Speaker Circuit [12/2022 - ]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ DCM (Telematics Transceiver)	A
   w/o DCM (Telematics Transceiver)	B

Result: 

B 

See step  9

Result: 

A 

See step  2

1. Enter diagnostic mode.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Refer to DIAGNOSIS SYSTEM [12/2022 - ]

2. Select "Failure Diagnosis" from the "Service Menu" screen.
3. Select "System Check" from the "Failure Diagnosis" screen.
4. Select "SPCheck ON" from the "System Check Mode" screen and perform speaker check.

   OK

   Each speaker outputs sound from the selected audio source properly.

   Result

   Result	Proceed to
   Front No. 1 speaker assembly or front No. 3 speaker assembly does not outputs sound	A
   Rear speaker assembly does not outputs sound	B

Result: 

B 

See step  7

Result: 

A 

See step  3

1. Disconnect the K90 radio and display receiver assembly connector.
2. Disconnect the N3 and O3 front No. 1 speaker assembly connectors.
3. Disconnect the K98 and K99 front No. 3 speaker assembly connectors.
4. Disconnect the K94 DCM (telematics transceiver) connector.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K90-2 (FL+) - K99-2 (TWL+)	Always	Below 1 Ω
   K90-7 (FL-) - K99-1 (TWL-)	Always	Below 1 Ω
   K90-2 (FL+) - O3-2 (+)	Always	Below 1 Ω
   K90-7 (FL-) - O3-1 (-)	Always	Below 1 Ω
   K90-1 (FR+) - K99-1 (SPI+)	Always	Below 1 Ω
   K90-6 (FR-) - K94-2 (SPI-)	Always	Below 1 Ω
   K94-3 (SPO+) - K98-4 (TWR+)	Always	Below 1 Ω
   K94-4 (SPO-) - K98-2 (TWR-)	Always	Below 1 Ω
   K90-2 (FL+) or K99-2 (TWL+) - Body ground	Always	10 kΩ or higher
   K90-7 (FL-) or K99-1 (TWL-) - Body ground	Always	10 kΩ or higher
   K90-1 (FR+) or K94-1 (SPI+) - Body ground	Always	10 kΩ or higher
   K90-6 (FR-) or K94-2 (SPI-) - Body ground	Always	10 kΩ or higher
   K94-3 (SPO+) or K98-2 (TWR+) - Body ground	Always	10 kΩ or higher
   K94-4 (SPO-) or I76-1 (TWR-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Remove the DCM (telematics transceiver).

   Refer to REMOVAL [12/2022 - ]

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 (Telematics Transceiver))

   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+) or 3 (SPO+) - Body ground	Always	10 kΩ or higher
   2 (SPI-) or 4 (SPO-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [12/2022 - ] 

Result: 

OK 

See step  5

Refer to INSPECTION [12/2022 - ]

Result

Result: 

NG 

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

Result: 

OK 

See step  6

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

   Refer to REMOVAL [12/2022 - ]

2. Check if the malfunction disappears.

   Result

   Result	Proceed to
   Malfunction disappears	A
   Malfunction occurs	B

Result: 

A 

END (FRONT NO. 3 SPEAKER ASSEMBLY IS DEFECTIVE) 

Result: 

B 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

1. Disconnect the K90 radio and display receiver assembly connector.
2. Disconnect the M4 and L4 rear speaker assembly connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K90-3 (RL+) - M4-2 (+)	Always	Below 1 Ω
   K90-8 (RL-) - M4-1 (-)	Always	Below 1 Ω
   K90-4 (RR+) - L4-2 (+)	Always	Below 1 Ω
   K90-9 (RR-) - L4-1 (-)	Always	Below 1 Ω
   K90-3 (RL+) or M4-2 (+) - Body ground	Always	10 kΩ or higher
   K90-8 (RL-) or M4-1 (-) - Body ground	Always	10 kΩ or higher
   K90-4 (RR+) or L4-2 (+) - Body ground	Always	10 kΩ or higher
   K90-9 (RR-) or L4-1 (-) - 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 [12/2022 - ]

Result

Result: 

OK 

REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

Result: 

NG 

REPLACE REAR SPEAKER ASSSEMBLY. Refer to  REMOVAL [12/2022 - ] 

1. Enter diagnostic mode.

   Refer to DIAGNOSIS SYSTEM [12/2022 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Select "Failure Diagnosis" from the "Service Menu" screen.
3. Select "System Check" from the "Failure Diagnosis" screen.
4. Select "SPCheck ON" from the "System Check Mode" screen and perform speaker check.

   OK

   Each speaker outputs sound from the selected audio source properly.

   Result

   Not Operating Speaker	Proceed to
   Front No. 1 speaker assembly or front No. 3 speaker assembly	A
   Rear speaker assembly	B

Result: 

B 

See step  13

Result: 

A 

See step  10

1. Disconnect the K90 radio and display receiver assembly connector.
2. Disconnect the N3 and O3 front No. 1 speaker assembly connectors.
3. Disconnect the K98 and K99 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
   K90-1 (FR+) - K98-2 (TWR+)	Always	Below 1 Ω
   K90-6 (FR-) - K98-1 (TWR-)	Always	Below 1 Ω
   K90-1 (FR+) - N3-2 (+)	Always	Below 1 Ω
   K90-6 (FR-) - N3-1 (-)	Always	Below 1 Ω
   K90-2 (FL+) - K99-2 (TWL+)	Always	Below 1 Ω
   K90-7 (FL-) - K99-1 (TWL-)	Always	Below 1 Ω
   K90-2 (FL+) - O3-2 (+)	Always	Below 1 Ω
   K90-7 (FL-) - O3-1 (-)	Always	Below 1 Ω
   K90-1 (FR+) or K98-2 (TWR+) - Body ground	Always	10 kΩ or higher
   K90-6 (FR-) or K98-1 (TWR-) - Body ground	Always	10 kΩ or higher
   K90-1 (FR+) or N3-2 (+) - Body ground	Always	10 kΩ or higher
   K90-6 (FR-) or N3-1 (-) - Body ground	Always	10 kΩ or higher
   K90-2 (FL+) or K99-2 (TWL+) - Body ground	Always	10 kΩ or higher
   K90-7 (FL-) or K99-1 (TWL-) - Body ground	Always	10 kΩ or higher
   K90-2 (FL+) or O3-2 (+) - Body ground	Always	10 kΩ or higher
   K90-7 (FL-) or O3-1 (-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  11

Refer to INSPECTION [12/2022 - ]

Result

Result: 

NG 

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

Result: 

OK 

See step  12

Refer to REMOVAL [12/2022 - ]

OK

Malfunction disappears.

Result

Result: 

OK 

END 

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

1. Disconnect the K90 radio and display receiver assembly connector.
2. Disconnect the M4 and L4 rear speaker assembly connectors.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I71-4 (RR+) - L4-2 (+)	Always	Below 1 Ω
   I71-9 (RR-) - l4-1 (-)	Always	Below 1 Ω
   I71-3 (RL+) - M4-2 (+)	Always	Below 1 Ω
   I71-8 (RL-) - M4-1 (-)	Always	Below 1 Ω
   I71-4 (RR+) or L4-2 (+) - Body ground	Always	10 kΩ or higher
   I71-9 (RR-) or L4-1 (-) - Body ground	Always	10 kΩ or higher
   I71-3 (RL+) or M4-2 (+) - Body ground	Always	10 kΩ or higher
   I71-8 (RL-) or M4-1 (-) - 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 [12/2022 - ]

Result

Result: 

OK 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

Result: 

NG 

REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2022 - ]