Speaker Circuit [06/2020 - 10/2022]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for 6 Speakers	A
   for 9 Speakers	B

Result: 

B 

See step  12

Result: 

A 

See step  2

1. Enter the "System Check Mode" screen. Refer to Check Speaker in Operation Check.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Refer to OPERATION CHECK [06/2020 - 10/2022]

2. Perform the operation check above and determine the speaker that is not operating.

   Result

   Not Operating Speaker	Proceed to
   Front No. 1 speaker assembly or front No. 2 speaker assembly	A
   Rear speaker assembly	B

   HINT: 

   If sound cannot be heard from any speaker, inspect all of them.

Result: 

B 

See step  10

Result: 

A 

See step  3

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ Manual (SOS) Switch	A
   w/o Manual (SOS) Switch	B

Result: 

B 

See step  7

Result: 

A 

See step  4

1. Disconnect the G4 radio and display receiver assembly connector.
2. Disconnect the I1 and J1 front No. 1 speaker assembly connectors.
3. Disconnect the G5 and G6 front No. 2 speaker assembly connectors.
4. Disconnect the G151 DCM (telephone transceiver assembly) connector.
5. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G4-1 (FR+) - G151-1 (SPI+)	Always	Below 1 Ω
   G4-6 (FR-) - G151-2 (SPI-)	Always	Below 1 Ω
   G151-3 (SPO+) - G5-4 (TWR+)	Always	Below 1 Ω
   G151-4 (SPO-) - G5-2 (TWR-)	Always	Below 1 Ω
   G4-2 (FL+) - G6-4 (TWL+)	Always	Below 1 Ω
   G4-7 (FL-) - G6-2 (TWL-)	Always	Below 1 Ω
   I1-2 (+) - G5-3 (+)	Always	Below 1 Ω
   I1-1 (-) - G5-1 (-)	Always	Below 1 Ω
   J1-2 (+) - G6-3 (+)	Always	Below 1 Ω
   J1-1 (-) - G6-1 (-)	Always	Below 1 Ω
   G4-1 (FR+) - Body ground	Always	10 kΩ or higher
   G4-6 (FR-) - Body ground	Always	10 kΩ or higher
   G151-3 (SPO+) - Body ground	Always	10 kΩ or higher
   G151-4 (SPO-) - Body ground	Always	10 kΩ or higher
   G4-2 (FL+) - Body ground	Always	10 kΩ or higher
   G4-7 (FL-) - Body ground	Always	10 kΩ or higher
   I1-2 (+) - Body ground	Always	10 kΩ or higher
   I1-1 (-) - Body ground	Always	10 kΩ or higher
   J1-2 (+) - Body ground	Always	10 kΩ or higher
   J1-1 (-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

Refer to INSPECTION [06/2020 - ]

Result

Result: 

NG 

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY 

Refer to REMOVAL [06/2020 - ]

Result: 

OK 

See step  6

1. Remove the DCM (telephone transceiver assembly).

   Refer to REMOVAL [06/2020 - 10/2022]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (DCM [Telephone Transceiver Assembly])

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

   Standard Resistance

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

See step  9

Result: 

NG 

REPLACE DCM (TELEPHONE TRANSCEIVER ASSEMBLY) 

Refer to REMOVAL [06/2020 - 10/2022]

1. Disconnect the G4 radio and display receiver assembly connector.
2. Disconnect the I1 and J1 front No. 1 speaker assembly connectors.
3. Disconnect the G5 and G6 front No. 2 speaker assembly connectors.
4. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G4-1 (FR+) - G5-4 (TWR+)	Always	Below 1 Ω
   G4-6 (FR-) - G5-2 (TWR-)	Always	Below 1 Ω
   G4-2 (FL+) - G6-4 (TWL+)	Always	Below 1 Ω
   G4-7 (FL-) - G6-2 (TWL-)	Always	Below 1 Ω
   I1-2 (+) - G5-3 (+)	Always	Below 1 Ω
   I1-1 (-) - G5-1 (-)	Always	Below 1 Ω
   J1-2 (+) - G6-3 (+)	Always	Below 1 Ω
   J1-1 (-) - G6-1 (-)	Always	Below 1 Ω
   G4-1 (FR+) - Body ground	Always	10 kΩ or higher
   G4-6 (FR-) - Body ground	Always	10 kΩ or higher
   G4-2 (FL+) - Body ground	Always	10 kΩ or higher
   G4-7 (FL-) - Body ground	Always	10 kΩ or higher
   I1-2 (+) - Body ground	Always	10 kΩ or higher
   I1-1 (-) - Body ground	Always	10 kΩ or higher
   J1-2 (+) - Body ground	Always	10 kΩ or higher
   J1-1 (-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  8

