SPEAKER (RIGHT HAND) (See REMOVAL )

OK: Go to next step
INSPECT REAR NO. 2 SPEAKER (LEFT HAND)
1. Reconnect the stereo component amplifier connector and rear No. 2 speaker connector.
2. Check that audio sound can be heard from the speaker.
  OK: Audio sound can be heard.
NG: REPLACE REAR NO. 2 SPEAKER (LEFT HAND) (See REMOVAL )

OK: Go to next step
INSPECT REAR SPEAKER (RIGHT HAND)
1. Reconnect the stereo component amplifier connector and rear speaker connector
2. Check that audio sound can be heard from the speaker.
  OK: Audio sound can be heard.
NG: REPLACE REAR SPEAKER (RIGHT HAND) (See REMOVAL )

OK: REPLACE REAR SPEAKER (LEFT HAND) (See REMOVAL )

INSPECT REAR SPEAKER (LEFT HAND)

Resistance check

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

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
O3-1 - O3-2	Always	3.2 to 4.8 Ω

Fig 8: Identifying Rear Speaker Connectors

NG: REPLACE REAR SPEAKER (LEFT HAND) (See REMOVAL )

OK: REPLACE REAR SPEAKER (RIGHT HAND) (See REMOVAL )