Inspection Procedure

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

IDENTIFY COMPONENT SHOWN BY SUB-CODE
1. Enter the diagnostic mode.
2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
3. Identify the component shown by the sub-code.
  HINT:
  - "140 (navigation receiver)" is the component shown by the sub-code in the example shown in the illustration.
  - The sub-code will be indicated by its physical address.
  - For the component list, refer to "DIAGNOSIS DISPLAY DETAILED DESCRIPTION " .
    
    Fig 1: Identifying LAN Monitor Mode
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE

Inspect the power source circuit of the component shown by the sub-code.

Component Table

COMPONENT REFERENCE

Component	Proceed to
Stereo component amplifier (440)	Stereo Component Amplifier Power Source Circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )
Television display (1B0)*	Television Display Power Source Circuit (See TELEVISION DISPLAY POWER SOURCE CIRCUIT )*
HINT: *: w/ Rear Seat Entertainment System If the power source circuit is operating normally, proceed to the next step.

INSPECT NAVIGATION RECEIVER ASSEMBLY

Disconnect the I20 and I8* navigation receiver assembly connectors.
HINT:

*: w/ Rear Seat Entertainment System

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

Standard Resistance

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
I20-5 (ATX+) - I20-15 (ATX-)	Always	60 to 80 Ω
I8-9(TXM+) - I8-10 (TXM-)*	Always	60 to 80 Ω
HINT: *: w/ Rear Seat Entertainment System

Reconnect the navigation receiver assembly connectors.

NG: REPLACE NAVIGATION RECEIVER ASSEMBLY (See REMOVAL )

Fig 2: Identifying I20 And I8* Navigation Receiver Assembly Connectors Terminals

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - COMPONENT SHOWN BY SUB-CODE)

Fig 3: Navigation Receiver Assembly Wiring Diagram - w/o Rear Seat Entertainment System
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Navigation Receiver Assembly Wiring Diagram - w/ Rear Seat Entertainment System
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:
- Start the check from the circuit that is near the component shown by the sub-code first.
- For details of the connectors, refer to "Terminals of ECU" (See TERMINALS OF ECU ).
1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the navigation receiver assembly and the component shown by the sub-code.
  1. Disconnect all connectors between the navigation receiver assembly and the component shown by sub-code.
  2. Check for an open or short in the AVC-LAN circuit between the navigation receiver assembly and the component shown by the sub-code.
    OK: There is no open or short circuit.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step
REPLACE COMPONENT SHOWN BY SUB-CODE
1. Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.
  OK: Same problem does not occur.
NG: REPLACE NAVIGATION RECEIVER ASSEMBLY (See REMOVAL )

OK: END