Inspection Procedure

NOTE: Be sure to read DESCRIPTION before performing the following procedures.

CHECK MULTI-DISPLAY POWER SOURCE CIRCUIT
1. Refer to the MULTI-DISPLAY POWER SOURCE CIRCUIT .
  If the power source circuit is operating normally, proceed to the next step.

INSPECT RADIO RECEIVER

Fig 1: Identifying Radio Receiver Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the L53, L51, L57 and L52 receiver connectors.

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

Standard resistance:

for CD changer models

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
L53-9 (TXM+) - L53-10 (TXM-)	Always	60 to 80 Ω
L51-5 (ATX+) - L51-15 (ATX-)	Always	60 to 80 Ω
L57-9 (TX+) - L57-10 (TX-)	Always	60 to 80 Ω

for DVD changer models

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
L53-9 (TXM+) - L53-10 (TXM-)	Always	60 to 80 Ω
L51-5 (ATX+) - L51-15 (ATX-)	Always	60 to 80 Ω
L52-9 (TX+) - L52-10 (TX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER ASSEMBLY (See REMOVAL )

OK: GO TO NEXT STEP

IDENTIFY COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.
Press the "LAN Mon" switch to change to "LAN Monitor" mode.

Fig 2: Identifying "LAN Monitor"Display Screen
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Identify the component which has stored this code.

Component table

COMPONENT CHART

Display	Component
AUDIO H/U	Radio receiver
DSP-AMP	Stereo component amplifier
NAVI*5	Navigation ECU
CLOCK	Clock
RSE*1	Television display
DVD-P*2	Disc player
CAMERA-C*3	Parking assist ECU
Rr-CONT	Rear power seat module switch
XM*4	Satellite radio tuner
HINT: 1: w/ Rear Seat Entertainment System 2: w/ Disc Player 3: w/ Advanced Parking Guidance System 4: w/ Satellite Radio Tuner *5: w/ Navigation System (for DVD) "NAVI" is the component which has stored this code in the example shown in the illustration.

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT WHICH HAS STORED THIS CODE)
HINT:

For details of the connectors, refer to "TERMINALS OF ECU " .
1. Referring to the AVC-LAN wiring diagram, check the AVC-LAN circuit between the multi-display and the component which has stored this code.
  1. Disconnect all connectors between the multi-display and the component which has stored this code.
  2. Check for an open or short in the AVC-LAN circuit between the multi-display and the component which has stored this code.
    OK :
    
    There is no open or short circuit.
    
    Fig 3: AVC-LAN Wiring Diagram
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP
CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - RADIO RECEIVER)
HINT:

For details of the connectors, refer to "TERMINALS OF ECU " .
1. Referring to the AVC-LAN wiring diagram, check the AVC-LAN circuit between the multi-display and the radio receiver.
  1. Disconnect all connectors between the multi-display and the radio receiver.
  2. Check for an open or short in the AVC-LAN circuit between the multi-display and the radio receiver.
    OK :
    
    There is no open or short circuit.
    
    Fig 4: Identifying AVC-LAN Wiring Diagram
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP
REPLACE MULTI-DISPLAY WITH NORMAL ONE AND CHECK
1. Replace the multi-display with a normal one and check if the same problem occurs again (see REMOVAL ).
  OK :
  
  Same problem does not occur.
NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE

OK: END