Inspection Procedure

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

Disconnect the multi-display connector M3 and radio receiver connector R31.
Measure the resistance according to the value(s) in the table below.

Standard resistance

RESISTANCE SPECIFICATION

Tester connection	Condition	Specified condition
GND - VV-	Always	Below 1 Ω
NTSC - VV+	Always	Below 1 Ω
SLD-SGND	Always	Below 1 Ω
NTSC - Body ground	Always	10 Ω or higher
GND - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 1: Disconnecting Multi-Display Connector M3 And Radio Receiver Connector R31

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OK: Go to next step

INSPECT RADIO RECEIVER (OUTPUT SIGNAL)

Reconnect the radio receiver connector R31.

Fig 2: Connecting Multi-Display Connector M3
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Measure the waveform according to the table below.

TESTER CONNECTION AND SPECIFIED CONDITION

Tester connection	Condition	Specified condition
VV+ - Body ground	DVD display is ON	A waveform synchronized with display signals is output

Fig 3: Waveform Graph

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

HINT:

The waveform pattern may differ from that shown in the illustration due to differences in oscilloscope settings. A normal radio receiver operating condition can be determined if any waveform is output.

Reference: Oscilloscope waveform
1. Terminal: VV+ - Body ground Setting: 200 mV/DIV. 10 μs/DIV. Condition: DVD display is on.
NG: REPLACE RADIO RECEIVER

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