Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT RADIO RECEIVER

Disconnect the R32 controller connector.

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 R32 Controller Connector

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
R32-15 (R6-) - Body ground
R32-16 (R6+) - Body ground

NG: Go to step 2

OK: REPLACE MULTI-DISPLAY CONTROLLER (See REMOVAL )

CHECK SATELLITE RADIO TUNER

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

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

Disconnect the L53 receiver connector
Disconnect the R27 and R29 tuner connectors.
Disconnect the R32 controller connector.

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

Fig 2: Checking Harness And Connector (Radio Receiver - Satellite Radio Tuner And Multi-Display Controller)

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: REPLACE RADIO RECEIVER (See REMOVAL )

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

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+)
L53-3 (CDR-) - R32-1S (R6-)
L53-4 (CDL+) - R32-14 (L6+)
L53-5 (CDL-) - R32-13 (L6-)
R32-13 (L6-) - Body ground	Always	10 kΩ or higher
R32-14 (L6+) - Body ground
R32-15 (R6-) - Body ground
R32-16 (R6+) - Body ground

Fig 3: Checking Harness And Connector (Radio Receiver - Multi-Display Controller)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE RADIO RECEIVER (See REMOVAL )