Speaker Circuit [09/2014 - ]: Procedure

1. Enter the "System Check Mode" screen. Refer to Check Speaker in Operation Check. Refer to OPERATION CHECK [09/2014 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   Result	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.

B → See step   6 

A: Go to next step 

1. Disconnect the I152 radio and display receiver assembly connector.
2. Disconnect the I83 and I1 front No. 2 speaker assembly connectors.
3. Disconnect the J5 and K5 front No. 1 speaker assembly connectors.
4. Measure the resistance between each of the front No. 2 speaker assemblies and the radio and display receiver assembly to check for an open circuit in the wire harness.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I152-1 (FR+) - I83-4 (TWR+)	Always	Below 1 Ω
   I152-5 (FR-) - I83-2 (TWR-)	Always	Below 1 Ω
   I152-2 (FL+) - I1-4 (TWL+)	Always	Below 1 Ω
   I152-6 (FL-) - I1-2 (TWL-)	Always	Below 1 Ω

5. Measure the resistance between each of the front No. 1 speaker assemblies and the front No. 2 speaker assemblies to check for an open circuit in the wire harness.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I83-3 (+) - J5-1	Always	Below 1 Ω
   I83-1 (-) - J5-2	Always	Below 1 Ω
   I1-3 (+) - K5-1	Always	Below 1 Ω
   I1-1 (-) - K5-2	Always	Below 1 Ω

6. Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I152-1 (FR+) - Body ground	Always	10 kΩ or higher
   I152-5 (FR-) - Body ground	Always	10 kΩ or higher
   I152-2 (FL+) - Body ground	Always	10 kΩ or higher
   I152-6 (FL-) - Body ground	Always	10 kΩ or higher

7. Measure the resistance between each of the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I83-3 (+) - Body ground	Always	10 kΩ or higher
   I83-1 (-) - Body ground	Always	10 kΩ or higher
   I1-3 (+) - Body ground	Always	10 kΩ or higher
   I1-1 (-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the front No. 2 speaker assembly. Refer to REMOVAL [09/2014 - ] .
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

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

   TEXT IN ILLUSTRATION
   
   

   *A	for RH
   *B	for LH
   *a	Component without harness connected (Front No. 2 Speaker Assembly)

NG → See step   8 

OK: Go to next step 

1. Check that the malfunction disappears when a known good speaker is installed. Refer to REMOVAL [09/2014 - ] .

   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 No. 2 speaker assembly is defective, inspect by interchanging the right one with the left one.
   • Perform the above inspection on both the LH and RH side.

NG → See step   5 

OK → END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE) 

1. Remove the front No. 1 speaker assembly. Refer to REMOVAL [09/2014 - ] .
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

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

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Front No. 1 Speaker Assembly)

NG → See step   9 

OK → See step   10 

1. Disconnect the I153 radio and display receiver assembly connector.
2. Disconnect the O18 and O21 rear speaker assembly connectors.
3. Measure the resistance between each of the rear speaker assemblies and the radio and display receiver assembly to check for an open circuit in the wire harness.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I153-1 (RR+) - O18-1	Always	Below 1 Ω
   I153-3 (RR-) - O18-2	Always	Below 1 Ω
   I153-2 (RL+) - O21-1	Always	Below 1 Ω
   I153-6 (RL-) - O21-2	Always	Below 1 Ω

4. Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I153-1 (RR+) - Body ground	Always	10 kΩ or higher
   I153-3 (RR-) - Body ground	Always	10 kΩ or higher
   I153-2 (RL+) - Body ground	Always	10 kΩ or higher
   I153-6 (RL-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the rear speaker assembly. Refer to REMOVAL [09/2014 - ] .
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

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

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Rear Speaker Assembly)

NG → See step   11 

OK → See step   10