Refer to INSPECTION [06/2020 - ]

Result

Result: 

NG 

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY 

Refer to REMOVAL [06/2020 - ]

Result: 

OK 

See step  9

1. Replace the front No. 2 speaker assembly with a new or known good one.

   Refer to REMOVAL [06/2020 - ]

2. Check the malfunction disappears.

   OK

   Malfunction disappears.

   HINT: 

   • Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.
   • 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 above inspection on both the LH and RH sides.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE) 

Result: 

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [06/2020 - 10/2022]

1. Disconnect the G4 radio and display receiver assembly connector.
2. Disconnect the K1 and L1 rear speaker assembly connectors.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G4-4 (RR+) - K1-2 (+)	Always	Below 1 Ω
   G4-9 (RR-) - K1-1 (-)	Always	Below 1 Ω
   G4-3 (RL+) - L1-2 (+)	Always	Below 1 Ω
   G4-8 (RL-) - L1-1 (-)	Always	Below 1 Ω
   G4-4 (RR+) - Body ground	Always	10 kΩ or higher
   G4-9 (RR-) - Body ground	Always	10 kΩ or higher
   G4-3 (RL+) - Body ground	Always	10 kΩ or higher
   G4-8 (RL-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  11

Refer to INSPECTION [06/2020 - ]

Result

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [06/2020 - 10/2022]

Result: 

NG 

REPLACE REAR SPEAKER ASSEMBLY 

Refer to REMOVAL [06/2020 - ]

1. Enter the "System Check Mode" screen. Refer to Check Speaker in Operation Check.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Refer to OPERATION CHECK [06/2020 - 10/2022]

2. Perform the operation check above and determine the speaker that is not operating.

   Result

   Not Operating Speaker	Proceed to
   Front No. 1 speaker assembly or front No. 3 speaker assembly	A
   Front No. 2 speaker assembly	B
   Rear speaker assembly	C
   No. 1 speaker with box assembly	D

   HINT: 

   If sound cannot be heard from any speaker, inspect all of them.

Result: 

B 

See step  16

Result: 

C 

See step  19

Result: 

D 

See step  21

Result: 

A 

See step  13

1. Disconnect the M2 stereo component amplifier assembly connector.
2. Disconnect the J1 and I1 front No. 1 speaker assembly connectors.
3. Disconnect the G6 and G5 front No. 3 speaker assembly connectors.
4. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M2-9 (FR+) - G5-4 (TWR+)	Always	Below 1 Ω
   M2-24 (FR-) - G5-2 (TWR-)	Always	Below 1 Ω
   M2-14 (FL+) - G6-4 (TWL+)	Always	Below 1 Ω
   M2-29 (FL-) - G6-2 (TWL-)	Always	Below 1 Ω
   J1-2 (+) - G6-3 (+)	Always	Below 1 Ω
   J1-1 (-) - G6-1 (-)	Always	Below 1 Ω
   I1-2 (+) - G5-3 (+)	Always	Below 1 Ω
   I1-1 (-) - G5-1 (-)	Always	Below 1 Ω
   M2-9 (FR+) - Body ground	Always	10 kΩ or higher
   M2-24 (FR-) - Body ground	Always	10 kΩ or higher
   M2-14 (FL+) - Body ground	Always	10 kΩ or higher
   M2-29 (FL-) - Body ground	Always	10 kΩ or higher
   G6-3 (+) - Body ground	Always	10 kΩ or higher
   G6-1 (-) - Body ground	Always	10 kΩ or higher
   G5-3 (+) - Body ground	Always	10 kΩ or higher
   G5-1 (-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  14

