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 L53, L51, L57 And L52 Receiver Connectors

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

STANDARD RESISTANCE SPECIFICATION

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

STANDARD RESISTANCE SPECIFICATION

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.

Identify the component which has stored this code.

Component table

COMPONENT REFERENCE

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.

Fig 2: Screen Display - LAN Monitor Mode

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: 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