Speaker Circuit [10/2022 - ]: Procedure

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

   Refer to OPERATION CHECK [10/2022 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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  6

Result: 

A 

See step  2

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 (telematics transceiver) 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
   G5-3 (+) - I1-2 (+)	Always	Below 1 Ω
   G5-1 (-) - I1-1 (-)	Always	Below 1 Ω
   G6-3 (+) - J1-2 (+)	Always	Below 1 Ω
   G6-1 (-) - J1-1 (-)	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
   G151-3 (SPO+) - Body ground	Always	10 kΩ or higher
   G151-4 (SPO-) - 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
   G6-3 (+) - Body ground	Always	10 kΩ or higher
   G6-1 (-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Remove the DCM (telematics transceiver).

   Refer to REMOVAL [10/2022 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [10/2022 - ] 

Result: 

OK 

See step  4

1. Remove the front No. 1 speaker assembly.

   Refer to REMOVAL [06/2020 - ]

2. Inspect the front No. 1 speaker assembly.

   Refer to INSPECTION [06/2020 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [06/2020 - ] 

Result: 

OK 

See step  5

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 [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  7

1. Remove the rear speaker assembly.

   Refer to REMOVAL [06/2020 - ]

2. Inspect the rear speaker assembly.

   Refer to INSPECTION [06/2020 - ]

   OK

   Malfunction disappears.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2022 - ] 

Result: 

NG 

REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [06/2020 - ]