Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

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

CHECK RADIO AND NAVIGATION ASSEMBLY POWER SOURCE CIRCUIT
Refer to the radio and navigation assembly power source circuit (See RADIO AND NAVIGATION ASSEMBLY POWER SOURCE CIRCUIT ).

If the power source circuit is operating normally, proceed to the next step.

INSPECT RADIO AND NAVIGATION ASSEMBLY

Disconnect the radio and navigation assembly connectors.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
ATX+ (R12-5) - ATX- (R12-15)	Always	60 to 80
TXM+ (R11-9) - TXM- (R11-10)	Always	60 to 80

Fig 1: Inspecting Radio & Navigation Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO AND NAVIGATION ASSEMBLY

OK: GO TO NEXT STEP.

IDENTIFY THE 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.

Fig 2: Pressing "LAN MON" Switch To Change To "LAN MONITOR" Mode
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Component Table:

COMPONENT TABLE

Display	Component
Rr-TV	Television display assembly
DSP-AMP	Stereo component amplifier

HINT:

"NAVI" is the component which has stored this code in the example shown in the illustration.

CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSEMBLY - COMPONENT WHICH HAS STORED THIS CODE)
HINT:

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

OK: GO TO NEXT STEP.
REPLACE RADIO AND NAVIGATION ASSEMBLY
1. Replace the radio and navigation assembly with a normal one and check if the same problem occurs again.
  OK:
  
  Same problem does not occur.
NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE

OK: END