Refer to INSPECTION [06/2020 - ]

Result

Result: 

NG 

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY 

Refer to REMOVAL [06/2020 - ]

Result: 

OK 

See step  15

Refer to INSPECTION [06/2020 - ]

Result

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [06/2020 - 10/2022]

Result: 

NG 

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY 

Refer to REMOVAL [06/2020 - ]

1. Disconnect the M2 stereo component amplifier assembly connector.
2. Disconnect the G7 and G8 front No. 2 speaker assembly connectors.
3. Disconnect the G151 DCM (telephone transceiver assembly) connector.
4. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M2-10 (TWL+) - G8-1 (+)	Always	Below 1 Ω
   M2-25 (TWL-) - G8-2 (-)	Always	Below 1 Ω
   M2-13 (TWR+) - G151-1 (SPI+)	Always	Below 1 Ω
   M2-28 (TWR-) - G151-2 (SPI-)	Always	Below 1 Ω
   G151-3 (SPO+) - G7-1 (+)	Always	Below 1 Ω
   G151-4 (SPO-) - G7-2 (-)	Always	Below 1 Ω
   M2-10 (TWL+) - Body ground	Always	10 kΩ or higher
   M2-25 (TWL-) - Body ground	Always	10 kΩ or higher
   M2-13 (TWR+) - Body ground	Always	10 kΩ or higher
   M2-28 (TWR-) - Body ground	Always	10 kΩ or higher
   G151-3 (SPO+) - Body ground	Always	10 kΩ or higher
   G151-4 (SPO-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  17

1. Remove the DCM (telephone transceiver assembly).

   Refer to REMOVAL [06/2020 - 10/2022]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (DCM [Telephone Transceiver Assembly])

   Standard Resistance

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE DCM (TELEPHONE TRANSCEIVER ASSEMBLY) 

Refer to REMOVAL [06/2020 - 10/2022]

Result: 

OK 

See step  18

Refer to INSPECTION [06/2020 - ]

Result

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [06/2020 - 10/2022]

Result: 

NG 

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY 

Refer to REMOVAL [06/2020 - ]

1. Disconnect the M2 stereo component amplifier assembly connector.
2. Disconnect the L1 and K1 rear speaker assembly connectors.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M2-12 (RR+) - K1-2 (+)	Always	Below 1 Ω
   M2-27 (RR-) - K1-1 (-)	Always	Below 1 Ω
   M2-11 (RL+) - L1-2 (+)	Always	Below 1 Ω
   M2-26 (RL-) - L1-1 (-)	Always	Below 1 Ω
   M2-12 (RR+) - Body ground	Always	10 kΩ or higher
   M2-27 (RR-) - Body ground	Always	10 kΩ or higher
   M2-11 (RL+) - Body ground	Always	10 kΩ or higher
   M2-26 (RL-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  20

Refer to INSPECTION [06/2020 - ]

Result

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [06/2020 - 10/2022]

Result: 

NG 

REPLACE REAR SPEAKER ASSEMBLY 

Refer to REMOVAL [06/2020 - ]

1. Disconnect the M2 stereo component amplifier assembly connector.
2. Disconnect the N1 No. 1 speaker with box assembly connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M2-15 (WFR+) - N1-4 (WF+)	Always	Below 1 Ω
   M2-23 (WFL-) - N1-3 (WF-)	Always	Below 1 Ω
   M2-8 (WFL+) - N1-2 (WF+)	Always	Below 1 Ω
   M2-30 (WFR-) - N1-1 (WF-)	Always	Below 1 Ω
   M2-15 (WFR+) - Body ground	Always	10 kΩ or higher
   M2-23 (WFL-) - Body ground	Always	10 kΩ or higher
   M2-8 (WFL+) - Body ground	Always	10 kΩ or higher
   M2-30 (WFR-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  22

Refer to INSPECTION [06/2020 - ]

Result

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [06/2020 - 10/2022]

Result: 

NG 

REPLACE NO. 1 SPEAKER WITH BOX ASSEMBLY 

Refer to REMOVAL [06/2020 - ]