Inspection Procedure

CHECK MULTI-DISPLAY CONTROLLER

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
R32-18 (MUT6) - Body ground	Turn engine switch to ACC, audio system is playing → Changing modes	Above 3.5 V → Below 1V

Fig 1: Identifying R32 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )

CHECK SATELLITE RADIO TUNER

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

Result

RESULT REFERENCE

Result	Proceed to
w/ Satellite Radio Tuner	A
w/o Satellite Radio Tuner	B

B: Go to step 6

A: Go to Next Step

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - SATELLITE RADIO TUNER)

Disconnect the L53 receiver connector.
Disconnect the R27 tuner connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
L53-6 (MUTE) - R27-6 (MUTE)	Always	Below 1 Ω
L53-6 (MUTE) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying L53 Radio Receiver And R27 Satellite Radio Tuner Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (SATELLITE RADIO TUNER - MULTI-DISPLAY CONTROLLER)

Disconnect the R29 tuner connector.
Disconnect the R32 controller connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
R29-15 (MUT2) - R32-18 (MUT6)	Always	Below 1 Ω
R32-18 (MUT6) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying R29 Satellite Radio Tuner And R32 Multi-Display Controller Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK SATELLITE RADIO TUNER (OPERATION)
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: Go to step 7
  
  OK: END (SATELLITE RADIO TUNER IS DEFECTIVE)

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY CONTROLLER)

Disconnect the L53 receiver connector.
Disconnect the R32 controller connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
L53-6 (MUTE) - R32-18 (MUT6)	Always	Below 1 Ω
L53-6 (MUTE) - Body ground	Always	10 kΩ or higher

Fig 4: Identifying L53 Radio Receiver And R32 Multi-Display Controller Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK MULTI-DISPLAY CONTROLLER

Reconnect the R32 controller connector.

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
R32-18 (MUT6) - Body ground	Audio system is playing	Above 3.5 V

Fig 5: Identifying R32 Connector Terminals

NG: REPLACE MULTI-DISPLAY CONTROLLER (See REMOVAL )

OK: REPLACE RADIO RECEIVER ASSEMBLY (See REMOVAL )