Inspection Procedure

1. Disconnect the R32 controller connector.
2. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions, as shown in the chart below.
   Fig 1: Identifying Radio Receiver Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Signal waveform 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   R32-13 (L6-) - Body ground	Audio sound is being produced	A waveform synchronized with sound is output
   R32-14 (L6+) - Body ground	Audio sound is being produced	A waveform synchronized with sound is output
   R32-15 (R6-) - Body ground	Audio sound is being produced	A waveform synchronized with sound is output
   R32-16 (R6+) - Body ground	Audio sound is being produced	A waveform synchronized with sound is output

NG: Go to step 2 

OK: REPLACE MULTI-DISPLAY CONTROLLER (See  REMOVAL   ) 

1. Check if the satellite radio tuner is equipped on the vehicle.

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   w/ Satellite radio tuner	A
   w/o Satellite radio tuner	B

B: Go to step   5 

A: GO TO NEXT STEP 

1. Disconnect the L53 receiver connector.
2. Disconnect the R27 and R29 tuner connectors.
3. Disconnect the R32 controller connector.
   Fig 2: Identifying Radio Receiver, Tuner Connector And Multi-Display Controller Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L53-2 (CDR+) - R27-2 (R+)	Always	Below 1 Ω
   L53-3 (CDR-) - R27-3 (R-)	Always	Below 1 Ω
   L53-4 (CDL+) - R27-4 (L+)	Always	Below 1 Ω
   L53-5 (CDL-) - R27-5 (L-)	Always	Below 1 Ω
   L53-1 (CSLD) - R27-1 (SLD)	Always	Below 1 Ω
   R29-10 (FRI+) - R32-16 (R6+)	Always	Below 1 Ω
   R29-9 (FRI-) - R32-15 (R6-)	Always	Below 1 Ω
   R29-8 (FLI+) - R32-14 (L6+)	Always	Below 1 Ω
   R29-7 (FLI-) - R32-13 (L6-)	Always	Below 1 Ω
   R29-6 (SLD2) - R32-17 (SLD6)	Always	Below 1 Ω
   R27-2 (R+) - Body ground	Always	10 kΩ or higher
   R27-3 (R-) - Body ground	Always	10 kΩ or higher
   R27-4 (L+) - Body ground	Always	10 kΩ or higher
   R27-5 (L-) - Body ground	Always	10 kΩ or higher
   R32-16 (R6+)-Body ground	Always	10 kΩ or higher
   R32-15 (R6-)-Body ground	Always	10 kΩ or higher
   R32-14 (L6+) - Body ground	Always	10 kΩ or higher
   R32-13 (L6-) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Replace the satellite radio tuner with a normal one and check if the same problem occurs again (see REMOVAL  ).

   OK : 

   Same problem does not occur. 

NG: REPLACE RADIO RECEIVER (See  REMOVAL   ) 

OK: END (SATELLITE RADIO TUNER IS DEFECTIVE) 

1. Disconnect the L53 receiver connector.
2. Disconnect the R32 controller connector.
   Fig 3: Identifying Radio Receiver And Multi-Display Controller Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L53-1 (CSLD) - R32-17 (SLD6)	Always	Below 1 Ω
   L53-2 (CDR+) - R32-16 (R6+)	Always	Below 1 Ω
   L53-3 (CDR-) - R32-15 (R6-)	Always	Below 1 Ω
   L53-4 (CDL+) - R32-14 (L6+)	Always	Below 1 Ω
   L53-5 (CDL-) - R32-13 (L6-)	Always	Below 1 Ω
   R32-13 (L6-) - Body ground	Always	10 kΩ or higher
   R32-14 (L6+) - Body ground	Always	10 kΩ or higher
   R32-15 (R6-) - Body ground	Always	10 kΩ or higher
   R32-16 (R6+) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE RADIO RECEIVER (See  REMOVAL   )